Ingredients

10 ounces best-quality bittersweet or semisweet chocolate, chopped 

2 quarts milk 

1 teaspoon pure vanilla extract 

Preparation

Combine chocolate and milk in a large saucepan over medium heat. Whisk until chocolate is melted and milk is very hot and frothy, about 20 minutes.

Remove from heat. Add vanilla; pour into a blender, filling halfway. Blend, holding lid in place (the hot liquid will expand), until frothy. serve immediately; blend remaining milk-and-chocolate mixture.