I've been making this for the past few months and just can't get enough!
2 cups nonfat dry milk powder
3/4 cup sugar (I bumped it up to 1 c.)
1/2 cup unsweetened cocoa
1/2 cup mini semisweet chocolate chips (I have used "regular" size, as well as milk chocolate chips)
1/2 cup powdered nondairy creamer
1/8 teaspoon salt
Measure all of the ingredients into a mixing bowl and pulse in a food processor (or blender, I suppose) until they are evenly blended. Store the mix in a tightly covered container at room temperature until you're ready to package it. Makes about 4 cups of mix. To serve, mix 3-4 Tbl. of mix with hot water.