1 ½ oz. Dry Gin
½ oz. Campari (Italian Red Bitter)
⅓ oz. St. Germain Elderflower Liqueur
¾ oz. Pink Grapefruit Juice (freshly squeezed)
1 Grapefruit zest twist (Garnish)
shake all ingredients with ice and fine strain into a chilled Champagne Coupe