The main difference between the flat white vs cappuccino is the milk-to-espresso ratio and foam type. Microfoam is the flat white’s chief characteristic. But the cappuccino’s foam is thicker and rests atop the steamed milk. Cappuccino’s foam is also referred to as “macrofoam”—the opposite of the flat white’s tiny-bubbling froth.
An average 8-oz cup of brewed coffee contains between 80-100mg of caffeine, according to the FDA. Yet, how much caffeine is in a cup of coffee depends on several factors, including: the type of bean, the brewing method, and the serving size. In fact, some specialty coffees can contain as much as 500mg per cup!