The Vesper or Vesper Martini is a cocktail that was originally made of gin, vodka, and Kina Lillet. In a cocktail shaker, combine gin, vodka, and Lillet Blanc or dry vermouth. The formulations of its ingredients have changed over time. The Vesper was made famous by James Bond. The drink was invented and named by Ian Fleming in the 1953 James Bond novel Casino Royale.
Add the gin, vodka and Lillet blanc into a mixing glass with ice and stir until well-chilled.
Strain into a chilled cocktail glass.
Garnish with a lemon twist.