Ingredients:
2 cups blackberries
2 cups ice cubes
1/2 cup fresh lime juice
3/4 cup white tequila
1/4 cup sugar
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Method - The Procedure
Puree blackberries in a blender. Force puree through a fine sieve into a small bowl and discard solids.

In a cocktail shaker, combine 1/2 cup puree and remaining ingredients and shake well. Strain drink into individual stemmed glasses.