Loaded breakfast casserole bakes eggs, sausage, cheese, and bread into a make-ahead family brunch favorite. This protein-packed dish feeds a crowd and is perfect for holiday mornings and weekend gatherings.
Preheat oven to 350°F and lightly grease a 9x13-inch baking dish to ensure easy release and prevent sticking.
Brown the sausage in a skillet over medium heat, breaking it into crumbles and cooking until fully cooked; drain excess fat for balanced texture.
Tear or cut the bread into 1-inch cubes and layer evenly in the baking dish, allowing for uniform absorption.
In a large mixing bowl, whisk together eggs, milk, salt, pepper, and parsley. Stir in half of the cheese for richer binding.
Scatter cooked sausage over bread, pour the egg mixture evenly across the dish, and top with remaining cheddar. Press gently so bread absorbs moisture without compressing.
Bake for 40–45 minutes, uncovered, until the center is set and the top is golden; let rest 10 minutes before slicing for optimal structure.