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Christmas Morning Breakfast Casserole pinterest

Christmas Morning Breakfast Casserole

This make-ahead breakfast casserole combines savory sausage, colorful vegetables, and cheese with a custard-like egg mixture. Prepare it the night before Christmas and simply bake it in the morning while you open presents with your family!
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Course: Breakfast
Cuisine: American
Keyword: Christmas breakfast, make-ahead breakfast, breakfast casserole, holiday breakfast, sausage breakfast casserole
Prep Time: 25 minutes
Cook Time: 55 minutes
Refrigeration Time: 8 minutes
Total Time: 1 hour 20 minutes
Servings: 12 servings
Calories: 315kcal

Equipment

  • 9x13 inch Baking Dish
  • Large Skillet
  • Mixing bowls

Ingredients

Base Ingredients

  • 1 pound breakfast sausage sweet or spicy, depending on preference
  • 1 medium onion finely diced
  • 1 red bell pepper chopped
  • 1 green bell pepper chopped
  • 2 cloves garlic minced
  • 8 large eggs
  • 2 cups whole milk
  • 1 teaspoon dried mustard powder
  • 1/2 teaspoon dried thyme
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 6 cups day-old bread cubed (sourdough or French bread works beautifully)

Cheese and Garnish

  • 2 cups sharp cheddar cheese shredded
  • 1/2 cup Parmesan cheese grated
  • 2 tablespoons fresh parsley chopped (for garnish)

Instructions

  • Coat a 9x13-inch baking dish with cooking spray or butter.
  • In a large skillet over medium heat, brown the breakfast sausage while breaking it into small crumbles with a wooden spoon (8-10 minutes) until no pink remains.
  • Add the diced onion, red and green bell peppers, and minced garlic to the sausage. Sauté until vegetables are tender and aromatic, about 5-7 minutes.
  • In a large bowl, whisk together the eggs, milk, mustard powder, thyme, salt, and pepper until well combined and slightly frothy.
  • Layer half the bread cubes in your prepared baking dish. Top with half the sausage-vegetable mixture and half the cheeses.
  • Repeat layers with remaining bread, sausage mixture, and cheese.
  • Pour the egg mixture evenly over the layered ingredients, ensuring all bread cubes are moistened. Gently press down on the top layer with a spatula to help the bread absorb the liquid.
  • Cover the casserole tightly with plastic wrap and refrigerate for at least 8 hours or overnight.
  • When ready to bake, preheat your oven to 350°F (175°C). Remove the casserole from the refrigerator while the oven heats up.
  • Bake uncovered for 45-55 minutes until the center is set and the top is golden brown. A knife inserted in the center should come out clean.
  • Let the casserole rest for 10 minutes before cutting. Garnish with fresh parsley before serving.

Notes

- The overnight soaking is crucial for the best texture - don't skip this step if possible.
- For a vegetarian version, omit the sausage and add 2 cups of sautéed mushrooms instead.
- Day-old bread works best as it absorbs the egg mixture better than fresh bread.
- Leftovers can be stored in the refrigerator for up to 3 days or frozen in individual portions for up to 2 months.
- The unbaked casserole can be frozen for up to 1 month; thaw in refrigerator for 24 hours before baking.

Nutrition

Calories: 315kcal | Carbohydrates: 17g | Protein: 18g | Fat: 21g | Sodium: 650mg | Fiber: 1g | Sugar: 4g
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