Understanding the Ratio
The most helpful way to distinguish these drinks is by looking at how much milk is added to the espresso.
A Cortado follows a consistent 1:1 ratio. This means if the barista pulls a 2oz double shot of espresso, they add exactly 2oz of steamed milk. The name comes from the Spanish word cortar (kor-TAR, meaning "to cut"). The milk is there to soften the intensity of the espresso without hiding its character. Because there is so little milk, it is typically steamed with very little foam.
A Flat White generally uses a 1:2 or 1:3 ratio. It contains the same amount of espresso as a cortado but is combined with more milk—usually 4oz to 5oz. The milk is steamed into microfoam (very fine milk foam with tiny bubbles), which is poured so it blends into the espresso. This creates a drink that feels creamier than a cortado while still remaining stronger than a latte.
Texture and Presentation
Texture is where the two drinks diverge. Because a flat white relies on microfoam, it often features latte art on the surface. The milk and coffee are blended into a single, smooth liquid.
A cortado is traditionally served in a small Gibraltar glass (jih-BRAWL-ter), a thick glass commonly used for cortados. The milk is steamed to be hot and liquid, with only a thin, natural layer of bubbles on top rather than a thick foam.
Good to Know: Temperature and Glassware
Because these drinks are small, they are often served at a slightly lower temperature than a large latte. This allows the drinker to enjoy the espresso flavor immediately without waiting for it to cool.
Additionally, the use of a glass for a cortado versus a ceramic cup for a flat white allows heat to dissipate slightly faster.
Which to Order
If you are looking for a small, concentrated drink that highlights the flavor of the coffee bean, the Cortado is a common choice.
If you want the strength of espresso but prefer a smoother milk texture, the Flat White offers a creamier and more integrated drink.