Ingredients
Method
Place rosemary sprigs in a 1-qt. resealable glass jar and pour in vodka (reserving bottle). Let sit at room temperature for 24 hours. Taste, and if desired rosemary flavor is present, remove the rosemary sprigs and pour back into vodka bottle, or infuse for an additional 24 hours if more flavor is desired.
In a cocktail shaker, combine rosemary-infused vodka, simple syrup, grapefruit juice, and lemon juice. Add ice and shake. Strain into an ice-filled rocks glass and garnish with rosemary sprig.