Melt chocolate:
chopped up in a double boiler with hot not boiling water,
chopped up in the microwave on low or defrost.
Bring indredients (minus tequila) to a boil in a saucepan.
With a whisk, froth the ingredients until the potient stops boiling.
Stir in tequila.
Serve in mugs garnished with cinnamon sticks.