Deluxe Mashed Potato Casserole
["10 large Idaho potatoes", "8 oz. sour cream", "2 (8 oz.) pkg. cream cheese, softened", "enough butter, milk and salt to mash potatoes"]
["Cook and mash potatoes.", "Add sour cream and cream cheese. Place in greased 9 x 13-inch baking dish.", "Smooth top of potatoes. May cover with bread crumbs and a little melted butter.", "Cover with foil.", "Bake in 375\u00b0 oven for 35 minutes.", "This dish may be frozen or refrigerated for later use, but must be cooked longer."]
["potatoes", "sour cream", "cream cheese", "butter"]