I have no idea where I got this recipe, but it is a family favorite.
12 oz sour cream
1 cup milk
1/2 tsp. salt
1/4 tsp. pepper
1 can celery soup (vegetarians, make sure you read the label! Lots of cream based soups are NOT vegetarian)
1 can cream of potato soup
1 (10 oz) cheddar cheese
1 lb. hashbrowns (the shredded kind)
Onion (to taste)
Mix sour cream, seasonings, soups, milk, and 1/2 of cheese.
Combine in greased 9x12 baking dish with potatoes and onion.
Put rest of cheese on top and bake 1 1/2 hour (covered) at 350 degrees.