Which type of espresso drink typically has a layer of milk foam on top?

A cappuccino is characterized by its rich layer of milk foam on top, which is a defining feature of this popular espresso drink. This drink is traditionally made with equal parts of espresso, steamed milk, and milk foam, resulting in a velvety texture and balanced flavors. The milk foam not only adds creaminess but also helps insulate the drink, keeping it warm longer.

In contrast, lemonade is a non-coffee beverage that doesn't involve espresso or milk. A caramel frappuccino is a blended beverage that includes ice and syrup, which does not create the creamy milk foam layer associated with espresso drinks. Lastly, a vanilla bean scone is a baked good and has no relation to espresso beverages at all. Thus, the cappuccino stands out as the correct choice due to its unique preparation and presentation that includes a layer of milk foam on top.