What impact does over-roasting have on coffee beans?

• A. It creates a more balanced flavor
• B. It generates a strong caffeine boost
• C. It leads to bitterness and burnt flavors
• D. It enhances the aromatic profile

Answer: (C)

Over-roasting coffee beans significantly affects their flavor profile, and one of the most notable consequences is the development of bitterness and burnt flavors. When coffee beans are subjected to excessive heat, the Maillard reaction continues beyond its ideal point, leading to a breakdown of the sugars and compounds that contribute to the desirable flavors in coffee. This process not only eliminates the nuanced flavors that the beans may originally possess but also introduces harsh, acrid notes that can overwhelm the palate. The result is a cup of coffee that lacks complexity and is dominated by a charred taste, which is often perceived as unpleasant.

In addition to altering flavor, over-roasting can also impact the aromatic qualities of the coffee. While roasting is intended to enhance these aromas, over-roasting can mask them, leaving the coffee with only the undesirable smell of burnt beans. Thus, understanding the implications of roasting levels is crucial for achieving a balanced and enjoyable coffee experience.