First the recipe and then the information.
2 oz espresso
Brew the espresso (2 ounces per serving)
Steam and froth the milk
Pour the espresso into a 7 or 8 oz glass or cup.
Add slowly, the steamed milk, while holding back the froth.
Spoon the froth on top and serve.
Origins and History
Caffe latte (or simply latte) is a coffee drink made with espresso and steamed milk. The word comes from the Italian caffè e latte, caffelatte or caffellatte, which means “coffee & milk”.
In northern Europe and Scandinavia, the term café au lait has traditionally been used for the combination of espresso and milk. In France, café latte is mostly known from the original Italian name of the drink (caffè latte or caffelatte); a combination of espresso and steamed milk equivalent to a “latte” is in French called grand crème and in German Milchkaffee or (in Austria) Wiener Melange.
Variants include the chocolate-flavoured mocha or replacing the coffee with another drink base such as masala chai (spiced Indian tea), mate, matcha, turmeric or rooibos; other types of milk, such as soy milk or almond milk, are also used.
In Italy, caffè latte is almost always prepared at home, for breakfast only. The coffee is brewed with a stovetop moka pot and poured into a cup containing heated milk. (Unlike the ‘international’ latte drink, the milk in the Italian original is generally not foamed, and sugar is added by the drinker, if at all).
Outside Italy, a caffè latte is typically prepared in a 240 mL (8 oz) glass or cup with one standard shot of espresso (either single, 30 mL or 1 oz, or double, 60 mL or 2 oz) and filled with steamed milk, with a layer of foamed milk approximately 12 mm (1⁄2 in) thick on the top. In the US, a latte is often heavily sweetened, with 3% or even more sugar.
The drink is related to a cappuccino, the difference being that a cappuccino consists of espresso and steamed milk with a 20 millimetres (0.79 in) thick layer of milk foam. A variant found in Australia and New Zealand similar to the latte is the flat white, which is served in a smaller ceramic cup with the micro-foamed milk. In the United States this beverage is sometimes referred to as a wet cappuccino.