Matthew says that this formula makes one serving, but I find that it’s also a nice amount for one adult and one young child. Be sure to use a high-fat, natural (not Dutch-processed) cocoa powder, like Penzey’s or Scharffen-Berger.
Whisk together the cocoa powder and sugar in a mug, if serving one, or, if serving two, just do this in the measuring cup that you measured the milk in. Add a splash of the hot milk, and continue whisking until a thick paste forms. Continue adding milk and whisking until the cocoa is rich and well-blended. Serve immediately.
Yield: 1 good adult serving, or enough for 1 adult and 1 kid who don't mind sharing