Brew the coffee: Brew roughly ½ cup strong coffee. If using drip, use a more concentrated ratio (e.g. 1:14 instead of 1:18) or use French press with coarser grind.
Prepare the milk: Steam the milk until it’s hot (around 150-160°F / 65-70°C), creating light froth on top. If you don’t have a steamer, heat gently in a saucepan and whisk vigorously to get some foam.
Flavor the base: In your mug, add vanilla syrup + hazelnut syrup. Pour in the brewed coffee and stir to combine so the syrups dissolve.
Add the milk: Slowly pour the steamed milk over the coffee mixture, holding back foam with a spoon. Then spoon the foam on top for texture.
Garnish & serve: Sprinkle a few chopped toasted hazelnuts over the foam. Optionally, dust lightly with cinnamon or cocoa powder.