It is not cold here yet, but I'm getting some the ingredients for this tonight at the grocery store! I'm going to make it in a much larger batch though!
3 cups dry milk powder
1 cup Splenda (granular)
1/2 baking cocoa
1 (1 ounce) package of sugar-free instant vanilla pudding mix
use 1/4 cup mix, and add one cup of hot water. Makes 18 servings. (Store in an air-tight container.)
I'm buying mini-marshmallows for mine. :)