Besides a shot of espresso, the most important factor in preparing a cappuccino is the texture and temperature of the milk. When a barista steams the milk for a cappuccino, microfoam is created by introducing very tiny bubbles of air into the milk, giving the milk a velvety texture. The traditional cappuccino consists of an espresso, on which the barista pours the hot foamed milk, resulting in a 2 cm (¾ inch) thick milk foam on top. Variations of the mixtures are usually called cappuccino chiaro (white cappuccino, also known as a wet cappuccino) with more milk than normal, and cappuccino scuro (dark cappuccino, also known as a dry cappuccino) with less steamed milk than normal.

