Brew a strong cup of espresso or coffee to your liking and set it aside.
In a small saucepan, combine the steamed milk, mascarpone cheese, sugar, and vanilla extract over medium heat. Stir gently until the mascarpone fully melts and incorporates into the milk, creating a creamy mixture. Do not let it boil.
Once the mixture is well combined, remove it from the heat and set it aside.
In your serving mug, pour the hot espresso or coffee.
Gently pour the creamy milk mixture over the coffee, allowing the two to blend beautifully.
Sift the cocoa powder over the top for that classic tiramisu finish.
Add chocolate shavings on top for extra richness and a sprinkle of ground cinnamon, if desired.
Serve immediately and enjoy the warm flavors reminiscent of traditional tiramisu in a cozy latte form!