If you choose to have a Tajín rim, spread the Tajín on a small plate, moisten the rim of a 6-ounce martini glass (a lime wedge works well) and upend the glass onto the salt to crust the rim.
Scoop the jalapeño into a shaker and muddle it—crushing it to release its juices. Add the rest of the ingredients along with about 8 ice cubes, cover and shake vigorously for about 10 seconds. Strain into a waiting glass.
I’ve been looking for a good mezcal margarita recipe and this one fits the bill more than just substituting mezcal for tequila. I actually up the mezcal to 2 full ounces because I dig the smoky profile a bit more. Thank you for this!