1 tsp Villa de Patos maguey sweet sap (or agave nectar
2 dashes Angostura bitters
Muddle an orange peel with the vanilla liqueur, maguey sap, and bitters in a rocks glass. Add an ounce of the tequila and some ice, and stir. Add the remaining tequila and more ice and stir until the glass is well-frosted.