Creating your own Cheesy Sausage Breakfast Casserole is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with cooking spray or butter.
2. Cook the Sausage: In a large skillet over medium heat, add the breakfast sausage. Cook until browned and fully cooked through, breaking it into crumbles as it cooks. Drain any excess grease.
3. Whisk Eggs and Milk: In a large mixing bowl, whisk together the eggs, milk, garlic powder, onion powder, salt, and pepper until fully combined.
4. Add Bread and Cheese: Add the cubed bread and 3 cups of shredded cheddar cheese to the egg mixture. Stir until the bread is well-coated.
5. Combine with Sausage: Gently fold in the cooked sausage until evenly distributed.
6. Transfer to Baking Dish: Pour the mixture into the greased baking dish, spreading it evenly.
7. Top with Cheese: Sprinkle the remaining 1 cup of cheddar cheese on top of the casserole.
8. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the casserole is set and the top is golden brown.
9. Cool and Serve: Remove from the oven and let it cool for about 5-10 minutes before slicing it into squares for serving.

These straightforward steps will guide you in creating a Cheesy Sausage Breakfast Casserole that everyone will enjoy!