Sweet Potato Layer Cake with Molasses Buttercream
INGREDIENTS
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For Cake: 2 large sweet potatoes (about 1 lb)
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3 cups cake flour
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3 teaspoons baking powder
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1 1/2 teaspoons cinnamon
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3/4 teaspoon grated nutmeg
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1/4 teaspoon ground cloves
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1/2 teaspoon salt 5 eggs, separated
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2 1/4 cups granulated sugar, divided 1 stickplus 2 tablespoons unsalted butter, room temperature
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1 1/2 teaspoons vanilla
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1 1/4 cups whole milk
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For Frosting:
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2 cups (4 sticks) unsalted butter, room temperature
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4 cups powdered sugar, sifted
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1/4 cup molasses
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1/4 cup milk or cream, more or less as needed
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