Step 1: Prepare the Ingredients

1. Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish.
2. In a skillet over medium-high heat, cook the sausage until fully browned. Drain any excess fat.
3. In a large bowl, mix the softened cream cheese with the cooked sausage until well combined.
4. In the same skillet, sauté the frozen hashbrowns until lightly browned.

Step 2: Assemble the Casserole

1. Spread the sautéed hashbrowns evenly into the prepared baking dish.
2. Layer the sausage and cream cheese mixture over the hashbrowns.
3. Sprinkle the shredded cheese evenly over the sausage layer.
4. In a separate bowl, whisk together the eggs, milk, garlic powder, onion powder, salt, and pepper.
5. Pour the egg mixture over the layers in the baking dish, ensuring even coverage.

Step 3: Bake and Serve

1. Place the casserole in the preheated oven and bake for 40-50 minutes, or until the eggs are set and the top is golden brown.
2. Allow the casserole to cool for a few minutes before slicing.
3. Serve warm and enjoy!