Café au lait is brewed coffee — not espresso — mixed with an equal quantity of hot milk. Traditionally served at home in a wide bowl, for dipping bread or a croissant.
Why the distinction matters
A café crème and a latte are built on espresso. A café au lait is built on filter or press coffee, which makes it a genuinely different drink: lighter, less concentrated, larger.
Café bars in France serve a crème; the au lait is a home breakfast.
The proportions
One to one. Strong coffee — a French press or a well-made filter — and milk heated to just below boiling and poured in simultaneously from two jugs, which is the traditional method.
The milk is scalded rather than textured. There is no foam.
New Orleans
The city’s version adds chicory to the coffee, a habit that began during Civil War shortages and became permanent. It is bitter, woody and distinctive, and it is what Café du Monde serves.
Spain’s café con leche is close, usually with espresso or moka coffee. Italy’s caffè latte is the espresso version. Portugal’s galão is milkier still, served in a glass.
Making one
Brew coffee at 60 g per litre, heat milk to just below boiling, pour both together into a bowl.