This one is absurdly simple

15 grams chocolate chips.(about a teaspoon) 150 grams water. (A little over a cup.)

Boil until it looks like hot chocolate. Be sure to stir well or some will end up partially melted on the bottom.

Calories 75
carb fat prot
53% 33% 7%

I tried it tonight and it tastes real good. And it's a lot lighter than the stuff that comes in a package. This recipe is my own creation, but I'm sure I'm not the first to think of it. No credit needed.