Grease a 9 x 13 baking dish and preheat your oven to 350℉.
In a large mixing bowl, dump in half of the thawed hash browns and set the bowl aside.
In a separate bowl, mix the cream soup, sour cream, onion, salt, pepper, melted butter, and cheese.
Pour half of the soup mixture over the potatoes and stir to combine. Then, add the rest of the hash browns and the remaining soup mixture. Stir again until everything is thoroughly combined.
Top with crushed corn flakes. Bake in the oven for 60 minutes or until bubbly and golden brown.