INGREDIENTS
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3⁄4 cup butter, room temperature
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1 1⁄2 cup white sugar
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3 egg
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1 tsp vanilla extract
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1 cup sour cream
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2 1⁄2 cup all-purpose flour
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1 tsp baking soda
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1 tsp baking powder
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1⁄4 cup brown sugar, packed
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1 tbsp ground cinnamon
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1⁄4 cup walnuts, chopped (optional)