Directions

1. First, prepare the rosemary simple syrup. In a small saucepan, combine the water, sugar, and rosemary sprig to a boil, stirring to ensure the sugar is fully dissolved. After the liquid has boiled and sugar has dissolved, reduce heat to low and simmer for 5 minutes. This will make enough for 8 cocktails. Store leftovers in an airtight container in the fridge.
2. In a glass, pour the vodka, grapefruit juice, club soda, 1 Tablespoon of the simple syrup, and several ice cubes. Garnish with a sprig of rosemary and a slice of grapefruit if desired and serve chilled.