Who doesn’t love an espresso? This coffee drink is distinguished for its concentrated flavour, syrupy content and layer of foam. The espresso is usually denser in taste than coffee brewed by other methods and has more caffeine than any other coffee on this list. Fun fact: the espresso is the base for many other coffee drinks—such as the caffè latte, cappuccino, macchiato, mocha, flat white, and Americano.