Sweet Potato Casserole
["3 Tbsp. butter", "1/2 c. milk", "2 lb. sweet potatoes, cooked and peeled", "8 marshmallows"]
["Mix all ingredients, except marshmallows, in electric mixer. Bake for 30 minutes at 350\u00b0.", "Add marshmallows on top and bake for another 10 minutes."]
["butter", "milk", "sweet potatoes", "marshmallows"]