Creating the Crack Breakfast Casserole is a straightforward process. Just follow these simple steps:

1. Preheat the Oven: Set your oven to 350°F (175°C) to warm up while you prepare the casserole.
2. Brown the Sausage: In a large skillet, cook the ground breakfast sausage over medium heat until it’s browned. Drain any excess fat.
3. Grease the Baking Dish: Lightly grease a 9×13-inch baking dish with cooking spray or butter.
4. Layer Hash Browns: Spread the frozen hash brown potatoes evenly across the bottom of the baking dish.
5. Add Sausage: Evenly distribute the cooked sausage on top of the hash browns.
6. Sprinkle Cheese: Layer the shredded cheddar and mozzarella cheeses evenly over the sausage.
7. Whisk Eggs and Milk: In a large bowl, whisk together the eggs, whole milk, garlic powder, onion powder, salt, and black pepper until well combined.
8. Pour Egg Mixture: Carefully pour the egg mixture over the layered ingredients in the baking dish, ensuring everything is coated.
9. Bake: Place the casserole in the preheated oven and bake for 40-45 minutes or until the eggs are set and the top is golden brown.
10. Cool: Once baked, let the casserole cool for about 10 minutes before slicing.
11. Garnish (optional): For a fresh touch, sprinkle chopped green onions on top before serving.

These simple instructions guide you through making a delightful Crack Breakfast Casserole effortlessly.