Mix all ingredients in a very large bowl and store in air tight container. I mix mine in a Tupperware fix - n - mix bowl and just store it in that. To serve, just heat water on the stove or in a mug in the microwave. Also, the marshmallows will dry out and become hard. That's fine - afterall, the ones in the commercial brands are hard as little rocks!!! Use as much as you want to suit your own taste. When I first received this recipe back in the early 80's someone had taken the time to figure out that a serving of commercial brand cocoa mix cost about 23 cents a serving while this recipe costs about 7 cents. Also, Generics Work Fine in this recipe which will save you even more.