Melt the butter and whisk it together with the sour cream, salt, and minced onion.
Add the sour cream mixture to a 9x13 inch baking dish along with the hashbrowns and cheese. Fold the ingredients together until fully combined.
Crush the corn flakes and sprinkle them over the top of the casserole.
Cook your casserole for 40-45 minutes, or until the edges of the dish are bubbly.
Serve and enjoy!
Notes
Store leftovers in the fridge for up to 4 days and reheat in the microwave. Store frozen uncooked and then thaw in the fridge before cooking according to the recipe directions.
The sour cream gives this casserole a creamy, rich texture.
For a spicier casserole you can ddo half cheddar half pepper jack cheese
In addition to corn flakes, you can use a mixture of bread crumbs and melted butter. This gives you a savory, but equally crunchy casserole topping
If you have a fresh white onion, you can use ¼ cup of diced onion instead of the dried minced onion.