What can be inferred about the moisture content in coffee beans during roasting?

• A. It decreases throughout the process
• B. It has no effect on roasting
• C. It will increase as roasting progresses
• D. It only affects flavor development

Answer: (A)

The moisture content in coffee beans plays a significant role during the roasting process, primarily by decreasing as the beans are roasted. Initially, green coffee beans contain a considerable amount of moisture, typically ranging from 8% to 12%. As roasting commences, the heat causes this moisture to evaporate.

This decrease in moisture is crucial because it affects the physical and chemical changes that beans undergo during roasting. As moisture is driven out, the beans undergo significant transformations, such as caramelization of sugars and the development of complex flavors. If moisture were to increase during roasting, it would lead to uneven roasting and negatively impact the beans' flavor and texture.

Recognizing this trend of moisture loss helps roasters control the roasting profile for optimal flavor development. The proper management of moisture levels is essential for achieving a desirable balance of acidity, sweetness, and body in the final cup.