Three people can legitimately lay claim to creating the Cosmopolitan. Bartender Cheryl Cook came up with the original formula in 1985 when she worked at a bar called The Strand in Miami’s South Beach. She used “Absolut Citron, a splash of triple sec, a drop of Rose’s Lime Juice and just enough cranberry to make it oh so pretty in pink and topped [it] with a curled lemon twist.”
Not long after that, in New York City, Toby Cecchini, who was working behind the stick at The Odeon restaurant in TriBeCa, tweaked the recipe by replacing the Rose’s with fresh lime juice. Dale DeGroff did more or less the exact same thing at the famed Rainbow Room. Both of these joints catered to celebrities, and the drink really took off.