Perhaps the most popular origin story was first printed in the December 1953 issue of Esquire and credits Dallas socialite Margarita Sames with the invention during a Christmas party at her home in Acapulco. The story goes that, after several unsuccessful attempts to please her thirsty guests, she combined her two favorite ingredients, tequila and Cointreau, with lime, and her guests enjoyed it so much that they named it after her. But that version claims it was made in 1948 and, by that time, there are already references to a drink called the “margarita” in a few advertisements and on a select few menus South of the Border.
Either way, the margarita didn’t actually gain notable popularity until the '70s, with the invention of the world's first frozen margarita machine in 1971 by Mariano Martinez, a Dallas restaurateur and patron saint of Spring Breakerz. It was created in response to an overwhelming demand and inconsistency with his blended margaritas. Inspired, as one generally is at the sight of a Slurpee machine at a 7-11, Mariano modified a soft-serve ice cream machine, boosting the sugar level of the mixture to counter the freezing difficulty of alcohol.
Another variation that has popularized itself is the Tommy’s Margarita, named after the San Francisco Mexican restaurant where the cocktail originated. This version replaces orange liqueur with agave nectar for a sweeter twist from the same plant the tequila is made from.