INGREDIENTS
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6 large sweet potatoes, peeled and cubed
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8 tablespoons (1 stick) unsalted butter
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1 cup flour
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1 cup dark brown sugar
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1 teaspoon salt
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4 tablespoons baking powder
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1 teaspoon cinnamon
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1 teaspoon nutmeg
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1 teaspoon allspice
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1 cup crushed pineapple, drained
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1 bag large marshmallows