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4-Ingredient Sausage Breakfast Casserole

4-ingredient sausage breakfast casserole made with cubed bread, cooked sausage, eggs, and sharp cheddar, baked until golden and fully set. This simple breakfast bake produces a puffy sliceable casserole with a browned cheese top.
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Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings: 8 servings
Course: Breakfast
Cuisine: American
Calories: 540
Ingredients Equipment Method Notes

Ingredients
  

Sausage breakfast casserole components
  • 1 lb breakfast sausage Cooked and crumbled before assembling.
  • 8 eggs Large eggs.
  • 1.5 cup whole milk
  • 2 cup sharp cheddar Shredded, divided for topping.
  • 6 bread Cubed slices; any type.
  • 0.25 tsp salt To taste; use as needed in the egg mixture.
  • 0.25 tsp black pepper To taste; use as needed in the egg mixture.

Equipment

  • 1 sheet pan

Method
 

Prep and assemble
  1. Preheat oven to 375°F and grease a 9x13 baking dish so the casserole releases cleanly after baking.
  2. Spread the bread cubes evenly in the bottom of the dish to create a consistent base for soaking.
  3. Scatter the cooked sausage crumbles over the bread so you get sausage pieces in every bite.
  4. Whisk the eggs and whole milk together with salt and black pepper, then stir in 1.5 cups of the shredded sharp cheddar until smooth and evenly combined.
  5. Pour the egg mixture over the bread and sausage, pressing bread down to soak, then top with the remaining cheese so a golden crust forms.
Bake
  1. Bake at 375°F for 40–45 minutes until completely set and golden, with the center no longer jiggly and the top browned.

Notes

For best texture, let the casserole rest 5 minutes after baking so it sets up for clean scoops. Store covered in the refrigerator up to 4 days; reheat individual portions in the microwave. Freeze baked casserole slices up to 2 months (thaw overnight in the fridge). For a lower-fat option, use reduced-fat cheddar and/or lower-fat milk while keeping the bake time the same.