1 lg. can sweet potatoes
1 tbsp. cinnamon
1 tbsp. butter
1/2 c. milk
1/2 bag miniature marshmallows

Heat and mash potatoes. Add cinnamon, butter, and milk; mix well. Grease Pyrex pan and add mixture. Cover with miniature marshmallows. Bake at 350 degrees for 30 minutes or until brown and crusty.