INGREDIENTS
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3 1/2 cups fresh blackberries
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1 1/2 cup sugar, divided
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2 teaspoon lemon juice
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1/2 teaspoon zest (optional)
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1/2 cup butter, melted
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1 1/2 cups all-purpose flour
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1 1/2 teaspoon baking powder
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1/2 teaspoon salt
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1 teaspoon vanilla
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1 cup milk