What Is Cafe Latte? | Ratios, Origin & How to Make One

A cafe latte is an espresso-based coffee drink built from one or two shots of espresso, steamed milk, and a thin layer of frothed milk foam, typically served in a 170–240ml glass.

The cafe latte comes from Italian coffee culture — the full name caffè e latte literally means “coffee and milk.” In Italy, ordering just a “latte” gets you a glass of milk, because latte itself means milk. The drink found its modern American identity in the early 1980s in Seattle, where imported espresso machines met tastes that found cappuccinos too strong. Adding extra milk to mellow the intensity created the latte as we know it today.

The Standard Composition: Ratios and Parts

A proper latte uses espresso and steamed milk in a clear ratio. The standard mix calls for 1 part espresso to 3 parts milk, with a thin foam layer on top. An alternative ratio of 1:2 produces a stronger coffee flavor.

• Espresso: One or two shots, about 30ml each
• Steamed milk: Roughly 90ml, heated until silky
• Foam: A thin 1cm layer on top, not thick and stiff
• Total volume: 170–240ml, served in a pre-warmed glass

The crucial rule: a latte must use espresso, never brewed coffee. If you make this drink with drip or French press coffee, you have a café au lait, not a latte. Espresso machines with steam wands are the standard equipment for pulling proper shots and texturizing milk to the right velvety consistency.

How a Cafe Latte Differs From Similar Drinks

The difference between a latte and other milk-coffee drinks comes down to the milk texture and coffee base. A cappuccino uses equal parts espresso, steamed milk, and foam — meaning a much thicker, stiffer foam cap. A flat white has a thinner microfoam layer and less total milk, making the espresso taste more dominant. A macchiato is an espresso “stained” with a small dollop of foam, hardly any milk at all. And café au lait, common in France, uses brewed coffee instead of espresso.

Whole milk creates the best froth texture because of its fat and protein content. Lower-fat or plant milks can work, but they produce thinner, less stable foam. Some baristas add a thermometer to track the milk temperature — roughly 150–155°F — because overheated milk loses sweetness and scorches the proteins.

Common Mistakes When Making a Latte

Even simple lattes go wrong in predictable ways. Substituting brewed coffee for espresso creates a different drink entirely. Too much foam or stiff, dry foam turns the drink into a cappuccino. Cold milk poured over espresso won’t mix properly, and serving in an unheated glass cools the drink before it reaches the table. The ratio matters — stray too far from the 1:3 espresso-to-milk baseline, and you lose the balance that defines a latte.

If you are shopping for a machine to make these at home, the best cafe latte machines rated for home use cover models with reliable steam wands and consistent pressure for pulling espresso shots.

Making a Standard Cafe Latte at Home

Preheat a 200ml glass by rinsing it with hot water. Purge the steam wand to clear any condensation, then brew 1–2 shots of espresso (about 60ml total) into the warm glass. Steam whole milk in a metal pitcher — submerge the steam wand tip just below the surface to create a whirlpool that stretches and heats the milk into a silky, glossy texture, not foamy bubbles. Pour the steamed milk into the espresso, holding back the foam with a spoon until the glass is nearly full, then spoon a thin 1cm layer of foam on top.

The result is a balanced, mild coffee drink. Add sugar or flavored syrup if you like, though the classic version relies on the sweetness of properly steamed milk. , in case you want an excuse to practice.