For one serving:
- 2 oz vodka or gin
- 1 oz fresh lemon juice
- 1 oz fresh grapefruit juice
- 1/2 oz simple syrup
- 2-3 sprigs fresh rosemary
- Club soda
- Ice
- Lemon or grapefruit slice for garnish
Fresh citrus juices are key for the best taste. You can adjust the amount of simple syrup to your liking.