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christmas breakfast casserole

Cheesy Christmas Breakfast Casserole

A Christmas breakfast casserole brings that festive feeling straight to the table, creating a warm, cozy atmosphere for family and friends to gather around.
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Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Course Breakfast
Cuisine American
Servings 8 servings
Calories 380 kcal

Equipment

  • 9x13-inch baking dish
  • Mixing Bowl
  • Whisk
  • Frying pan
  • Cutting Board & Knife
  • Measuring Cups & Spoons
  • Aluminum Foil

Ingredients
  

For the Casserole

  • 8 large eggs
  • 2 cups whole milk
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • 1 teaspoon Dijon mustard optional, but adds a subtle zing

For the Filling

  • 2 cups shredded cheddar cheese
  • 1 cup cooked breakfast sausage crumbled
  • 1 cup cooked bacon chopped
  • 1 small onion finely diced
  • 1 red bell pepper diced
  • 2 cups day-old bread cubed (any hearty bread works)

For Topping

  • ½ cup shredded mozzarella
  • 1 tablespoon fresh parsley chopped (optional, for a pop of color)

Instructions
 

Step 1: Prepare the Ingredients

  • Preheat your oven to 350°F (175°C).
  • Dice the onion and red bell pepper into small pieces.
  • Cube the bread into roughly 1-inch pieces.
  • Cook the bacon until crisp, then chop into small pieces.
  • Cook the sausage until browned and crumbly. Drain any excess fat.
  • Pro Tip: If your bread is fresh, toast it lightly for 5 minutes. It helps soak up the egg mixture without turning mushy.

Step 2: Whisk the Egg Mixture

  • In a medium mixing bowl, combine the eggs, milk, salt, pepper, and Dijon mustard (if using).
  • Whisk continuously until fully combined and smooth.
  • Pro Tip: Whisk in a circular motion and make sure there are no streaks of egg whites left. This keeps your casserole creamy and uniform.

Step 3: Layer the Casserole

  • Grease your 9x13-inch baking dish lightly with butter or non-stick spray.
  • Spread the cubed bread evenly on the bottom.
  • Sprinkle the cooked sausage and bacon evenly over the bread.
  • Add the diced onions and bell peppers on top.
  • Pour the egg mixture evenly over everything.
  • Sprinkle the shredded cheddar cheese over the top.
  • Pro Tip: Press down gently on the layers so the bread soaks up some of the custard—this ensures a soft, fluffy center.

Step 4: Bake the Casserole

  • Cover the dish loosely with aluminum foil.
  • Bake in the preheated oven for 30 minutes.
  • Remove the foil, sprinkle mozzarella on top, and bake for an additional 15–20 minutes, until the cheese is melted and the casserole is set in the center.
  • Pro Tip: Insert a toothpick in the center—if it comes out clean, the casserole is perfectly cooked.

Step 5: Make-Ahead & Overnight Option

  • Assemble the casserole as directed but don’t bake.
  • Cover tightly with plastic wrap and refrigerate overnight.
  • In the morning, remove the plastic wrap, cover with foil, and bake for 45–50 minutes. Remove the foil for the last 10 minutes to melt the top cheese.
  • Pro Tip: Let the casserole sit for 5–10 minutes before slicing—it helps it hold together and makes serving easier.

Notes

Nutritional Value (per serving, approximately)

  • Calories: 380
  • Protein: 22g
  • Carbohydrates: 15g
  • Fat: 26g
  • Saturated Fat: 11g
  • Cholesterol: 240mg
  • Sodium: 820mg
  • Fiber: 1g
  • Sugar: 3g
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Nutrition Disclaimer:
The nutritional information provided on this website is an estimate only and is intended for general guidance. We cannot guarantee its accuracy and recommend consulting a qualified healthcare professional or registered dietitian for personalized nutrition advice.
Keyword breakfast casserole, cheesy christmas breakfast casserole