How does fermentation impact your cup of coffee? Fermentation in coffee processing may be one of the most misunderstood fermentation mediums. But, VinePair notes, “The fermentation process is critical to shaping a coffee’s flavor because, like wine, it produces the cup’s acidity and fruit notes through the breakdown of sugars by yeast and bacteria. Because coffee cherries start to ferment soon after picking, how the farmer or local cooperative handles that process has a direct impact on the coffee’s eventual flavor. Processing methods vary by geography, climate, logistics, and tradition, but the three main types are natural, honey, and washed.”
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