INGREDIENTS
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For the cake:
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2 sticks unsalted butter, softened
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1 1/2 cups granulated sugar
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1/2 cup packed brown sugar
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3 eggs
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2 1/2 cups all-purpose flour
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1 tsp baking powder
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1/2 tsp baking soda
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1/2 tsp salt
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1 tsp vanilla
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1 cup sour cream