INGREDIENTS
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1 cup butter, softened
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3/4 cup powdered sugar
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3/4 cup canned sweet potato puree
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2 teaspoons vanilla extract
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2 1/2 cups all-purpose flour
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1/4 teaspoon baking powder
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1/8 teaspoon salt
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1 teaspoon freshly grated nutmeg
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3/4 teaspoon ground cardamom
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1/2 teaspoon ground ginger
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1/2 teaspoon ground cinnamon
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Wax and parchment paper
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1 tablespoon Demerara sugar
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1/2 cup marshmallow crème
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1/2 cup butter, softened
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2 cups powdered sugar
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1 1/4 teaspoons meringue powder
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1 teaspoon vanilla extract