Which aspect of coffee does not directly influence roasting times?

• A. Bean variety
• B. Grind size
• C. Roast level
• D. Ambient temperature

Answer: (B)

Grind size does not directly influence roasting times because it pertains to the preparation of coffee for brewing rather than the roasting process itself. During roasting, heat is applied to green coffee beans, and the transformation they undergo is primarily affected by factors such as the inherent qualities of the bean, the desired roast level, and the environment in which roasting occurs.

Bean variety plays a significant role since different types of beans can have varying moisture content and density, impacting how they absorb heat and ultimately how long they need to roast. The roast level is critical as it defines the endpoint of the roasting process, determining how long the beans are exposed to heat. Ambient temperature also affects the roasting time, as it influences how quickly heat is transferred to the beans and can alter the required duration to reach a certain roast profile.

Hence, grind size is related to the post-roasting process of preparing coffee for brewing, making it the correct choice as it does not have a bearing on the actual roasting times of the beans themselves.