Like a caffè latte, it is based on espresso and hot milk, but with added chocolate, typically in the form of sweet cocoa powder, although many varieties use chocolate syrup. Mochas can contain dark or milk chocolate.
Café mocha, in its most basic formulation, can also be referred to as hot chocolate with (e.g. a shot of) espresso added. Like cappuccino, café mochas typically contain the well-known milk froth on top, although, as is common with hot chocolate, they are sometimes served with whipped cream instead. They are usually topped with a dusting of either cinnamon or cocoa powder and marshmallows may also be added on top for flavor and decoration.