1 ounce unsweetened baking chocolate
1 teaspoon vanilla
2/3 cup boiling water
ground pepper or chilies to taste
courtesy of “the Field Museum“
Grate the unsweetened chocolate into a bowl and cover it with a little of the boiling water. Mash the mixture into a paste. Add the rest of the water and vanilla and beat with an electric mixer until frothy. You could also use a molinillo or blender (on high speed) to beat the mixture as well. Add the pepper or chilies to give the drink a little kick.
The chocolate does not totally dissolve in the water using this technique. Tiny particles of chocolate will float in the water, and you will be able to taste the grittiness in the drink. For a more authentic drink, allow the chocolate to cool and beat it into a froth just before you drink it.
Here’s another one from Firey Foods. Good article!