Gather all ingredients and preheat the oven to 350°F (175°C).
In a large bowl, combine the cream of chicken soup, sour cream, grated Cheddar cheese, and dehydrated onion flakes.
Add the thawed hash browns to the mixture and stir until everything is well combined.
Pour the mixture into a 9×13-inch casserole dish and spread evenly.
Sprinkle the crushed potato chips over the top.
Bake uncovered in the preheated oven for about 45 minutes, or until the cheese is melted and the topping is crisp.
Remove from the oven and serve hot.