The cosmopolitan is an undisputed (and delicious) modern classic cocktail, but weirdly enough, its emergence in the 1980s likely had as much to do with the martini glass it’s served in as the cocktail’s flavors — and its enduring popularity owes a debt to Sarah Jessica Parker. Read our blog post to learn more about this cocktail’s relatively short — yet still somehow convoluted — history. Order Cosmopolitan Proof Syrup to mix our incredibly simple two-ingredient version of the famous cocktail.

Pro tip: A properly chilled cocktail glass is a key element with this cocktail, so place your martini glass(es) in the freezer at least half an hour before mixing your cosmo.

Variation: Try the St-Germain cosmo, a floral, martini-inspired twist on the classic cosmo. Details are at the end of this recipe.


  • 2 oz Vodka
  • 1 oz Cosmopolitan Proof Syrup
  • Lime or Lemon Twist or Wheel to Garnish


Martini Glass


  1. Measure vodka and Proof Syrup into shaker; add ice and shake until well chilled and combined.
  2. Strain into chilled martini glass; garnish as desired and serve.

Variation: the St-Germain Cosmo

Shift the flavor profile of your Proof cosmo in a subtly floral direction with the St-Germain (aka Saint Germain) cosmo — 2 oz vodka, ¾ oz Cosmopolitan Proof Syrup, ¼ oz St-Germain elderflower liqueur.

Shake and strain as above, then garnish with a lemon twist or wheel.

Use more St-Germain if you like (though we do recommend starting with a quarter-ounce — a little adds a lot of flavor).