This is the traditional accompaniment for sweet tamales, such as Sweet Pineapple Tamales and Strawberry Tamales.
2 cups milk
3 (1-inch) cinnamon sticks
4 ounces bittersweet chocolate, broken into small pieces
2 tablespoons dark brown sugar
Ground cinnamon (optional)
Find it online: https://simplygreatrecipes.com/mexican-cocoa/