Preheat your oven to 350°F (175°C).

Thaw the frozen hash browns overnight in the refrigerator.

In a large mixing bowl, combine thawed hash browns, condensed soup, sour cream, chopped onions, shredded cheddar cheese, and melted butter.

Season the mixture with salt and pepper according to your taste.

Grease a 9x13-inch baking dish and spread the hash brown mixture evenly.

Mix crushed corn flakes with melted butter and sprinkle on top if desired.

Bake for 45 minutes until golden brown and bubbly.

Let it rest for about 10 minutes before serving.

Serve hot as a side or main dish.