For four servings, gather these ingredients:
- 1 cup fresh grapefruit juice about 2 large grapefruits
- 1/4 cup simple syrup
- 1 bottle 750 ml chilled rosé wine
- 1 cup chilled club soda
- Ice cubes
- Grapefruit slices for garnish
Fresh grapefruit juice is best for flavor. You can adjust the simple syrup to taste.