INGREDIENTS
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4 1/2cups flour
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2 1/4cups granulated sugar
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1 cup packed dark brown sugar
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1 teaspoon salt
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1 teaspoon ground cinnamon
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1/2teaspoon ground allspice
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4 (1 lb) unsalted butter, softened
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3 eggs
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1 1/2teaspoons pure vanilla extract
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1/2teaspoon baking soda
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1 cup sour cream or whole-milk yogurt, at room temperature
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Confectioners' sugar, for dusting