Wet hulling — known locally as giling basah — is a processing method almost exclusive to the Indonesian archipelago. Unlike conventional washed processing where beans dry fully inside their parchment shell, wet hulling removes the parchment while the bean is still at high moisture content (around 30-35%), then finishes drying the bare green bean.
How it works
- Farmers depulp cherries and briefly ferment overnight
- Parchment coffee is partially dried to ~30-35% moisture
- The parchment is mechanically removed (“hulled”) while still damp
- Bare green beans finish drying on patios or tarps
The early parchment removal changes how the bean dries and develops, and the high humidity of Indonesian growing regions makes this approach practical where fully drying in parchment would be difficult.
What to expect in the cup
- Heavy, syrupy body — among the fullest-bodied coffees you’ll find
- Earthy, herbal notes — cedar, tobacco, dark chocolate, mushroom
- Low acidity — muted brightness, smooth mouthfeel
- Spice and wood — sometimes polarizing, always distinctive
Where it’s common
Sumatra, Sulawesi, and Java are the classic wet-hulled origins. The process is deeply tied to the smallholder farming systems of these islands, where coffee passes through multiple intermediaries between farm and export.
