ferment


ferment

Ferment is the sour off flavor, often vinegar-like, that results from several possible problems. It might be the result of seriously over-ripe coffee cherry. It can come from coffee cherry that was not pulped the same day it was picked, and/or was exposed to high heat between picking and processing. Often it comes from poor practices at the wet mill, when coffee is left too long in the fermentation tank, or old coffee that is over-fermented is mixed with new coffee.

See also: Acetic Acid, defect, Fruity, Vinegar, winey