Raspberry Lime Rickey
3 cups frozen raspberries (one 12-ounce package)
2 cups sugar
½ cup water
4 teaspoons grated lime zest
½ cup juice from 4 limes
Seltzer or club soda, chilled
1. Make syrup: Heat raspberries, sugar, and water in saucepan over medium heat until raspberries begin to release their juices, about 5 minutes. Mash with potato masher until berries break down, then stir in lime zest and juice. Simmer until mixture is slightly thickened, about 5 minutes.
2. Pour raspberry mixture through fine-mesh strainer set over bowl, pressing on solids to extract liquid (you should have about 2 ½ cups). Discard berry solids. Refrigerate syrup until completely cool, at least 30 minutes or up to 1 week. To serve, combine 3/4 cup seltzer and 2 tablespoons syrup in tall, ice-filled glass.