How do I make cold brew coffee at home?

Making cold brew at home is one of the most accessible entry points into home brewing because it requires no specialized machinery. At its core, cold brew is an immersion brewing method that relies on time rather than temperature to extract flavor. Because you are not using heat to accelerate the process, you must compensate with a significantly longer contact time—typically between 12 and 24 hours—and a coarse grind size to prevent over-extraction and bitterness.

The fundamental difference between cold brew and iced coffee lies in the thermal energy applied during extraction. Iced coffee is brewed hot, which rapidly pulls out acids and oils, and is then cooled. Cold brew, by contrast, remains at room temperature throughout the entire process. This lack of heat changes the chemical profile of the final cup, often resulting in lower perceived acidity and a heavier, creamier body that many drinkers find naturally sweeter.

In practice, you can use a simple mason jar, a French press, or a dedicated cold brew pitcher. A common starting ratio is 1:4 or 1:5 (coffee to water by weight), which creates a potent concentrate. Once the steeping time is complete, you must filter the grounds thoroughly using a fine-mesh sieve, a paper filter, or a cloth filter to ensure a clean mouthfeel. The resulting concentrate can be stored in the refrigerator for up to a week.

When you are ready to serve, treat the concentrate as a base. Most people dilute it with water, milk, or ice at a ratio of 1:1 or 1:2, depending on how strong you prefer your coffee. Because the concentrate is shelf-stable in the fridge for several days, it is an excellent way to prepare for a busy week, allowing you to craft a quick, refreshing beverage on demand without the need for a morning brew cycle.