The Vesper Martini is something of a hybrid between the Vodka Martini and the Gin Martini, incorporating both vodka and gin. A splash of fruity, aromatic Lillet blanc—a French apéritif—takes the traditional place of vermouth. The Vesper Martini is shaken in a cocktail shaker over ice (traditional Martinis are stirred to avoid diluting the cocktail with ice chips) and garnished with lemon peel to echo the citrusy Lillet.
You have James Bond to thank for this one; the drink was created by author Ian Fleming, who included the recipe in his book Casino Royale, calling specifically for Gordon’s gin and Kina Lillet.