Warm the milk: Gently heat the milk until it’s steamy but not boiling.
Aim for about 140–150°F (60–65°C). If you have a steam wand, give it a quick swirl to add a bit of texture, but keep it light—no big foam.
Make the brown sugar cinnamon syrup: In a small cup, stir brown sugar with a splash of hot water until fully dissolved. Add the cinnamon and, if using, a tiny pinch of salt and a drop of vanilla.
You want a smooth, pourable syrup.
Pull the espresso: Brew 2 shots of espresso into a small heatproof glass. If you don’t have an espresso machine, use a strong Moka pot coffee or a concentrated AeroPress brew.
Sweeten the espresso: Stir in 1 to 2 teaspoons of the brown sugar cinnamon syrup. Taste and adjust.
The cortado should be gently sweet, not sugary.
Add the milk: Pour the warm milk over the espresso in a roughly 1:1 ratio. You’re aiming for a smooth, velvety blend without a thick cap of foam.
Finish and serve: Dust with a tiny pinch of cinnamon if you like. Serve immediately while warm and aromatic.
For an iced version: Build it over ice—espresso first with syrup, stir well, then add cold milk.
Skip warming the milk and use a little extra syrup since cold drinks can mute sweetness.