Cicerone Certified Beer Server Practice Test

What characteristic flavor does oxidation in beer impart?

1. Fresh and citrusy

2. Sweet and caramel

3. Stale or cardboard-like

4. Spicy and herbal

The correct answer is: Stale or cardboard-like

Oxidation in beer primarily leads to the development of stale or cardboard-like flavors. This occurs when oxygen interacts with the various compounds present in the beer, causing chemical reactions that can alter the flavor profile. Over time, this process often results in a decrease in freshness and can produce off-flavors that are reminiscent of paper, cardboard, or wet wood. These characteristics are often considered undesirable and point to a deterioration of the beer's quality. This stale or cardboard-like flavor is particularly common in certain styles of beer that are not well-protected from oxygen, such as those that are improperly stored or that have been exposed to air for too long. An understanding of this transformation is essential, as it helps in recognizing the importance of proper storage and handling of beer to maintain its intended flavor profile.