Mocha is made by mixing coffee with which other flavor?

A mocha coffee, also called mochaccino, is a chocolate-flavored warm beverage that is a variant of a latte coffee, commonly served in a glass rather than a mug. The name is derived from the city of Mocha, Yemen, which was one of the centers of the early coffee trade. Like a latte, the name is commonly shortened to just mocha.

Source: Wikipedia