INGREDIENTS
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•1/2 cup butter
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•1/2 cup white sugar
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•1/4 teaspoon salt
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•1 teaspoon vanilla extract
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•2 egg yolks
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•1 1/2 cups all-purpose flour
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•1 teaspoon baking powder
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•1/3 cup milk
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•2 egg whites
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•1/4 cup white sugar
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•1 1/2 cups fresh blueberries
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•1 tablespoon all-purpose flour
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•1 tablespoon white sugar