Tuna casserole made with Campbell's soup typically consists of soup, tuna, noodles, milk and seasonings baked until bubbling, which typically takes between 20 and 30 minutes. CampbellsKitchen.com and RecipeLion.com both offer variations on the dish.
Campbell's tuna noodle casserole recipe calls for using either regular or reduced fat cream of mushroom soup and augmenting the basic recipe with peas and pimentos. The cook tops this version with buttered bread crumbs for a crispy finish. CampbellsKitchen.com also provides several variations, including a topping of French fried onions or substituting cream of celery soup for the cream of mushroom soup. It also suggests using this recipe to make a chicken casserole.
RecipeLion.com provides a very basic recipe which requires only four ingredients. In addition to the noodles, tuna and milk, the recipe uses Campbell's cream of potato soup. The site states that this recipe is ideal for picky eaters who may dislike mushrooms and celery. It also offers possible additions such as carrots, soy sauce and peas.
An alternate RecipeLion recipe suggests the inclusion of cheddar cheese in the casserole. The cook mixes cheese through the filling, then tops the dish with paprika and more cheese. This version uses Campbell's cream of celery soup and utilizes peas for additional texture.