Mix 2 cups powdered sugar with a cup of cocoa, 2 ½ cups dry milk, a teaspoon of salt, a tablespoon of cornstarch, and a teaspoon ground cinnamon, or to taste. Mix very well and store in an airtight container. This makes about 5 ½ cups. When serving, place two heap-ish tablespoons of the mix in a mug, stir in about a half cup hot water or milk (a drop of vanilla or almond extract is di-VINE!), combine thoroughly, top off with more hot liquid and stir. Serve immediately.