Microwave Coffee. This happens because reheating coffee releases too much of the caffeic acid and quinic acid, contributing to an overly bitter, acidic flavor. Microwaving coffee at high power (until it’s technically too hot) will give it a bitter taste, and the smell won’t be nearly as satisfying as with a freshly brewed cup of coffee.
When you microwave a cup of coffee, you’re changing the chemical makeup of the beverage. The ideal temperature for brewing coffee is above. This process allows your coffee to heat slower and brews less quickly, thus reducing the unpleasant effect the microwave produces.
