Grapefruit-Sage Champagne Cocktail

In a cocktail shaker, combine grapefruit juice, Sage Simple Syrup, and gin. Fill with ice. Cover and shake until very cold, about 30 seconds. Strain into a glass, and top with sparkling wine. Garnish with sage, if desired.

In a small saucepan, bring all ingredients to a boil over medium-high heat. Remove from heat, and let cool to room temperature. Strain mixture, discarding sage. Cover and refrigerate until cold. Syrup will keep refrigerated for up to 1 month.