In case you’re curious, the name of this drink translates from the Spanish to mean “Old Fashioned”, so if you were guessing that this was a Tequila Old Fashioned, then you’re probably right. In fact, the Estilo Viejo, with Tequila, Agave & Angostura Bitters, it actually is.
Stir half the Tequila with ice cubes. Add Agave Syrup and Angostura Bitters. Stir some more and add another two ice cubes and the rest of the Tequila. Stir more and add more ice, until you feel the dilution is correct.