INGREDIENTS
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2 1/4 cups all-purpose flour
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1 teaspoon baking powder
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2 teaspoons ground nutmeg
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1 teaspoon ground cinnamon
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1/2 cup white sugar
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3/4 cup brown sugar
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3/4 cup (1 1/2 sticks) unsalted butter, softened
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2 egg yolks
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1/2 cup eggnog
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1 teaspoon vanilla extract
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1 stick unsalted butter, softened
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3 cups powdered sugar (plus more if needed)
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1/4 cup eggnog (plus more if needed)
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1/2 teaspoon nutmeg
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1/4 teaspoon ground cinnamon
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1/4 teaspoon rum extract (optional)