Coffee processing
See which processes keep showing up in coffees you love.
Compare washed, natural, honey, anaerobic, and other methods—then track what you try and which ones earn your best ratings.
15 ways processing can shape a coffee
Open a method for its production steps, expected cup impact, common regions, advantages, challenges, and subtypes.
Washed
HighCoffee cherries are pulped to remove the fruit, then fermented in water to remove mucilage, washed, and dried. Most common method globally.
Natural
MinimalWhole coffee cherries are dried intact with all fruit layers, then hulled. The oldest processing method.
Honey
Medium to LowSkin and pulp removed, but mucilage (honey layer) left on during drying. Named for sticky mucilage, not actual honey.
Anaerobic Natural
LowWhole cherries fermented in sealed, oxygen-free tanks before drying. Creates unique flavors.
Anaerobic Washed
Medium to HighDepulped coffee fermented in sealed tanks without oxygen, then washed and dried.
Carbonic Maceration
VariableWine-making technique adapted for coffee. Whole cherries in CO2-rich environment. Fermentation occurs inside the cherry.
Wet Hulled
MediumIndonesian method. Parchment removed while beans still wet (~50% moisture), then dried. Creates distinctive flavor.
Lactic Fermentation
MediumControlled fermentation to encourage lactic acid bacteria growth, similar to yogurt or sourdough fermentation.
Extended Fermentation
MediumStandard processes but with significantly longer fermentation times (48+ hours instead of 12-24).
Co-ferment
MediumCoffee fermented with other fruits, yeasts, or ingredients to impart flavors.
Thermal Shock
HighRapid temperature changes during processing to affect fermentation and flavor development.
Monsooned
Low (uses environmental moisture)Unique to India. Beans exposed to monsoon winds and humidity, causing them to swell and change color/flavor.
Double Fermentation
Medium to HighCoffee fermented twice - once with cherry intact or with mucilage, then again after depulping/washing.
Aerobic Fermentation
Medium to HighFermentation in open tanks with oxygen present, but with controlled conditions (temperature, pH, time).
Semi-Washed
Medium (less than fully washed)Pulped coffee has mucilage mechanically removed instead of through fermentation.