Bright, festive mornings call for a breakfast that feels like a holiday hug, and this Christmas Breakfast Casserole delivers just that. Hearty layers of savory sausage, fluffy eggs, sautéed peppers, and crisp bread cubes come together under a blanket of melting cheddar. It’s a make-ahead dream that lets you sleep in or entertain with ease, plus it’s endlessly customizable. Keep reading to see how this savory casserole can brighten your holiday morning and feed a crowd without all the fuss.
Key Ingredients
To make this festive breakfast bake shine, you’ll need a handful of simple ingredients that layer flavor and texture in every bite.
- 1 lb breakfast sausage, crumbled: A savory, spiced base that infuses the entire casserole with rich, meaty goodness.
- 1 medium onion, diced: Adds a sweet, aromatic bite that balances the richness of the sausage.
- 1 red bell pepper, diced: Brings a pop of color and gentle sweetness to the savory mix.
- 8 large eggs: The custardy glue that holds all the layers together with creamy, protein-packed richness.
- 2 cups milk: Lightens the egg mixture for a tender, moist bake throughout.
- 1 tsp salt: Enhances all the flavors and keeps the custard perfectly seasoned.
- 1/2 tsp black pepper: Adds a mild heat and depth to the egg mixture.
- 1/2 tsp garlic powder: Infuses a gentle, savory note without overpowering.
- 1/2 tsp dried oregano: Brings a hint of herbaceous warmth for complexity.
- 1/2 tsp dried thyme: Lends an earthy, floral accent that pairs beautifully with sausage.
- 8 slices of bread, cubed (preferably crusty or stale): Absorbs the egg custard, creating tender, flavorful pockets.
- 2 cups shredded cheddar cheese: Melts to gooey perfection, topping the casserole with sharp, creamy goodness.
- 1 cup diced tomatoes (optional): Adds freshness and bright, juicy bursts in every bite.
- Fresh parsley for garnish (optional): A fresh, herbaceous touch that livens up each slice.
How To Make Christmas Breakfast Casserole
Follow these straightforward steps to assemble a festive breakfast that practically bakes itself while you sip your coffee. The layers of bread, sausage, vegetables, and cheese soak in a seasoned egg custard, making each forkful a comforting, savory delight. With simple prep and minimal hands-on time, you’ll have a showstopping casserole ready to serve in just about an hour.
1. Preheat your oven to 350°F (175°C) to ensure even, gentle baking.
2. In a large skillet over medium heat, cook the crumbled breakfast sausage for about 6–8 minutes, stirring occasionally, until nicely browned and cooked through. Drain any excess grease.
3. Add the diced onion and red bell pepper to the skillet and sauté for 3–4 minutes, until the vegetables are tender and fragrant.
4. In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, oregano, and thyme until the mixture is smooth and well combined.
5. Grease a 9×13-inch baking dish, then spread the bread cubes evenly across the bottom to form a base layer.
6. Distribute the cooked sausage and vegetable mixture over the bread, ensuring even coverage.
7. Pour the seasoned egg mixture over the layers, pressing lightly so the bread absorbs the custard.
8. If using, sprinkle the diced tomatoes over the top for a fresh burst of flavor.
9. Top everything with the shredded cheddar cheese, spreading it into an even layer.
10. Cover the dish with aluminum foil and bake for 30 minutes, allowing the casserole to set.
11. Remove the foil and bake for an additional 15–20 minutes, until the cheese is melted and the center is fully set.
12. Let the casserole cool for a few minutes, garnish with fresh parsley if desired, then slice and serve warm.
Serving Suggestions
This breakfast casserole plays nicely with a range of sides and accompaniments, turning a simple bake into a festive spread. Whether you’re hosting overnight guests or feeding a hungry crowd, these ideas will elevate your Christmas morning feast.
- Serve each slice with a dollop of sour cream and a sprinkle of fresh parsley for a creamy, tangy lift.
- Plate alongside a bowl of seasonal fruit salad, like citrus segments and pomegranate seeds, to balance savory richness with bright sweetness.
- Offer warm buttermilk biscuits or flaky croissants for dunking into the gooey cheese and custard.
- Pair with a pot of spiced holiday coffee or a pitcher of homemade iced peppermint mocha for a festive beverage twist.
Tips For Perfect Christmas Breakfast Casserole
With just a few friendly pointers, you’ll make this casserole even more delicious and stress-free. These easy tweaks and variations will help you customize the bake to your taste and schedule.
- For added flavor, consider using spicy sausage or flavored bread to give the casserole an extra kick or aromatic twist.
- This casserole can be assembled the night before; just refrigerate it uncooked, covered tightly with foil, then bake in the morning.
- Customize with your favorite vegetables, such as spinach, mushrooms, or zucchini, by stirring them in with the sausage and peppers.
- Perfect for serving a crowd; simply double the recipe and use a larger baking dish (or two 9×13 pans) to feed more hungry guests.
How To Store It
Leftovers and make-ahead plans are a breeze with this forgiving holiday bake. Store and reheat like a pro to keep every slice tasting just as good as the day it came out of the oven.
- Refrigerator: Cool completely, then transfer slices to an airtight container. Store for up to 3 days and reheat individual portions in the microwave for 1–2 minutes or in a 350°F oven for 10–12 minutes.
- Freezer: Wrap the fully baked and cooled casserole tightly in foil or place it in a freezer-safe container. Freeze for up to 2 months, then thaw overnight in the fridge before reheating at 350°F for 20–25 minutes.
- Make-Ahead: After assembling but before baking, cover the dish with foil and refrigerate for up to 24 hours. Bake straight from the fridge—add 5–10 extra minutes if it’s very cold.
- Reheating Tips: To revive that just-baked crispiness, bake uncovered in a preheated 350°F oven until warmed through and the cheese is gooey again.
Frequently Asked Questions
Here are some quick answers to common questions about this festive breakfast bake:
- How long does it take to prepare this Christmas Breakfast Casserole from start to finish?
You’ll need about 15 minutes to brown the sausage, sauté the vegetables, whisk the egg mixture, and layer the ingredients. The casserole then bakes covered for 30 minutes and uncovered for an additional 15–20 minutes. In total, plan for roughly 1 hour from start to finish, including a brief rest before serving.
- Can I assemble the casserole the night before and bake it in the morning?
Yes. After layering the cubed bread, sausage-vegetable mixture, egg custard, tomatoes, and cheese, cover the dish tightly with foil and refrigerate overnight. In the morning, remove the casserole from the fridge while the oven preheats to 350°F, then bake as directed. You may need an extra 5–10 minutes of baking time if the casserole is cold.
- What are good substitutions or additions for this recipe?
For a spicier version, use hot breakfast sausage or chorizo. To add greens, stir in fresh spinach or kale with the sautéed vegetables. Sliced mushrooms, zucchini, or even cooked bacon work well too. For a different cheese profile, substitute pepper jack, Swiss, or Gruyère for the cheddar.
- How should I store and reheat leftovers?
Store any cooled leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place individual portions in a microwave-safe dish and microwave for 1–2 minutes, or warm a piece in a 350°F oven for about 10–12 minutes until heated through and the cheese is melty.
- Can I freeze the casserole, and if so, how do I reheat it?
Yes, freeze the fully baked and cooled casserole in a tightly sealed container or wrapped in foil for up to 2 months. To reheat, thaw overnight in the refrigerator, then bake at 350°F for 20–25 minutes, uncovered, until heated through.
- Why is my casserole sometimes soggy in the center, and how can I prevent that?
Sogginess often comes from too much liquid or undercooked bread. Make sure to use slightly stale or crusty bread, which absorbs the egg mixture better. Drain excess grease from the sausage thoroughly and ensure the egg mixture is well whisked but not overly runny. Baking uncovered for the final 15–20 minutes also helps set the center.
- What is the best way to scale this recipe for a larger crowd?
To serve more people, simply double all ingredients and use a larger baking dish (such as two 9×13-inch pans or a single 13×18-inch pan). Keep the same baking temperature (350°F) and check for doneness after 30 minutes covered; you may need an extra 5–10 minutes uncovered for the thicker casserole to set fully.
What Makes This Special
This festive casserole brings together everyday ingredients in a fun, customizable way—its layers of sausage, bread cubes, veggies, and cheese soak up a perfectly seasoned egg custard for a crowd-pleasing holiday breakfast. Whether you’re racing around Christmas morning or hosting an overnight stay, its make-ahead magic and hearty flavors deliver comfort on a plate. Feel free to print this recipe and save it for next year, then let me know in the comments how it turned out or if you have any questions—I’m here to help you nail that golden, cheesy top every time!
Christmas Breakfast Casserole
Description
A comforting bake combining spicy sausage, sautéed peppers, and fluffy eggs soaked into crusty bread cubes, all topped with melting cheddar for a warm, festive breakfast.
Ingredients
Instructions
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Preheat your oven to 350°F (175°C).
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In a large skillet over medium heat, cook the crumbled breakfast sausage until browned and cooked through, about 6-8 minutes. Drain excess grease if necessary.
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Add the diced onion and red bell pepper to the skillet with the sausage. Sauté for an additional 3-4 minutes until the vegetables are softened.
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In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, oregano, and thyme until well combined.
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In a greased 9x13 inch baking dish, spread the cubed bread evenly across the bottom.
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Evenly distribute the sausage and vegetable mixture over the bread cubes.
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Pour the egg mixture over the bread and sausage, ensuring everything is coated evenly.
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If using, sprinkle diced tomatoes over the top of the casserole.
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Top the casserole with shredded cheddar cheese, spreading it out to cover the entire surface.
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Cover the baking dish with aluminum foil and bake in the preheated oven for 30 minutes.
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After 30 minutes, remove the foil and bake for an additional 15-20 minutes, or until the cheese is melted and the center is set.
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Remove from the oven and let cool for a few minutes before slicing. Garnish with fresh parsley if desired, and serve warm.
Note
- For added flavor, consider using spicy sausage or flavored bread.
- This casserole can be made the night before; just refrigerate it uncooked, covering it tightly with foil.
- Customize with your favorite vegetables, such as spinach, mushrooms, or zucchini.
- Perfect for serving a crowd; simply double the recipe and use a larger baking dish!
