Caffeine is a crucial part of many people's daily routines, yet using leftover coffee for iced drinks can lead to a disappointing bitter flavor. Over time, the compounds responsible for coffee's rich taste break down, resulting in harsh acids and loss of aroma, especially when cooled. Reheating coffee doesn't restore flavor and can actually worsen bitterness. Instead, try enhancing stale coffee with syrups or spices to improve its taste, and consider brewing fresh coffee for the best iced experience.
Brewing an entire pot of coffee in the morning ensures that you'll have enough for a cup every few hours, but using leftovers could be one of the mistakes.
The chemical compounds that give coffee that smooth, rich taste when first brewed break down as it sits, causing it to develop different acids.
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