How Does Natural vs Washed Processing Change Coffee Flavor?
Natural and washed processing push the same Yirgacheffe green beans in opposite directions. Natural lots, dried with the fruit still on the seed, brew sweeter and heavier: fermented wine aroma, honey and cocoa, spice, full body, a long finish. Washed lots, stripped of skin, pulp and mucilage before drying, taste brighter and cleaner, with citric acidity, jasmine in the dry aroma and a black tea aftertaste.
The brewing numbers differ too. Natural Yirgacheffe is often brewed at 15g grounds, 89C water, 1:15 ratio, a 25-second bloom and about 2:12 total. Washed Yirgacheffe runs 92C with a 28-30 second bloom and roughly 2:15. Both share fruity lemon-citrus acidity, the common thread between sun dried coffee beans and washed lots from one region.
The flavor profile of coffee is often foreshadowed during the green bean processing stage. As two of the most classic processing methods, natural and washed give coffee beans from the same region completely different personalities. Taking Front Street Yirgacheffe as an example, this article breaks down in detail the specific differences between natural and washed in brewing parameters, flavor performance, and dry aroma characteristics, and provides a complete introduction to the washed method's process flow and drying requirements. Whether you are a beginner just getting into pour-over or an enthusiast looking to refine your brewing techniques, you will find practical reference information here.
Introduction to coffee bean varieties, estates, origins, and grinding settings for natural and washed flavor processing methods
[Front Street Natural Yirgacheffe]: It is recommended to use 15g of grounds with 89°C water temperature, Fuji Royal grinding setting 4, V60 dripper, water-to-coffee ratio 1:15, first pour 30g, bloom for 25s, second pour 104g then stop, second pour up to 230g total, discard the final drips, extraction time around 2:12s;
[Front Street Washed Yirgacheffe]: It is recommended to use 15g of grounds with 92°C water temperature, water-to-coffee ratio 1:15, V60 dripper, water-to-coffee ratio 1:15, first pour 30g, bloom for 28s-30s, second pour 110g then stop, second pour up to 230g total, discard the final drips, extraction time around 2:15s
Front Street Natural Yirgacheffe: Natural is a bit complex, with a light fermented wine aroma, a heavier bittersweet note, a much richer mouthfeel, honey sweetness, cocoa notes with some spice, a full body, and a long-lasting finish.
Front Street Washed Yirgacheffe: The washed process has brighter acidity, like citric acid, a fresher aroma, more pronounced citrus notes, and some black tea character in the aftertaste.
Similarities: Both have fruity acidity, similar to lemon and citrus fruits
Differences in dry aroma:
Front Street Natural Yirgacheffe: Light fermented wine aroma, spice notes
Front Street Washed Yirgacheffe: Jasmine floral aroma, lemon or lime acidity
[Using a ratio of 8g of grounds to 150ml of 93°C hot water in a cup, let the coffee steep for 3-4 minutes until a crust forms]
Use washing and fermentation methods to remove the skin, pulp, and mucilage. Farms using the washed method must build washing channels and be able to introduce a continuous supply of fresh water. During processing, the fermented beans are placed into the channel and moved back and forth, using the friction of the beans and the force of the flowing water to wash the coffee beans until they are smooth and clean. After washing, at this point, the coffee beans are still wrapped in the parchment layer, with a moisture content of 50%, and must be dried to reduce the moisture content to 12%, otherwise they will continue to ferment and become moldy and spoiled. A better processing method is to use sun drying. Although it takes 1 to 3 weeks, the flavor is especially good and quite popular.
The above content is compiled by CoffeeHunters, a coffee news website.
