2 cups milk
2 tablespoons unsweetened cocoa powder
2 to 3 tablespoons sugar
1/4 teaspoon vanilla extract
Pinch of salt
2 tablespoons chocolate chips or chopped chocolate, optional
Whisk cocoa powder, sugar, and salt in a small saucepan
Add a few tablespoons of milk and whisk into a smooth paste
Pour in the remaining milk
Heat over medium-low, whisking often
Add chocolate chips or chopped chocolate, if using
Continue heating until hot and steaming, but not boiling
Remove from heat
Stir in vanilla extract
Pour into a mug and serve