4 cups nonfat milk
13 cup dark brown sugar, packed
14 cup unsweetened cocoa powder
1 ounce semisweet chocolate or 1 ounce bittersweet chocolate, chopped
14 teaspoon cinnamon
Whisk together the milk, brown sugar, cocoa, chocolate, and cinnamon in a medium saucepan until well blended. Cook over medium heat, stirring often, until the mixture is hot and chocolate is melted, 5-6 minutes. Pour into mugs and serve at once.