Mallow-Topped Sweet Potatoes

6 cups hot mashed sweet potatoes (prepared without milk and butter)
1 cup milk
6 tablespoons butter or margarine, softened
1/2 cup packed brown sugar
1 egg
1-1/2 teaspoons ground cinnamon
1-1/2 teaspoon vanilla extract
3/4 teaspoon ground allspice
1/2 teaspoon salt
1/4 teaspoon ground nutmeg
18 large marshmallows

In a large mixing bowl, beat the sweet potatoes, milk, butter, brown sugar, egg, cinnamon, vanilla, allspice, salt and nutmeg until smooth. Transfer to a greased shallow 2-1/2-qt. baking dish.

Bake, uncovered, at 325° for 40-45 minutes or until heated through. Top with marshmallows. Bake 5-10 minutes longer or until marshmallows just begin to puff and brown. Makes 10-12 servings.