A cappuccino, is an Italian coffee drink traditionally prepared with espresso, hot milk, and steamed-milk foam. Istituto Nazionale Espresso Italiano defines cappuccino as a beverage prepared with 25 ml espresso, and 100 ml steam-foamed milk. In coffee shops in North America, cappuccino is prepared with a doppio espresso and frothed milk up to 6 fl oz.
The milk content is about two thirds of the total beverage volume. However, half of the milk is simply steamed milk, while the other half is foamed milk, which serves mostly as decoration. So in effect, the total content of milk is about the same as the content of coffee. Cappuccino is often confused with latte, which has a greater milk quantity.