Chocolate Cocktail - Rick Bayless

Ingredients

• Sugar or cinnamon sugar (2 parts sugar mixed with 1 part ground cinnamon, preferably Mexican canela)
• 1 1/2 ounces 100% blue agave blanco tequila
• 1/2 ounce crème de cacao liqueur
• 1/2 ounce agave syrup (light organic syrup gives the best flavor)
• 1/2 ounce best-quality chocolate sauce, store bought or homemade (recipe below), at room temperature
• 6 to 10 small ice cubes (about ¾ cup)