Breakfast Sausage Casserole (Print version)

Hearty baked breakfast with sausage, eggs, cheese, and bread cubes. Feeds 8, easy to prep ahead.

# What You'll Need:

→ Meats

01 - 1 pound breakfast sausage, casings removed

→ Vegetables & Aromatics

02 - 1 small yellow onion, finely chopped (optional)
03 - 1/2 red bell pepper, diced (optional)

→ Dairy & Eggs

04 - 8 large eggs
05 - 2 cups whole milk
06 - 2 cups shredded cheddar cheese
07 - 1/2 cup shredded mozzarella cheese

→ Bread

08 - 6 cups day-old bread, cut into 1-inch cubes (French or sourdough)

→ Seasonings

09 - 1 teaspoon salt
10 - 1/2 teaspoon black pepper
11 - 1/2 teaspoon dried mustard powder
12 - 1/4 teaspoon paprika

→ For Greasing

13 - Butter or nonstick spray

# Cooking Steps:

01 - Preheat the oven to 350°F. Grease a 9x13-inch baking dish with butter or nonstick spray.
02 - In a large skillet over medium heat, cook the sausage, breaking it up with a spoon, until browned and cooked through, about 5-7 minutes. If using, add onion and bell pepper; sauté until softened, 3-4 minutes. Drain excess fat.
03 - Spread the bread cubes evenly in the prepared baking dish. Top with the cooked sausage and vegetables, if used.
04 - In a large bowl, whisk together the eggs, milk, salt, pepper, mustard powder, and paprika until well combined.
05 - Stir in 1 1/2 cups cheddar cheese and all the mozzarella into the egg mixture.
06 - Pour the egg mixture evenly over the bread and sausage in the baking dish. Gently press the bread down so it soaks up the liquid.
07 - Sprinkle remaining cheddar cheese on top of the casserole.
08 - Cover with foil and bake for 30 minutes.
09 - Remove foil and bake another 15 minutes until golden and set in the center.
10 - Let rest for 10 minutes before slicing and serving.

# Expert Advice:

01 -
  • Feeds a crowd without leaving you trapped in the kitchen while guests arrive
  • Actually tastes better when made ahead, giving the bread time to soak up all those savory flavors
  • Leftovers reheat beautifully for breakfast throughout the week
02 -
  • Pressing the bread into the liquid is not optional—skipping this leaves you with dry, fluffy bread floating in scrambled eggs
  • The 10-minute rest period lets the custard finish setting, so your casserole holds its shape when served
  • Baking straight from the fridge requires an extra 10 minutes, but that extra chill time makes the flavors sing
03 -
  • Cut your bread into uniform cubes so everything bakes evenly—some pieces shouldnt be crunchy while others are custard-soft
  • Let the sausage cool slightly before combining with the eggs so you dont accidentally scramble them
  • Use a glass baking dish if you have one—it conducts heat more evenly than metal for this type of casserole
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