How does brew time affect coffee extraction?

Brew time has a significant impact on the extraction process when making coffee. During extraction, water interacts with coffee grounds, dissolving various compounds that contribute to flavor. If the brew time is extended beyond the optimal range, it can lead to over-extraction. This occurs when too many undesirable compounds are extracted, resulting in a bitter taste and a lack of balance in the cup.

Over-extraction typically happens because prolonged contact between water and coffee grounds draws out excessive amounts of tannins and other bitter compounds that can overshadow the desirable flavors. Optimal brew times vary depending on the brewing method and the grind size, with each method requiring precise timing to achieve a balanced extraction.

Thus, the understanding of brew time is crucial for achieving the desired taste profile in coffee, as longer brew times can sometimes lead to adverse flavor outcomes, making it essential for baristas to comprehend and control this variable effectively.