Fill a shaker with ice cubes. Add all ingredients. Shake and strain into a chilled cocktail glass. Garnish with orange.
A pink drink served in a Martini glass and called The Cosmopolitan is said to have originated in San Francisco in the 1980s, but it wasn't until 1988--the year Absolut Citron was launched--that the Cosmopolitan as it is known today was created. Bartender Toby Cecchini adapted the original recipe, using fresh juice, orange liqueur, a splash of cranberry, and the first citrus-flavored vodka. The rest is history!