Quick Answer: A cortado and a cappuccino both start with espresso and steamed milk, but the ratio and foam are opposites. A cortado is a 1:1 espresso-to-steamed-milk pour with almost no foam, served in a 4 to 4.5 oz Gibraltar glass. A cappuccino is a traditional 1:1:1 split — espresso, steamed milk, and a dense 15 to 20 mm foam cap — in a larger 150 to 180 ml cup, per Specialty Coffee Association guidelines. The twist: most specialty cafes pour a cortado as a double shot by default (~126 mg caffeine) while a traditional cappuccino stays a single shot (~63 mg), per USDA FoodData Central — so the smaller drink usually has more caffeine, not less.

Cortado and cappuccino both get filed under “small milky espresso drink,” but they solve different problems: one mutes the shot’s acidity with a splash of milk, the other builds a foam-forward drink around it. If you’re weighing cappuccino against its bigger milk-drink relatives, see cappuccino vs latte for the ratio math, or espresso vs cappuccino if you’re deciding whether to add milk at all.

Cortado vs cappuccino at a glance

TraitCortadoCappuccino
Ratio1:1 espresso to steamed milk1:1:1 espresso, milk, foam
Total volume4–4.5 oz (Gibraltar glass)150–180 ml (5–6 oz), per SCA spec
Foam depth~0 mm, knocked flat15–20 mm dense cap
Typical café caffeine~126 mg (double shot default)~63 mg (traditional single shot)
Serving vesselSmall glass ("Gibraltar")Wider ceramic cup
OriginSpain ("cortado" = cut)Italy, modern spec via SCA

Cortado vs cappuccino, by the numbers

Ratio: 1:1 versus 1:1:1

The core difference is simple math. A cortado is built on a 1:1 pour — typically a double shot of espresso met with an equal volume of steamed milk, landing the whole drink around 4 to 4.5 oz in a Gibraltar glass. A cappuccino adds a third component: roughly equal parts espresso, steamed milk, and milk foam, per the Specialty Coffee Association’s traditional 150 to 180 ml serving. Both start from the same shot; the cortado stops at “espresso plus milk,” while the cappuccino adds the foam layer as its defining third ingredient.

Winner: cortado, for the smallest possible milk addition; cappuccino, if foam is part of what you’re ordering.

Foam: knocked flat versus whipped dense

A cortado’s milk is steamed to a smooth, silky texture with the surface froth largely knocked out before pouring — the goal is to “cut” the espresso’s acidity, not to add texture. A cappuccino goes the opposite direction: the milk is steamed and whipped into a dense, dry microfoam cap that holds its shape, landing at 15 to 20 mm thick in a well-made drink, well above the SCA’s 1 cm minimum spec. If a “cappuccino” on a menu has little to no visible foam cap, it’s closer to a cortado in practice, regardless of the name.

Winner: cappuccino, for anyone who wants the foam texture; cortado, for anyone who wants milk without a foam layer.

Caffeine: the double-shot trick

This is where the two drinks flip expectations. Per USDA FoodData Central, a single espresso shot carries about 63 mg of caffeine regardless of what it’s served in. A traditional single-shot cappuccino sticks to that number. But most specialty coffee shops pour a cortado as a double shot by default, since the drink is small enough that a single shot would feel underwhelming against 4 to 4.5 oz of milk — pushing a typical café cortado to roughly 126 mg of caffeine, double the traditional cappuccino. The smaller cup doesn’t mean less coffee; it usually means more, concentrated into less milk.

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A cortado’s smaller milk pour also means less room to hide a stale bean’s flat, cardboard-y taste — Amazon Fresh can get a new bag of whole-bean coffee to your door same-day if your current stash has been sitting open too long.

Winner: cortado, for caffeine per ounce, thanks to café double-shot convention rather than any inherent difference in the drinks.

Size and glass: the Gibraltar story

A cortado is traditionally served in a small glass — 4 to 4.5 oz, with the 4.5 oz “Gibraltar” glass becoming the unofficial US standard after Blue Bottle Coffee’s founder repurposed cupping glasses from Libbey Glass Company for the drink in the early 2000s. A cappuccino runs noticeably bigger at 150 to 180 ml (5 to 6 oz) per SCA spec, and many US cafes stretch that further toward 8 to 12 oz. If a drink arrives in a small clear glass with visible espresso-and-milk layers and little foam, it’s a cortado (or “Gibraltar”); if it arrives in a wider cup topped with a thick foam dome, it’s a cappuccino.

Winner: cortado, for the most compact, concentrated pour.

Which one should you order or make?

The bottom line

A cortado and a cappuccino aren’t points on the same strength scale — they’re built on different ratios entirely. A cortado’s 1:1 espresso-to-milk pour in a 4 to 4.5 oz Gibraltar glass skips foam almost entirely; a cappuccino’s 1:1:1 split adds a dense 15 to 20 mm foam cap in a larger 150 to 180 ml cup, per Specialty Coffee Association guidelines. The real surprise is caffeine: because specialty cafes typically pour a cortado as a double shot by default, the smaller drink often lands around 126 mg versus a traditional cappuccino’s 63 mg, per USDA FoodData Central — proof that cup size says nothing about shot count. For the machine that pulls a clean shot either way, start with our best espresso machine guide, or see cappuccino vs latte for how the ratio shifts again once milk takes over. If it’s the flat white you’re actually comparing a cortado to, cortado vs flat white covers that closer matchup — including why Starbucks’ own “Cortado” isn’t a traditional one at all.