Step 1

Make the lemon twist garnish, if using.

Step 2

Place the gin, lemon juice, and syrup in a cocktail shaker with ice. Shake 15 seconds until cold. Strain the liquid into a champagne flute. (You can also pour these ingredients right into the flute, but the classic method is to use a cocktail shaker. If desired, shake up to 4 drinks at one time.)

Step 3

Top off the glass with champagne. Garnish and serve.

Step 4

In a pitcher, stir together 1 1/2 cups gin, 3/4 cup lemon juice, and 1/2 cup simple syrup and refrigerate until serving (or stir with 1 handful of ice, then discard the ice). When serving, add 3 ounces (6 tablespoons) gin mixture to each glass with 3 ounces champagne.