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-¾ cup unsalted butter softened -1 cup lightly packed brown sugar -½ cup granulated sugar -1 large egg -½ cup pure pumpkin puree -1 teaspoon pure vanilla extract -2 ¾ cups all-purpose flour -1 teaspoon baking soda -2 teaspoons cream of tartar -1 teaspoon pumpkin pie spice -½ teaspoon fine sea salt For the spiced sugar: -½ cup granulated sugar -1 teaspoon ground cinnamon -1 teaspoon pumpkin pie spice
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