Instructions
- Muddle fresh mint leaves and grapefruit wedges in the bottom of a shaker.
- Add gin, simple syrup, and lime juice to the shaker.
- Fill the shaker with ice and shake vigorously for about 15 seconds.
- Strain the mixture into a highball glass filled with ice.
- Top with club soda and gently stir to combine.
- Garnish with a sprig of fresh mint and a slice of grapefruit.