Wet-Hulled Process

The wet-hulled process, known locally in Indonesia as 'giling basah,' is a unique and highly specialized method of coffee processing. Unlike the washed process, where the parchment is removed only after the coffee is fully dried, the wet-hulled process involves removing the parchment while the beans are still at a relatively high moisture content, typically around 30% to 40%. This results in a bean that is exposed to the elements while still 'wet,' which fundamentally alters its development and flavor.

After the coffee cherries are harvested, they are depulped and fermented for a short period. The beans are then partially dried on patios or raised beds for a few days until they reach the desired moisture level. At this point, the parchment is mechanically removed, and the 'wet' green beans are then dried further until they are ready for export. This rapid exposure of the bean to the air while it is still moist is what gives wet-hulled coffee its characteristic profile.

For the coffee drinker, wet-hulled coffee is unmistakable. It is famous for its intense, heavy body, low acidity, and complex, earthy, and spicy flavor notes. These coffees are often described as having a 'funky' or 'wild' character that is highly sought after by those who enjoy a bold, non-traditional cup. It is a profile that is deeply tied to the terroir and the traditional processing methods of Sumatra and Sulawesi.

In practice, the wet-hulled process is a reflection of the challenging climate in Indonesia. The high humidity and frequent rainfall make it difficult to dry coffee to the standard 11-12% moisture level while it is still in the parchment. By hulling the coffee early, producers can speed up the drying process and protect the beans from the risks of mold and over-fermentation. It is a pragmatic, culturally significant method that produces one of the most distinct and recognizable flavor profiles in the specialty coffee world.