The Real Cadillac Margarita - cooking recipe

Ingredients

2 ounces premium 100% agave silver tequila (such as 1921, Don Julio, 1800)
1 ounce triple-sec orange-flavored liqueur
1 ounce freshly squeezed lime juice (about one lime)
1/2 1/2 ounce Grand Marnier or 1/2 ounce gran gala
kosher salt
ice

Preparation

Pour a thin line of kosher salt on a plate. Rub lime slice around outside rim of martini glass to wet rim with lime juice. Turn martini glass sideways and roll the rim in the line of kosher salt.
Fill cocktail shaker with ice. Add fresh lime juice, tequila, and triple sec. Shake very well.
Pour shaken mixture into the salt-rimmed martini glass, leaving all ice in the shaker.
Slowly pour the 1/2 ounce of Cointreau, Grand Marnier, or Gran Gala on top.
Garnish with lime slice on rim and lime peel twist/curl in drink.
Enjoy the purists' margarita. :).