There are many versions of Funeral Potatoes. Some recipes call for adding cheese and using buttered bread crumbs on top. This is the “deluxe” casserole.
Heat the oven to 350 degrees F (175 degrees C). Butter a 9 x 13 x 2-inch or comparable casserole.
Topping
In a medium bowl, gently crush the cornflakes. Toss with the butter and set aside.
Casserole
Combine condensed soup, sour cream, 2 cups Cheddar cheese and onion flakes in a large bowl. Season to taste with salt and pepper. Gently mix in hash browns until well combined. Pour into the prepared casserole dish.
Sprinkle with remaining 1/2 cup Cheddar cheese and cornflakes.
Bake uncovered until cheese is melted and the top is crisp, about 45 minutes.