INGREDIENTS
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Yields 24 squares
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Ingredients:
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1/2 cup butter, softened
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1 cup granulated sugar
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1 egg
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1 egg white
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1 Tbsp sour cream
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1 tsp vanilla extract
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2 1/2 cups all-purpose flour
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1/2 tsp baking powder
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1/2 tsp salt
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1 recipe vanilla frosting, recipe follows
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