I make this at least once a week. It will make one generous serving. I usually double it and make 3 servings out of it.

1 Tbs. Cornstarch

2 Tbs Cocoa Powder

2 Tbs. Sugar

3/4 cup skim milk

1/2 tsp. vanilla

Mix dry ingredients till blended. Add mild slowly till smooth. Place in small bowl and Micro for 2-3 minutes, depending on the wattage of your micro. watch it and as soon as it starts to boil, remove from Micro and place in small dish.
I have used other flavorings and even a little Frangelica etc.