2 oz tequila (100% agave)
1 oz fresh lime juice
3/4 oz triple sec (or Cointreau)
1/2 oz simple syrup (optional, to taste)
Salt (for rimming glass)
Lime wedge (for rimming and garnish)
Ice
Rim a chilled glass with salt (rub with lime wedge, dip rim in salt).
Fill a shaker with ice.
Add tequila, lime juice, triple sec, and optional simple syrup.
Shake vigorously for 15–20 seconds.
Strain into the prepared glass over fresh ice.
Garnish with a lime wedge.