1 1/2 cups milk
1/3 cup Nutella
1 cinnamon stick
4 ounces bourbon, Frangelico, cacao rum, or chocolate liqueur, optional
Whipped cream or marshmallows, to top
In a pot over medium-high heat, bring the milk to a simmer. Add the Nutella, stirring until it has melted and become incorporated. Add the cinnamon stick and bring to a simmer.
Divide the bourbon between two mugs, if using (2 ounces per mug). Ladle the hot milk mixture into the mugs and serve with fresh whipped cream or marshmallows. If serving with marshmallows, toast on a foil-lined baking sheet under the broiler for 30 to 45 seconds, until golden.