When you add sugar to your cup, the sugar sweetens your coffee and enhances its natural flavor. Sugar also causes a molecular change in brewed coffee. When caffeine, water and sugar interact, they work together to block the bitter taste that can be unpleasant to some coffee drinkers.

Caffè americano. An americano is prepared by adding hot water to espresso, giving a similar strength to but different flavor from brewed coffee.

Coffee bioactive components include caffeine, chlorogenic acids (CGAs), trigonelline, tryptophan alkaloids, diterpenes and other secondary metabolites.

A red eye is a typical cup of drip coffee with a shot of espresso added in. Order a “black eye” if you want two shots added in and refuse the comforts of sleep. Café Americano - This now-classic beverage is one of the more confusing ways to order espresso for beginners.