What common defect can be found in coffee beans due to poor processing?

• A. A bitter taste
• B. A sour taste from fermentation issues
• C. A floral aroma
• D. A lack of flavor

Answer: (B)

Poor processing of coffee beans often leads to defects that significantly impact the final flavor profile of the brewed coffee. One of the most notable defects is a sour taste, which is typically a result of improper fermentation during the processing stage. When coffee cherries are fermented for too long or under unsuitable conditions, it can lead to the development of off-flavors, including sourness.

When the sugars in the cherries break down improperly due to over-fermentation, acids can build up, giving the coffee an undesirable sour profile. This defect can overshadow the coffee's inherent flavors, leaving a negative impression on the overall tasting experience. Therefore, recognizing that sour tastes arise from issues in the fermentation process highlights the importance of proper processing techniques in maintaining the quality of coffee beans.