How does brew temperature impact coffee extraction?

• A. It solely affects the brew time
• B. It affects solubility of oils and compounds
• C. It determines the coffee's acidity level
• D. It does not have a significant impact

Answer: (B)

Brew temperature is a critical factor in the coffee extraction process because it directly influences the solubility of various compounds present in coffee. When the water temperature is increased, it enhances the ability of soluble compounds, including oils, acids, and sugars, to dissolve and extract into the brewed coffee. Ideally, water that is too cold may result in under-extraction, where fewer desirable flavors and aromatic compounds are released, leading to a flat or weak cup of coffee. Conversely, water that is too hot can cause over-extraction, resulting in bitterness and astringency due to the extraction of undesirable compounds. Therefore, maintaining the right brewing temperature helps achieve a balanced flavor profile by ensuring optimal extraction of beneficial oils and soluble compounds while minimizing the extraction of undesirable flavors. This understanding underscores the importance of temperature in the brewing process, making it a pivotal aspect of achieving the desired taste in coffee.