Pull 2 shots of espresso.Grind coffee beans and use an espresso machine to extract 2 shots of espresso into a small cup that holds at least 4 ounces. A gibraltar glass is the perfect size for a cortado at 4.5 ounces.
Steam milk.Froth 4 ounces of lightly textured milk (the same as you would for a latte)—but you’ll only use 2 since steaming less than 4 ounces is difficult without burning it.
Pour milk into espresso.Into your cup with espresso, pour in 2 ounces of milk.