Step 1.
- Chill a cocktail glass by filling it with ice water and set aside.
Step 2.
- In a cocktail shaker, combine 3 ounces of gin, 1 ounce of vodka, and 1/2 ounce of dry vermouth.
Step 3.
- Fill the shaker with ice and shake vigorously until well chilled.
Step 4.
- Empty the cocktail glass of ice and strain the mixture into the glass.
Step 5.
- Garnish with a thin slice of lemon peel.