Cook onion in 1/2 the butter until onions are soft. Add salt, pepper, soup, and sour cream. Stir till mixed. Pour mixture over the hash browns which have been placed in a greased 9x13 casserole dish. Melt the remaining butter and mix with the corn flake crumbs and top the casserole. Bake at 350 F for 35-40 minutes.

better to take a kitchen form and stir the mixture into the hash browns to sort of coat all of them.