INGREDIENTS
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2 1/2 cups flour
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1/2 tsp baking powder
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1/2 tsp salt
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1/2 cup unsalted butter, softened
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1 cup sugar
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1 large egg
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2 TBS sour cream
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1 tsp vanilla extract
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Frosting:
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5 TBS butter, softened
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3 TBS milk
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1 TBS vanilla
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4 cups powdered sugar
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3-5 drops food coloring