Add the espresso, brown sugar, cinnamon, and vanilla to your mug and stir until the brown sugar is fully dissolved.
1/4 cup (2 oz) espresso, 1 tablespoon light brown sugar, 1/4 teaspoon ground cinnamon, 1/4 teaspoon pure vanilla extract
If not using dairy milk, look up how to froth whatever specific type of milk you're using (see Can You Froth Almond Milk?).
If using dairy milk, warm the milk (either in the microwave or on the stovetop) until it steams and barely bubbles.
1/3 cup (80 ml) milk
For either type of milk, gently froth the milk, so there is a thin layer of foam. I used a wand frother, but an eclectic frother or French press would work too.
Pour the milk and foam over the espresso. Top with whipped cream, if desired and/or the cinnamon dolce sprinkles. Or just a bit of cinnamon. Enjoy immediately.
whipped cream