The slushy history of the Slurpee: Can Dallas claim the icy treat?


Dallas has at least one icy concoction on its résumé.

When Mariano Martinez wanted to improve the consistency of the margaritas at his East Dallas Tex-Mex restaurant in the early 1970s, he converted a soft-serve ice cream dispenser into the world’s first frozen margarita machine.

But can Dallas also claim the frozen concoction that supposedly inspired Martinez’s innovation?