Processing Explainers

Washed Processing —
Clean, Clear & Terroir-First

When you see "washed" on one of our bags, it means the fruit was removed before drying — so origin, variety, and elevation do the talking. Controlled fermentation, thorough washing, careful drying. The most transparent processing style there is.

High clarity Origin-forward Defined acidity Clean sweetness Reliable structure
Step by Step

How Washed Processing Works

Sort & Float

Freshly picked cherries are sorted and floated in water. Underripe, overripe, and defective cherries float to the top and are skimmed off. Only the dense, ripe ones move forward.

Pulp — Skin and Fruit Removed Mechanically

A pulping machine strips the skin and most of the fruit away, leaving the seed (the coffee bean) still wrapped in a thin, sticky layer called mucilage. This is where washed differs from natural — the fruit doesn't dry on the seed.

Ferment — 8 to 36 Hours

The parchment-covered seeds sit in fermentation tanks or on patios. Naturally occurring microorganisms break down the remaining mucilage. Time and temperature are monitored carefully — under-fermented = dense and grassy, over-fermented = vinegary and funky. Good producers taste and adjust. They don't guess.

Wash — Until Squeaky Clean

The fermented seeds are washed in channels or tanks until the parchment feels literally squeaky between your fingers. This removes all remaining mucilage and stops fermentation. It's also when final sorting happens — anything still floating gets pulled.

Dry — Down to 10–12% Moisture

Washed parchment coffee dries on raised beds or patios until it reaches the right moisture level for export. This typically takes 2–4 weeks depending on altitude, humidity, and sun. After drying it rests in parchment, then gets milled before shipping.

How It Tends to Taste

Washed coffees don't taste thin or stripped — done well, they're detailed. The clarity lets origin characteristics come through in ways that naturals and honeys often mask. Here's what to look for in the cup:

ClarityEach flavour note feels distinct and separated rather than blended together. You can follow individual characteristics — floral, fruit, chocolate — rather than one merged impression.
Defined AcidityCitrus, apple, red grape — structured and identifiable, not just vague sharpness. The acidity in a well-processed washed coffee feels like a flavour, not a flaw.
Clean SweetnessCane sugar, light honey, caramel — sweetness that's present but not jammy or ferment-forward. It's a different register than naturals: quieter, more refined.
Medium BodyLess full and syrupy than naturals, more substantial than very light teas. The body lets the flavour sit without weight getting in the way of clarity.

Brewing Washed Coffees

The clarity of washed processing rewards methods that don't add noise. Filter and pour-over let the origin characteristics speak clearly; espresso works well when extraction is even and pressure is controlled. One variable to get right: water quality.

MethodRatioGrindTempNotes
Pour-Over1:15–1:16Medium92–96°CAim for 2:45–3:15 total. Bloom 30s. Clarity is the goal — even, slow pours.
Filter / Batch1:16Medium-coarse92–94°CA washed coffee in a batch brewer is a very honest test of the bean. It'll show everything.
Espresso1:2–1:2.2Fine92–94°CEven extraction is critical — washed acidity that's under-extracted reads sharp. Go slow on the grind adjustment.
French Press1:15Coarse94°C4 min steep. The added body from immersion can suit lighter washed coffees particularly well.
Water quality70–120 ppm as CaCO₃Too soft = harsh acidity. Too hard = flat and dull. Filtered tap is usually fine.

For the full brew guide with every method covered, see Bert's Brew Guide.

Quick Facts

Washed at a Glance

Also called Wet process
Fruit removal Before drying
Ferment time 8–36 hours
Drying time 2–4 weeks
Water use High
Consistency Very high
Common Origin Regions
Colombia · Ethiopia · Kenya · Guatemala · Costa Rica · Honduras · most Central Americans
Processing Methods

Compare the Three

Washed Processing — Common Questions

Is washed coffee "better" than natural or honey?
Not better — different. Washed emphasises clarity and place; naturals and honeys lean into fruit, texture, and fermentation character. We source all three intentionally because they do different things in the cup. The right choice depends on what you're after, not a hierarchy.
Does washing the coffee remove flavour?
No. When picking quality is high and processing is careful, washed coffees are often the most detailed: the fruit-forward noise drops out, and origin characteristics — variety, altitude, soil — stand out clearly. Think of it as turning the volume down on one channel so you can hear the others.
How does fermentation time affect the final cup?
Short, cool, well-managed ferments produce crisp and clean cups. Longer or warmer ferments can add complexity and even mild ferment character — but if unmanaged they produce savory, sour, or vinegary notes. Good producers measure temperature, taste at intervals, and stop at the right moment. The goal is consistency, not luck.
Why do some washed coffees taste acidic in a way that feels unpleasant?
Usually one of three things: under-extraction (pulling the shot or brew too fast), water that's too soft, or a roast that's genuinely too light for the origin. Try a slightly coarser grind, slower pour, or slightly cooler water. If the acidity is still shrill, it might just be that particular coffee isn't your style — and that's fine.
Does washed processing use a lot of water? Is it environmentally responsible?
Traditional washed processing uses significant water, which is a genuine concern in water-stressed regions. Many progressive producers now use eco-pulpers that dramatically reduce water use, and some recirculate wash water. It's an active area of improvement in specialty coffee. When we know a producer's approach, we share it on the product page.
Processing Series

Washed

Clean, clear, terroir-first — you're here.

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Up Next

Natural (Dry)

Dried whole in the cherry — bigger fruit, more complexity, higher stakes.

Read Natural Processing
Also in the Series

Honey / Pulped Natural

The middle method — skin off, some mucilage left. Sweetness with structure.

Read Honey Processing