4 pounds sweet potatoes (about 5 large), peeled and cubed
1cup2% milk
1/2cup packed brown sugar
6tbspsoftened butter
1lightly beaten egg
1 1/2tsp ground cinnamon
1 1/2tsps vanilla extract
3/4tsp ground allspice
1/2tsp salt
1/4tsp ground nutmeg
18large marshmallows
Instructions
Place sweet potatoes in a large saucepan; cover with water. Bring to a boil. Reduce heat; cover and cook until tender, 15-20 minutes; drain.
Transfer to a large bowl and mash. Add the milk, brown sugar, butter, egg, cinnamon, vanilla, allspice, salt and nutmeg; beat until smooth.
Transfer to a greased shallow 2-1/2-qt. baking dish. Bake, uncovered, at 350° until heated through, 40-45 minutes. Top with marshmallows. Bake just until marshmallows begin to puff and brown, 5-10 minutes longer.