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Who Makes The
BEST COFFEE
Coffee Answers

EVERYTHING YOU EVER WANTED TO KNOW ABOUT COFFEE.

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Six coffee questions, answered without the attitude.

Plain-English answers drawn from the Specialty Coffee Association, World Coffee Research and the National Coffee Association. These explain general coffee knowledge, not the scores or identity of any untested coffee. The full searchable answer bank is available below when you need something more specific.

Are tasting notes ingredients added to coffee?

Usually not. Notes such as citrus, cocoa or jasmine describe aromas and flavors a taster perceives in brewed coffee; they are not an ingredient list. Flavored coffees are a separate category. A roaster's tasting notes are its descriptions, not proof that we independently tasted that bag.

Why this matters: A descriptive assessment records perceived sensory characteristics. It is separate from an evaluator's judgment of quality.

Explore the flavor wheelSource: Specialty Coffee Association — Coffee Value Assessment

What is the difference between washed, natural and honey coffee?

In broad terms, washed coffee is depulped and its mucilage is removed before drying; natural coffee dries inside the whole cherry; honey coffee is depulped but dried with some mucilage remaining. These process labels do not guarantee a particular flavor or a higher score.

Why this matters: Processing choices influence fermentation and drying, but variety, ripeness, handling and roasting also affect the cup.

Compare coffee processesSource: National Coffee Association — Coffee Processes

Is Arabica a coffee variety?

Arabica is a species, Coffea arabica. Bourbon, Typica, and many other named lines are varieties within that species. A variety name can help explain agronomic traits, but it cannot identify a farm or establish that a particular lot tastes a certain way.

Why this matters: Growing environment, plant health and postharvest decisions matter alongside genetics.

Understand coffee geneticsSource: World Coffee Research — Arabica catalog

Is dark roast stronger than light roast?

Dark roast can taste more bitter or intensely roasted, but that does not by itself mean it contains more caffeine. Roast color labels are not uniform across companies. Compare the same coffee brewed at the same dose before attributing flavor or strength to roast alone.

Why this matters: Roast degree affects flavor, while brewing dose and recipe affect the concentration in your cup.

Read the roasting guideSource: National Coffee Association — Coffee Roasts

How should I store whole-bean coffee?

Keep beans in an airtight, opaque container in a cool, dry, dark place, away from moisture and heat. Grind just before brewing when practical. Freshness depends on the roast, packaging and how the coffee has been stored; a single universal peak-freshness date is not reliable for every bag.

Why this matters: Air, light, warmth and moisture all speed flavor loss or create storage problems.

Explore brewing methodsSource: National Coffee Association — Storage and Shelf Life

Can one tasting score prove which coffee is best?

No. A score reflects a particular evaluation method, sample and taster or panel. The Specialty Coffee Association distinguishes sensory descriptions, judgments of quality, physical characteristics and information such as origin traceability. We publish our own scores only for coffees actually brewed and reviewed by us.

Why this matters: A competition result, a roaster's flavor description and an independent tasting score answer different questions; they should not be converted into one universal ranking.

How we research and rate coffeeSource: Specialty Coffee Association — Coffee Value Assessment

Research update · Genetics

Is Pink Bourbon actually a Bourbon?

Genetic tests reported by Cafe Imports in 2017 and 2023 indicate that sampled Pink Bourbon material belongs closer to Ethiopian landrace ancestry than the traditional Bourbon variety. The older Red × Yellow Bourbon origin story should not be repeated as established fact.

A farmer or roaster may use Pink Bourbon as the trade name for a pink-cherry coffee; a name and cherry color do not prove genetic parentage. Some tested samples had mixed markers, so the identity of any particular lot still needs evidence.

Read the corrected comparisonSource: Cafe Imports — Pink Bourbon genetics report (2023)

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ROASTINGAnswer

How does roast level affect acidity?

Roast level dictates acidity by controlling the thermal degradation of organic acids. As roasting progresses, heat breaks down the volatile acids—such as citric and malic—that provide bright, fruit-forward notes. Simultaneously, the Maillard reaction and caramelization produce bitter compounds like caffeoylquinic acid lactones. Consequently, lighter roasts preserve the bean's inherent acidic profile, while darker roasts mask these delicate compounds with increased bitterness, body, and carbonized flavors, effectively reducing the perceived acidity in the final cup.

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Does dark roast have more caffeine than light roast?

Dark roast does not have more caffeine than light roast; in fact, the difference is negligible. Caffeine is a highly stable compound that remains largely unaffected by standard roasting temperatures. Any perceived difference in "strength" is a result of how you measure your coffee. Because dark roast beans are less dense and lose more moisture during roasting, they weigh less than light roast beans. If you measure by volume (scoops), you may inadvertently use more or less coffee, which dictates your final caffeine intake.

ROASTINGLight roastDark roast
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ROASTINGAnswer

What is the difference between first and second crack in roasting?

First crack is an audible popping sound caused by the rapid release of steam and CO2 as internal pressure ruptures the bean's cell walls, marking the transition to drinkable, light-roast coffee. Second crack is a sharper, more rapid, and quieter sound occurring at higher temperatures, signaling the structural breakdown of the bean's cellulose matrix. While first crack initiates the development phase, second crack indicates the onset of dark roasting, where carbonization and oil migration begin to obscure the bean's inherent origin characteristics.

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Why do roasters use different roast profiles?

Roasters use different roast profiles to highlight the unique characteristics of a specific coffee bean. By controlling variables like temperature, airflow, and time, a roaster can manipulate the chemical reactions—such as the Maillard reaction—to emphasize acidity, sweetness, or body. A profile is essentially a roadmap that ensures consistency and brings out the best flavor potential in every batch.

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Why does my coffee taste grassy or vegetal?

Coffee that tastes grassy or vegetal is typically the result of an underdeveloped roast. This happens when the beans have not been roasted long enough or with enough heat to fully break down the raw, plant-like compounds inside. The coffee essentially remains 'green' at its core, failing to develop the sweet, caramelized flavors expected from a properly roasted bean.

ROASTINGLight roastTypica
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What happens to coffee beans during the roasting process?

During roasting, coffee beans undergo profound chemical and physical changes. Heat triggers the Maillard reaction and caramelization, which transform raw, grassy compounds into complex sugars, acids, and aromatic oils. The beans also lose moisture, expand in size, and develop their characteristic brown color, ultimately creating the flavor profile that defines your cup of coffee.

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Does roasting create flavor or reveal it?

Roasting both creates and reveals flavor. It reveals the inherent potential of the green bean—its origin, variety, and processing—while simultaneously creating new flavor compounds through chemical reactions like the Maillard reaction. A great roast is a balance: it highlights the unique characteristics of the bean while developing the sweetness and body that make coffee enjoyable.

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How does roasting time affect coffee flavor?

Roasting time significantly alters coffee flavor by determining how much the bean's internal structure develops. Shorter roast times often preserve the bean's inherent acidity and floral notes, while longer roast times break down those delicate compounds, replacing them with deeper, caramelized sugars, chocolatey notes, and eventually, the smoky, bitter characteristics of a dark roast.

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What is the difference between city and full city roast?

The difference between City and Full City roasts lies in the degree of development. A City roast is a light-to-medium roast stopped shortly after the first crack, highlighting the bean's origin characteristics. A Full City roast is a medium-dark roast taken further toward the second crack, emphasizing caramelized sweetness and body over the bean's original acidity.

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What is a medium roast coffee?

Medium roast coffee is a balanced roast profile that sits between light and dark roasts, typically roasted to internal temperatures of 400–430°F. It offers a harmonious blend of the bean's inherent origin characteristics—such as floral or fruity notes—and the caramelized sweetness developed during the coffee roasting process, resulting in a smooth, approachable cup with a medium body.

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What is a light roast coffee?

A light roast is a coffee bean roasted for a shorter duration, typically stopped shortly after the first crack. This roast profile preserves the unique characteristics of the coffee's origin, resulting in higher acidity, a lighter body, and complex, nuanced flavors that highlight the bean's terroir rather than the flavors imparted by the roasting process itself.

ROASTINGLight roastTypica
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What is the role of heat in coffee roasting?

Heat is the fundamental energy source in coffee roasting, driving the chemical and physical changes that transform raw, green coffee into aromatic beans. Through conduction, convection, and radiation, thermal energy triggers reactions like the Maillard reaction and caramelization, which develop the coffee's flavor, aroma, and color while reducing moisture content and expanding the bean's structure.

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What is a dark roast coffee?

A dark roast coffee is a bean that has been roasted until it reaches a deep brown color, often with an oily surface. This roast level is characterized by a bold, intense flavor profile with low acidity and notes of chocolate, smoke, or caramel, as the roasting process masks the bean's original origin characteristics.

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How do I roast coffee at home?

To roast coffee at home, you need green coffee beans and a heat source, such as a dedicated home coffee roaster, a popcorn popper, or a heavy skillet. The process involves applying heat to the beans until they reach your desired roast level, listening for the 'first crack' sound, and cooling them quickly to stop the roasting process.

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How do roasters create a roast profile?

A roast profile is created by documenting the specific temperatures, timings, and airflow settings used during coffee roasting to achieve a desired flavor. Roasters use roasting software to track these variables in real time, allowing them to iterate on their approach, cup the results, and refine the process until the coffee development perfectly highlights the bean's unique characteristics.

ROASTINGSpecialty coffeeLight roast
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Why does roasted coffee lose flavor over time?

Roasted coffee loses flavor primarily due to oxidation and the loss of volatile aromatic compounds. Once exposed to oxygen, the oils in the beans begin to degrade, leading to stale coffee. Additionally, the carbon dioxide trapped inside the beans during roasting gradually escapes, taking many of the delicate flavor notes with it, which significantly reduces the coffee's shelf life.

ROASTINGOrganicFreshness & storage
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What is an Italian roast?

An Italian roast is a very dark roast level characterized by an intense, bold flavor and a shiny, oily surface on the beans. During this roasting process, the beans are heated well past the second crack, which significantly reduces the coffee's original acidity and origin characteristics, replacing them with deep, smoky, and sometimes bitter notes.

ROASTINGBitternessDark roast
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What is the difference between air roasting and drum roasting?

The primary difference between air roasting and drum roasting lies in heat transfer. Air roasting, or fluid bed roasting, uses a high-velocity stream of hot air to suspend and heat beans, while drum roasting relies on beans tumbling inside a heated metal cylinder. These distinct roasting methods significantly influence the final flavor profile, consistency, and body of your coffee.

ROASTINGSpecialty coffeeLight roast
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What is the second crack in coffee roasting?

The second crack is a distinct audible stage in the coffee roasting process that occurs after the first crack, signaling that the bean is entering a dark roast profile. It is caused by the breakdown of the bean's cellular structure and the combustion of internal oils, resulting in a smoky, oily, and significantly darker coffee bean.

ROASTINGBitternessDark roast
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How does bean density affect roasting?

Bean density is a critical variable in roasting because it dictates how much heat a coffee bean can absorb and how quickly it develops. High-density beans, often grown at high altitudes, require more heat energy to roast evenly, while lower-density beans are more porous and can scorch easily if the roast profile is not adjusted.

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Why do coffee beans change color when roasted?

Coffee beans change color during roasting primarily due to the Maillard reaction and caramelization. As heat is applied, amino acids and sugars in the bean react to create new compounds, turning the bean from green to yellow, then brown. Further roasting leads to carbonization, which darkens the bean to deep brown or black.

ROASTINGBitternessOrganic
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What is a French roast?

A French roast is a very dark roast level where the coffee beans are roasted until they are nearly black and have a shiny, oily surface. This roast style is characterized by a heavy body, low acidity, and intense, smoky, and bittersweet flavors, as the bean's original origin characteristics are largely replaced by the flavor of the roast.

ROASTINGBitternessDark roast
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What is the first crack in coffee roasting?

First crack is an audible, pivotal stage in the coffee roasting process occurring around 196°C, where internal pressure from steam and carbon dioxide causes the bean to expand and fracture. This exothermic transition marks the beginning of roast development, where the bean shifts from absorbing heat to releasing energy, signaling that the coffee is becoming palatable and ready for light roast profiles.

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What is the Maillard reaction?

The Maillard reaction is a chemical reaction between amino acids and reducing sugars that occurs when coffee beans are heated during roasting. It is the primary driver of flavor development, responsible for creating the complex aromatic compounds, browning, and savory notes that define the character of roasted coffee.

ROASTINGOrganicLight roast
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Why do coffee beans turn brown?

Coffee beans turn brown during the roasting process due to complex chemical reactions, primarily the Maillard reaction and caramelization. As heat is applied, the sugars and amino acids within the green coffee bean break down and reorganize, creating new aromatic compounds and pigments that transform the raw, pale green seed into the familiar brown roasted bean.

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What is the first crack?

The first crack is a pivotal stage in the coffee roasting process where beans audibly pop as internal steam and carbon dioxide escape. Occurring typically between 380°F and 400°F (193°C–204°C), this expansion marks the point where coffee becomes drinkable. It is a primary reference point for roasters to determine roast levels and preserve the bean's unique origin characteristics.

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What is a city roast?

A City roast is a light-to-medium coffee roast level typically stopped during or immediately after the first crack. This roasting profile is designed to highlight the unique, inherent characteristics of the coffee bean, such as its acidity and origin-specific flavors, rather than the flavors imparted by the roasting process itself.

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What is a full city roast?

A Full City roast is a medium-dark coffee roast level that is taken just to the edge of the second crack. This roasting profile balances the bean's original characteristics with the deeper, sweeter flavors developed during the roasting process, resulting in a cup with more body, lower acidity, and notes of chocolate or caramel.

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What is the difference between air and drum roasting?

The primary difference between air and drum roasting lies in how heat is transferred to the beans. Drum roasters use conductive heat through a rotating metal cylinder, while air roasters (fluid bed) use convection, suspending beans in a stream of hot air. This results in different flavor profiles, with air roasting often producing cleaner, brighter cups.

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Why is roasting important?

Roasting is the essential process that transforms raw, green coffee seeds into the aromatic, flavorful beans we use for brewing. Through the application of heat, roasting triggers complex chemical reactions—such as the Maillard reaction and caramelization—that develop the coffee's unique flavor, acidity, body, and aroma, making it palatable and soluble.

ROASTINGOrganicAcidity
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What is the role of heat in roasting?

Heat is the primary energy source in roasting, driving the chemical reactions that transform raw green coffee into flavorful beans. It controls the rate of moisture loss, the development of sugars through caramelization, and the Maillard reaction, which creates the complex aromatic compounds that define the coffee's final flavor profile.

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What is the second crack?

The second crack is an audible, rapid series of popping sounds that occurs during the coffee roasting process, typically between 224°C and 230°C. It signals the structural breakdown of the bean's cell walls and the migration of oils to the surface, marking the transition into dark roast territory where roast-driven flavors begin to dominate.

ROASTINGBitternessLight roast
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How do I know when coffee is roasted?

You know coffee is roasted by monitoring audible cues, color changes, and the development of surface oils. The process begins with the 'first crack'—a popping sound indicating the beans are drinkable—and progresses through color changes from light brown to dark. Experienced roasters use these sensory markers and timing to achieve their desired roast level.

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How do I cool roasted coffee?

To cool roasted coffee, you must move the beans into a cooling tray or bin immediately after they leave the roaster and agitate them while forcing cool air through the batch. This rapid cooling process is essential to halt the roasting reaction, preventing the beans from overcooking and developing off-flavors or a burnt taste.

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How does roasting affect caffeine?

Roasting has a negligible effect on the total caffeine content of coffee beans. While the beans lose mass and volume during the roasting process, the caffeine molecule itself is highly stable and heat-resistant. Therefore, the caffeine content remains relatively consistent by weight, though dark roasts may have slightly less caffeine by volume due to the beans expanding more.

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How long should I roast coffee beans?

The duration of a coffee roast typically ranges from 8 to 15 minutes, depending on the roaster type, batch size, and desired roast level. A shorter roast time often preserves bright, acidic flavors, while a longer roast time develops more body and sweetness. The goal is to reach the desired development stage without burning the beans.

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What is a roast profile?

A roast profile is a detailed record of the temperature and time settings used during the coffee roasting process. It tracks the bean's development from the initial heat application through the first and second cracks. Roasters use these profiles to ensure consistency, replicate successful batches, and fine-tune the flavor characteristics of their coffee.

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What is the difference between medium roast and dark roast?

The primary difference between medium roast and dark roast lies in the duration and temperature of the roasting process. Medium roasts are stopped after the first crack, preserving more of the bean's original origin characteristics and acidity. Dark roasts are roasted longer, past the second crack, which emphasizes the flavors of the roasting process itself, resulting in lower acidity and a heavier, oilier body.

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Why are some coffee beans oily?

Coffee beans become oily due to the roasting process, specifically when they are roasted to a dark level. As the beans are exposed to high heat for longer periods, their cellular structure breaks down, allowing internal oils to migrate to the surface. This is a natural occurrence in dark roasts and is often used as a visual indicator of the roast level.

ROASTINGOrganicDark roast
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What is the difference between light, medium, and dark roast?

The difference between light, medium, and dark roast is the amount of time and heat applied during the roasting process. Light roasts preserve the bean's original origin characteristics and acidity. Medium roasts balance origin flavors with caramelization. Dark roasts emphasize the flavors of the roasting process itself, resulting in lower acidity, a heavier body, and a smoky, bold profile.

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What is the difference between light roast and dark roast caffeine?

The difference in caffeine content between light and dark roast is negligible when measured by weight, as caffeine is highly stable during the roasting process. While light roast beans are slightly denser and may contain marginally more caffeine by weight, dark roast beans are less dense, meaning you might use more beans by volume to reach the same weight, potentially balancing the levels.

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What is the difference between light roast and medium roast?

The difference between light and medium roast is the duration and temperature of the roasting process. Light roasts are stopped near the first crack, preserving the bean's original acidity and floral notes. Medium roasts are pushed slightly further, balancing that acidity with more caramelization and body, resulting in a sweeter, more rounded flavor profile.

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What is the Maillard reaction in coffee roasting?

The Maillard reaction is a fundamental chemical process during coffee roasting where amino acids and reducing sugars react under heat to create complex flavor compounds and browning. This reaction is responsible for developing the savory, nutty, and toasted notes in coffee, occurring primarily during the middle stages of the roast before the beans reach the first crack.

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Are flavor notes on coffee bags artificial?

No, flavor notes on coffee bags are not artificial; they are descriptive terms used by roasters to help you identify the inherent characteristics of the coffee. These notes reflect the natural flavors—such as fruit, chocolate, or spices—created by the bean's variety, terroir, and the processing method, and they are typically identified through a process called cupping.

ROASTINGSpecialty coffeeCupping
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Why do some coffee beans look oily?

Coffee beans look oily because the roasting process has broken down the bean's cellular structure enough to allow internal oils to migrate to the surface. This is a hallmark of dark roasts, where the beans have been roasted for a longer duration or at higher temperatures, causing the oils to escape the interior and coat the exterior of the bean.

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Does roasting coffee remove caffeine?

Roasting coffee does not significantly remove caffeine. While the roasting process causes beans to lose mass and volume, caffeine is a highly stable molecule that remains largely intact throughout the heat application. Consequently, the caffeine content of coffee is determined more by the bean variety and the amount of coffee used during brewing than by the roast level.

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Why does light roast coffee taste more acidic?

Light roast coffee tastes more acidic because shorter roasting times preserve the volatile organic acids—like chlorogenic and quinic acids—present in the raw green bean. These acids provide the bright, fruit-like, and vibrant flavor profiles characteristic of high-quality coffee. In contrast, longer roasting profiles break down these compounds, mellowing the acidity and favoring deeper, roast-driven flavors.

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Why do dark roasts taste oily?

Dark roasts taste oily because the extended roasting process breaks down the bean's internal cellular structure, forcing natural coffee oils to migrate to the bean surface. This oil migration is a hallmark of dark roast development. While these oils contribute to a heavier body and bold flavor, they can also lead to faster staling if the coffee freshness is not carefully managed after roasting.

ROASTINGBitternessDark roast
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Does dark roast have more caffeine?

Contrary to popular belief, dark roast does not have more caffeine than light roast; in fact, the two are remarkably similar in caffeine density by weight. Because caffeine is stable during the roasting process, the levels remain consistent. However, because dark roast beans are less dense, light roast coffee may contain slightly more caffeine if measured by the scoop rather than by weight.

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Can you roast coffee at home?

Yes, you can roast coffee at home with equipment ranging from simple stovetop pans to dedicated air roasters or drum roasters. Home roasting allows you to control the freshness and flavor development of your coffee by using green coffee beans. It is a rewarding hobby that lets you tailor roast levels to your exact preferences, provided you have proper ventilation.

ROASTINGMoka potFreshness & storage
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How does roasting change coffee flavor?

Roasting transforms green, flavorless coffee seeds into aromatic, flavorful beans through heat-induced chemical reactions, primarily the Maillard reaction and caramelization. These processes break down acids, develop sugars, and create hundreds of volatile aroma compounds, determining whether a coffee tastes bright and acidic or deep and chocolatey.

ROASTINGOrganicAcidity
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Do darker roasts have more caffeine?

No, darker roasts do not have more caffeine than lighter roasts. In fact, caffeine content is remarkably stable during the roasting process. Because darker roasts are less dense and lose more mass during roasting, they may actually contain slightly less caffeine by volume than lighter roasts, though the difference is often negligible in a standard cup.

ROASTINGLight roastBitterness
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Does roast level change the caffeine content?

Roast level has a negligible impact on the total caffeine content of coffee beans. While the roasting process causes beans to lose mass and volume, the caffeine molecule itself is highly heat-stable. Any perceived difference in caffeine levels between light and dark roasts is usually due to how the coffee is measured—by volume versus by weight—rather than the roasting process itself.

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How does roasting change the flavor of coffee?

Roasting transforms raw, green coffee seeds into aromatic, flavorful coffee through complex chemical changes, primarily the Maillard reaction and caramelization. These processes break down internal sugars and proteins, developing sweetness, body, and acidity while reducing raw, grassy notes. The degree of roasting dictates the final profile, balancing origin-specific characteristics with roaster-induced flavors like chocolate, toast, or smoke.

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Why does dark roast coffee taste oily?

Dark roast coffee tastes oily because the intense heat used during the roasting process breaks down the bean's internal structure and draws the natural coffee oils to the surface. As the bean expands and the cellular walls weaken, these oils migrate outwards, creating the characteristic sheen seen on dark roast beans. This oil is also highly susceptible to oxidation, which can lead to stale flavors over time.

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Can you roast coffee in a pan?

Yes, you can roast coffee in a pan at home, though it is one of the most challenging methods to master. Pan roasting offers a hands-on, DIY approach to coffee roasting that requires constant agitation to prevent burning. While it lacks the precision of professional equipment, it is an accessible way to learn about the roasting process and the physical changes coffee beans undergo.

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ROASTINGCoffee 101

What is Roasting Energy Efficiency?

Roasting energy efficiency refers to the optimization of heat application during the coffee roasting process to minimize fuel consumption while maintaining consistent, high-quality roast profiles and desired flavor development.

RoastRoasting
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What is Profile Replication?

Profile replication is the process of consistently reproducing a specific roast curve across multiple batches to ensure that the flavor, aroma, and quality of the coffee remain identical every time it is roasted.

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What is Bean Expansion Ratio?

Bean expansion ratio is a measure of the physical increase in volume of coffee beans during the roasting process, which serves as a key indicator of roast development and internal bean structure.

Roast
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ROASTINGCoffee 101

What is CGA Degradation in Roasting?

CGA degradation in roasting refers to the chemical breakdown of chlorogenic acids into lactones and other compounds, a process that significantly influences the bitterness, acidity, and overall flavor profile of roasted coffee.

RoastAcidity
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What is Turning Point?

The turning point is the lowest temperature recorded by the bean probe after green coffee is charged into the roaster, marking the moment the beans stop losing heat and begin to rise in temperature.

RoastRoasting
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ROASTINGCoffee 101

What is Charge Temperature?

Charge temperature is the initial temperature of the roasting drum at the moment green coffee beans are added, serving as the starting point for the roast and influencing the initial heat transfer rate.

RoastRoasting
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ROASTINGCoffee 101

What is Rate of Rise?

Rate of Rise (RoR) is a measurement of how quickly the bean temperature is changing during the roasting process, typically expressed in degrees per minute, and is used to control the development of flavor.

RoastRoasting
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ROASTINGCoffee 101

What is Drop Temperature?

Drop temperature is the final temperature of the coffee beans at the moment they are released from the roaster into the cooling tray, marking the end of the roasting process.

RoastEspressoRoasting
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ROASTINGCoffee 101

What is Roast Curve?

A roast curve is a graphical representation of bean temperature over time during the roasting process, used by roasters to monitor, replicate, and analyze the progression of heat through the coffee beans.

Roast
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What is Browning Phase?

The browning phase is the stage of coffee roasting occurring between the yellowing of the beans and the first crack, where the Maillard reaction develops complex aromas, flavors, and the characteristic brown color of roasted coffee.

Roast
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ROASTINGCoffee 101

What is Yellowing Phase?

The yellowing phase is the stage in coffee roasting following the drying phase, where the beans turn from green to yellow, signaling the beginning of the Maillard reaction and the development of early aromatic compounds.

RoastRoasting
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ROASTINGCoffee 101

What is Caramelization?

Caramelization is the pyrolysis of sugars that occurs during the later stages of coffee roasting, contributing to the development of sweetness, body, and rich, dark-sugar flavor notes as the beans reach higher temperatures.

RoastDark roastEspresso
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ROASTINGCoffee 101

What is Drying Phase?

The drying phase is the initial stage of coffee roasting, where the roaster applies heat to evaporate moisture from the green beans, preparing them for the subsequent chemical reactions that develop flavor and aroma.

RoastRoasting
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ROASTINGCoffee 101

What is Development Time Ratio?

Development Time Ratio (DTR) is a roasting metric calculated as the percentage of total roast time that occurs after the first crack, used by roasters to ensure consistency and control over the coffee's final flavor profile.

Roast
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ROASTINGCoffee 101

What is Maillard Reaction?

The Maillard reaction is a chemical reaction between amino acids and reducing sugars that occurs during coffee roasting, responsible for creating hundreds of complex aromatic compounds, browning the beans, and developing essential flavor profiles.

Roast
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ROASTINGCoffee 101

What is Roast Development?

Roast development refers to the final phase of the roasting process, starting from the first crack, where the roaster manages the chemical reactions that determine the coffee's final balance of acidity, sweetness, and body.

Roast
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ROASTINGCoffee 101

What is Second Crack?

Second crack is an audible stage in coffee roasting occurring at higher temperatures, characterized by the fracturing of the bean's cellular structure, which signals the transition into dark roast profiles and the onset of oil migration.

RoastDark roast
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ROASTINGCoffee 101

What is Scandinavian Roast?

Scandinavian roast is a very light coffee roast style characterized by short roast times and low final temperatures, intended to preserve the delicate, origin-specific acidity and floral aromatics inherent in high-quality specialty coffee beans.

RoastLight roast
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ROASTINGCoffee 101

What is Italian Roast?

Italian Roast is an extremely dark, intense coffee roast that goes well beyond the second crack, resulting in a very oily, smoky, and charred flavor profile with minimal acidity and heavy body.

RoastDark roastEspresso
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What is French Roast?

French Roast is a dark, intense coffee roast characterized by a shiny, oily surface and a bittersweet, smoky flavor profile that emerges after the beans have been roasted well into the second crack.

RoastDark roast
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What is City Plus Roast?

City Plus Roast is a medium roast level that extends slightly beyond the City Roast, offering a more balanced profile with increased body and caramelization while still avoiding the oils of a dark roast.

Roast
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What is Viennese Roast?

Viennese Roast is a dark roast level that goes well into the second crack, resulting in a shiny, oily bean with a bittersweet, chocolatey flavor and a significant reduction in origin-specific acidity.

RoastDark roastRoasting
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What is City Roast?

City Roast is a medium-light roast level that concludes shortly after the first crack, preserving the bean's inherent origin characteristics while developing a balanced, mild sweetness and a light brown color.

RoastLight roastSingle origin
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What is Full City Plus Roast?

Full City Plus Roast is a dark-leaning medium roast that pushes further into the second crack, creating a bold, low-acid cup with prominent oils and deep, caramelized, or bittersweet chocolate flavor notes.

RoastRoastingDark roast
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What is Spanish Roast?

Spanish Roast is an exceptionally dark, intense roast level, often darker than Italian, characterized by a charred, smoky flavor and a very oily surface, typically used for specific traditional coffee preparations.

RoastDark roast
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What is Full City Roast?

Full City Roast is a medium-dark roast level stopped just as the second crack begins, resulting in a bean with slight surface oils and a flavor profile dominated by chocolate, nuts, and reduced acidity.

RoastEspressoRoasting
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What is Scorching?

Scorching is a roasting defect characterized by dark, burnt spots on the flat sides of coffee beans, caused by excessive heat transfer from the drum surface during the early stages of the roast.

RoastRoasting
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What is Cinnamon Roast?

A cinnamon roast is a very light roast level, stopped just after the first crack, resulting in a light brown color, high acidity, and a distinctively grassy or grain-like flavor profile.

RoastLight roast
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What is New England Roast?

A New England roast is a light-to-medium roast level that is stopped shortly after the first crack, resulting in a light brown color and a cup that highlights the coffee's natural acidity and origin character.

RoastLight roastRoasting
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What is Dark Roast?

A dark roast is a coffee roasting style where beans are roasted past the second crack, resulting in a dark brown color, oily surface, and a flavor profile dominated by bitterness, roastiness, and low acidity.

RoastRoastingEspresso
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What is American Roast?

An American roast is a medium roast level, typically stopped between the first and second crack, resulting in a medium brown color and a balanced profile that bridges acidity and sweetness.

RoastMedium roast
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What is Post-Roast Density?

Post-roast density refers to the physical mass per unit volume of coffee beans after they have been roasted, which is influenced by the degree of roast and the bean's initial structural integrity.

RoastRoasting
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What is Charge Weight?

Charge weight is the specific mass of green coffee beans loaded into a roaster at the beginning of a batch, which significantly influences the thermal dynamics and overall roast profile of the coffee.

RoastRoasting
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What is Probe Placement?

Probe placement refers to the strategic positioning of temperature sensors within a coffee roaster to ensure accurate, representative readings of either the bean mass or the environmental air temperature during the roast.

Roast
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What is Baked Coffee?

Baked coffee is a roasting defect characterized by a flat, dull, or papery flavor, caused by a roast that has stalled or lacked sufficient heat development, resulting in a loss of vibrant acidity and sweetness.

RoastRoasting
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What is Bean Thermocouple?

A bean thermocouple is a temperature-sensing probe inserted into the roasting drum to measure the internal temperature of the coffee beans throughout the roasting process, providing essential data for profile management.

Roast
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What is Roasting Weight Loss?

Roasting weight loss is the percentage of mass a batch of coffee loses during the roasting process, primarily due to the evaporation of moisture and the release of gases as the beans develop.

Roast
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What is Conduction vs Convection?

Conduction vs convection refers to the two primary methods of heat transfer in coffee roasting: conduction involves direct contact with hot surfaces, while convection utilizes circulating hot air to heat the beans.

RoastRoasting
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What is Roasting Defects?

Roasting defects are undesirable physical or sensory characteristics in coffee caused by improper heat application, airflow, or timing during the roasting process, resulting in poor flavor quality and inconsistent results.

Roast
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What is Pre-Roast Blending?

Pre-roast blending is the practice of mixing different green coffee beans together before they are roasted, allowing the various origins to undergo the roasting process simultaneously to achieve a unified flavor profile.

Roast
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