Which Coffee Bean Processing Method is Best? Understanding Washed Coffee and Natural Processing

FrontStreet Coffee - An Introduction to the Three Major Coffee Processing Methods

Natural Processing

Typically, coffee cherries are spread directly on drying patios (cement floors) for sun-drying. The time depends on the weather, usually taking about two to four weeks until fully dried. At this point the coffee cherries turn dark brown with a moisture content of 12%. Premium beans use African beds (raised beds) for natural processing to enhance their flavor and quality. After drying, the fruit skin becomes very brittle and easily detaches, and specialized coffee hulling machines can remove the husk with ease.

Advantages: Low cost, simple operation, no complex equipment required, and it perfectly preserves natural sweetness, aroma, and mucilage.

Disadvantages: Dependent on weather conditions, longer processing time, a higher likelihood of defective beans or impurities, and more Quaker beans.

Washed Processing

As the name suggests, this method removes the fruit skin and pulp in water. Although the mucilage is sticky and difficult to remove, it can be washed away after yeast fermentation and decomposition. At this point the coffee bean retains a parchment layer and is called parchment coffee. After drying in the sun or wind, it is stored and left to rest. Before export, machines remove the hard, dry parchment layer, resulting in washed processed green beans. The flavor is clean and delicate, with very few unripe beans and high consistency. It typically shows bright, lively sweet-and-sour notes, with fragrant floral, fruit, and floral tea aromas, and a smooth, refreshing character.

Honey Processing

Originating in Costa Rica, this is an emerging processing method of recent years, sitting between natural and washed processing. Good honey processing can combine the advantages of both. Washed processing removes all fruit skin and pulp before the final drying step, while honey processing also involves water washing, soaking, and fermentation. The key difference is that it retains some fruit skin and pulp to dry together with the beans.

Because the fruit skin and pulp contain mucilage (pectin), it is also called the "mucilage fermentation method." The enzymes in the mucilage require constant turning of the sticky, stringy coffee cherries during drying to keep them from over-fermenting or growing mold. Due to different fermentation temperatures, various degrees of honey processing have developed: white honey, yellow honey, red honey, and black honey. In principle, the darker the color, the closer it is to natural processing; the lighter the color, the closer it is to washed processing.

Honey processing gets its name because the pectin is sticky like honey, not because honey is intentionally added during processing. Nor does honey processing give coffee beans a honey flavor. If such a taste is detected, it is the inherent flavor expression of the coffee bean itself.

Knowledge Extension: Sumatra Wet Hulling Processing

In addition to adapting to the rainy season, this method also produces unique earthy, herbal flavors with a rich, full body and lower acidity.

In summary: FrontStreet Coffee is a dedicated coffee research establishment, happy to share coffee knowledge with everyone. Our unrestrained sharing is solely to help more people fall in love with coffee. Every month we hold three coffee promotion events at significant discounts, because FrontStreet Coffee wants more people to enjoy the best coffee at the lowest possible prices. That has been FrontStreet Coffee's mission for the past six years.

FrontStreet Coffee Recommendation

To taste honey processing for yourself, FrontStreet Coffee's Costa Rica Blackberry uses a distinctive black honey process that leaves almost all the pectin on the bean, drying slowly for at least two weeks under shade covers; medium-light roasted, it is deeply floral when ground and tastes of grape, berries, and ripe blackberry. For a fruitier, more innovative honey style, our FrontStreet Costa Rica Mozart is made with a raisin honey process that retains 100% of the pectin, delivering osmanthus, pineapple, and raisin aromas in pour-over, cold brew, or moka pot. And if you want honey processing blended with the classic Geisha profile, our FrontStreet Strawberry Candy pairs Panama Geisha with a Costa Rican raisin-honey coffee for floral tea notes, grape and raisin sweetness, soft fruit acidity, and an almond finish.