1 1⁄2 oz Blanco tequila (Tapatio Blanco is perfect here)
1 1⁄2 oz Fino sherry
3⁄4 oz Guava syrup (I just use the syrup from canned guavas)
1 pn Salt
Stir over ice until frosty and serve straight up with no garnish.
The more savory, peppery depth in the tequila you pick here, the better. This cocktail really highlights the tequila, so go with a good one.