Step 1

Place the St. Germain, gin, lemon juice, and syrup in a cocktail shaker with ice. Shake 15 seconds until cold. Strain the liquid into a champagne flute.

Step 2

Top off the glass with champagne (no need to measure). Garnish and serve. (Note: You can also make a large batch of the St. Germain, gin, lemon juice, and syrup ahead if desired, then measure out 6 tablespoons per glass.)