Chill Your Glass: Start by chilling a martini glass. You can do this by filling it with ice water while you prepare the cocktail.
Combine the Ingredients: In a cocktail shaker, add the gin, vodka, and Lillet Blanc.
Add Ice: Fill the shaker with ice cubes, about halfway full.
Shake it Up: Secure the lid on the shaker and shake vigorously for about 10-15 seconds. You want the mixture to be well chilled and slightly diluted.
Strain into Glass: Empty the ice water from your martini glass and use a cocktail strainer to pour the shaken mixture into the glass.
Garnish: Twist a lemon peel over the drink to release its oils, then drop it in as a garnish.
Serve and Enjoy: Sit back and enjoy your beautifully crafted Vesper Martini!