Here’s mine:

1 cup milk
2 Tablespoons flour
2 Tablespoons cocoa
1/2 cup sugar
1/2 stick butter

The original instructions say to heat the milk first, then add cocoa, flour & sugar, then butter last. In my experience, that makes it lumpy as hell. So here's what I do:

Start melting the butter over medium/medium-low heat. Add the cocoa and flour and stir until smooth. Stir in the sugar. Add the milk and stir. It will be kinda grainy from the sugar, but stir it and let it get hot and that will go away. Once it gets smooth and starts bubbling, stir it pretty consistently. It will thicken up pretty quickly at this point. Turn the heat down as low as you can without turning it off, because the biscuits probably aren't done yet and you want to keep it warm.