What is the difference between wet and dry processing?

Coffee processing is the post-harvest stage where the coffee cherry is transformed into green coffee beans. This stage is arguably as important as the variety or the altitude in determining the final flavor profile. The two most common methods, wet and dry processing, represent fundamentally different approaches to how the bean interacts with the fruit's sugars during drying.

In wet processing, also known as washed coffee, the skin and pulp are removed immediately after harvesting using a machine called a depulper. The beans are then placed in fermentation tanks to break down the remaining sticky mucilage before being washed and dried. Because the bean is separated from the fruit early, the resulting cup is typically clean, bright, and highlights the inherent acidity and terroir of the coffee. It is the standard for many high-end specialty coffees.

Dry processing, or natural coffee, is the oldest method. The entire cherry is left intact and spread out on drying beds or patios to dry in the sun. As the fruit dries, the bean absorbs the sugars and flavors from the pulp. This process often results in a cup with a heavier body, lower acidity, and intense, jammy, or wine-like fruit notes. It requires careful management to prevent fermentation defects, but when done well, it produces some of the most unique and complex coffees in the world.

In practice, the choice of process is often dictated by the local climate and water availability. Wet processing requires significant amounts of water, whereas dry processing is common in arid regions. As a consumer, understanding these differences helps you navigate flavor preferences: if you enjoy clarity and crisp acidity, look for washed coffees; if you prefer sweetness, body, and fruit-forward profiles, look for naturals.