1 oz Vodka
1 oz Elderflower Liqueur
1/4 oz Grapefruit Juice
1/4 oz Lemon Juice
1/4 oz Lime Juice
1 oz Brut Champagne.
Boxcutters, Jigger, Shaker Classic/Boston, Citrus Juicer, Strainer, Coupe Glass.
Combine all Ingredients except Champagne in an ice-filled shaker. Shake vigorously and strain into a chilled Coupe Glass. Top with Champagne and serve.