Grapefruit-Rosemary Daiquiris

Directions

1. 1
   Pour 2 1/2 cups grapefruit juice into 2 ice cube trays; freeze until firm. Cover and chill remaining juice.
2. 2
   Stir together water, sugar, and 2 rosemary sprigs in a saucepan; bring to a boil. Cover, reduce heat, and simmer 10 minutes. Remove from heat; discard rosemary sprigs. Cool syrup; chill.
3. 3
   Process frozen juice cubes, remaining 1/2 cup grapefruit juice, rosemary syrup, vodka, if desired, and chopped rosemary in a 5-cup blender for 10 seconds or until slushy. Serve in sugar-rimmed glasses, and garnish, if desired.
4. 4
   Fix it Faster: Use 3 cups bottled ruby red grapefruit juice.
5. 5
   Note: For sugared rims, dip rims of stemmed glasses into a thin coating of light corn syrup or water, and then spin rims in a plateful of sparkling white sugar.