INGREDIENTS
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3 1/2 cups all-purpose flour
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1 1/2 teaspoons baking soda
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1/4 teaspoon kosher salt
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1 1/2 teaspoons ground ginger
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1 teaspoon ground cinnamon
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1/4 teaspoon ground cloves
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1/4 teaspoon ground allspice
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1 cup unsalted butter, at room temperature
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1 cup (firmly packed) dark brown sugar
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1/2 cup granulated sugar
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1 large egg
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1/4 cup molasses
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1/3 cup unsalted butter, at room temperature
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1/2 teaspoon pure vanilla extract
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1/8 teaspoon kosher salt
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1 1/2 cups confectioners' sugar
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1 tablespoon milk, plus more as needed