The Coffee Expert

The definitive guide from seed to cup

Coffee Processing Methods

The bridge between agriculture and flavor — how the same cherry becomes radically different cups

Washed (Wet)

The gold standard for terroir expression and clarity

Steps:

  1. Cherry sorting via float tanks
  2. Depulping within 8-12 hours
  3. Fermentation in tanks (12-72h)
  4. Washing in channels
  5. Drying on raised beds to 10-12%
  6. Resting 30-60 days in parchment

Flavors: Bright acidity, Clean, Terroir-forward, Floral, Citrus

Best for: High-altitude coffees, Gesha, SL28/SL34, Bourbon

Acidity: 5/5 | Body: 2/5 | Sweetness: 3/5 | Complexity: 4/5 | Clarity: 5/5 | Risk: Low

Natural (Dry)

The oldest method — maximum fruit influence

Steps:

  1. Cherry sorting by hand/flotation
  2. Whole cherry drying on raised beds (2-4 weeks)
  3. Turn every 30-60 min during day
  4. Fermentation inside intact cherry
  5. Hulling once dried to 10-12%

Flavors: Blueberry, Strawberry, Wine, Tropical, Jammy, Full body

Best for: Ethiopian Harrar/Guji, Brazilian, some Colombian

Acidity: 2/5 | Body: 5/5 | Sweetness: 5/5 | Complexity: 3/5 | Clarity: 2/5 | Risk: High

Honey

The spectrum between washed and natural

Steps:

  1. Depulping (skin removed)
  2. Controlled mucilage retention (10-100%)
  3. Drying on raised beds with mucilage
  4. No fermentation tank, no washing
  5. Hulling after reaching 10-12%

Flavors: Sweet, Clean fruit, Honey, Balanced, Stone fruit

Best for: Costa Rica (pioneers), El Salvador, Guatemala

Acidity: 3/5 | Body: 4/5 | Sweetness: 4/5 | Complexity: 3/5 | Clarity: 3/5 | Risk: Medium

Anaerobic

Controlled fermentation in sealed, oxygen-free environments

Steps:

  1. Depulping or whole cherry
  2. Sealed airtight stainless steel tanks
  3. CO2 purge for anaerobic conditions
  4. Controlled fermentation (18-28°C, 48-240+ hours)
  5. pH and Brix monitoring throughout
  6. Drying on raised beds

Flavors: Intense fruit, Candy-like, Wine, Buttery, Explosive aroma

Best for: Competition lots, experimental producers

Acidity: 3/5 | Body: 4/5 | Sweetness: 5/5 | Complexity: 5/5 | Clarity: 4/5 | Risk: Medium-High

Carbonic Maceration

Borrowed from winemaking — intracellular fermentation

Steps:

  1. Whole intact cherries in sealed tank
  2. CO2 injection creates inert atmosphere
  3. Intracellular enzymes break down sugars
  4. Duration 48-120+ hours
  5. Depulp and dry after tank

Flavors: Winey, Candy, Cinnamon, Red wine, Bubble gum, Tropical

Best for: WBC 2024-2025 finalists — competition dominant

Acidity: 3/5 | Body: 4/5 | Sweetness: 5/5 | Complexity: 5/5 | Clarity: 3/5 | Risk: Medium-High