If you don’t have a cocktail shaker, use a glass jar with a lid.
Combine the rosemary and sugar with 1 cup water in a small saucepan. Bring to a boil, swirling occasionally to dissolve the sugar. Remove from the heat and let the rosemary infuse the sugar syrup for 10 minutes. Strain, discard the rosemary, and refrigerate until cold or up to 2 weeks. You’ll have enough syrup for many cocktails.
Fill a cocktail shaker half full of ice. Pour the grapefruit juice, gin, and 2 Tbs. of the rosemary syrup over the ice. Put the lid on the shaker and shake vigorously. Strain into two Champagne glasses and top each with a generous splash of sparkling wine (or club soda).
nutrition information (per serving):
0, Fat Calories
0, Saturated Fat
0, Monounsaturated Fat
12, Polyunsaturated Fat
Photo: Scott Phillips