- 3/4 cup thawed frozen unsweetened tamarind purée
- 2 cups water
- 3/4 cup sugar, or to taste
- 2 1/2 cups diced fresh mangoes (from 2 large)
- 1 (750-ml) bottle chilled dry white wine
- 1/3 cup tequila (preferably reposado)
- 1 cup halved green and red seedless grapes
- Purée tamarind, water, sugar, and 1 1/2 cups mangoes in a blender until mixture is smooth. Pour through a medium-mesh sieve into a pitcher and stir in wine, tequila, grapes, and remaining cup mangoes. Chill, covered, until ready to serve, up to 24 hours. Serve over ice.