Preheat the Oven
Preheat your oven to 350°F (175°C). This moderate temperature allows the casserole to cook evenly throughout, giving the hashbrowns time to become tender while preventing the cheese from burning.
Mix the Ingredients
In a large mixing bowl, combine the frozen hashbrown potatoes, cream of mushroom soup, Palmetto Cheese, sour cream, salt, and pepper. Mix thoroughly until all ingredients are well incorporated and evenly distributed. This ensures every bite has the perfect balance of flavors.
Transfer to Baking Dish
Transfer the mixture into a 9"x13" casserole dish and spread it evenly throughout the pan. Use a spatula to smooth the top for even cooking.
Add Topping and Bake
Sprinkle the crispy onions evenly over the top of the casserole. Place the dish in the preheated oven and bake at 350°F for 50 minutes, or until the casserole is bubbling around the edges and the top is golden brown.