Greg's Impressive Hot Cocoa(Sounds much better than 'Greg's edible emulsion'.)You may adjust the quantities, but perhaps try it like this once before modifying...
Ingredients:2x heaped teaspoon of brown sugar
1x heaped teaspoon of cocoa powder
1x round teaspoon of corn flour
pinch salt
pinch cayenne pepper (1/8 teaspoon)
pinch chili powder (1/8 teaspoon)
Instructions:Mix all dry ingredients in mug.
Add hot water slowly while stirring rapidly.
It is important to mix all dry ingredients together well or you will get lumps.
Drink while hot.
Go on, make a pot right now, you know you want to

And yes, there is no milk in this recipe. I tried a lot of ingredients and a lot of methods before arriving at this brew.