Preheat the oven
Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.
Mix the casserole ingredients
In a large mixing bowl, combine the thawed hash browns, cream of chicken soup, sour cream, shredded cheddar cheese, melted butter, diced onion, garlic powder, paprika, salt, and pepper. Mix until all the ingredients are evenly combined.
Assemble the casserole
Transfer the hash brown mixture to the prepared baking dish. Spread it out evenly with a spatula.
Prepare the topping
In a small bowl, combine the crushed buttery crackers and melted butter. Sprinkle this mixture evenly over the top of the casserole.
Bake the casserole
Place the dish in the preheated oven and bake for 45-50 minutes, or until the casserole is bubbly and the topping is golden brown.
Serve and enjoy
Remove the casserole from the oven and let it cool slightly before serving. Pair it with your favorite protein or enjoy it as a stand-alone dish.