Gather all ingredients. Preheat the oven to 350 degrees F (175 degrees C).
Combine condensed soup, sour cream, Cheddar cheese, and onion flakes in a large bowl.
Mix in hash browns until well combined.
Pour into a 9x13-inch casserole dish. Sprinkle with potato chips.
Bake uncovered in the preheated oven until cheese is melted and the top is crisp, about 45 minutes.
