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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2 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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1/4 tsp baking soda
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1/2 tsp salt
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1/4 cup butter, softened
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2 cups powdered sugar
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2 Tbsp cream or half and half
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1 tsp vanilla
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Several drops food coloring (optional)