This Christmas Breakfast Casserole brings together fluffy eggs soaked into bread cubes, savory sausage, sautéed peppers, and gooey cheeses for a festive morning feast. Baked until golden and bubbling, each square offers comfort and bright notes of fresh parsley that make holiday gatherings feel extra special. Whether you’re hosting a crowd or enjoying a cozy breakfast in pajamas, this make-ahead, cheesy egg bake is sure to become your new holiday tradition.
Key Ingredients
Here’s what you’ll need to assemble this hearty, festive casserole:
- 1 pound of breakfast sausage, crumbled: Crumbled and browned for savory bites that infuse every slice with rich, spiced flavor.
- 1 medium onion, diced: Adds sweetness and depth as it softens alongside the sausage.
- 1 red bell pepper, diced: Contributes bright color and a mild, sweet crunch.
- 8 large eggs: Create a fluffy, rich foundation that binds all the ingredients.
- 2 cups milk: Softens bread cubes and ensures a creamy, custard-like texture.
- 1 teaspoon salt: Enhances all the other flavors without overwhelming.
- 1/2 teaspoon black pepper: Delivers a subtle kick of warmth.
- 1 teaspoon garlic powder: Infuses warm, aromatic notes throughout each bite.
- 1 teaspoon dried mustard: Gives a gentle tang that brightens the overall taste.
- 8 slices of bread, cubed: Soaks up the egg mixture for tender, hearty bites.
- 1 cup shredded cheddar cheese: Melty, sharp flavor that forms a golden top.
- 1/2 cup shredded mozzarella cheese: Adds creamy stretch and mild richness.
- Fresh parsley, chopped (for garnish): Brightens with a pop of herbal freshness.
How To Make Christmas Breakfast Casserole
Let’s walk through creating this Christmas Breakfast Casserole, from prepping the sausage–pepper filling to whisking the egg mixture and layering everything in your baking dish. With simple steps and clear techniques, this beginner-friendly recipe delivers delicious, crowd-pleasing results every time. Gather your skillet, mixing bowl, and 9×13-inch pan, and let’s bake up some holiday magic!
1. Preheat your oven to 350°F (175°C). Ensuring the oven is fully heated guarantees even cooking and a perfect golden crust.
2. Cook the sausage: In a large skillet over medium heat, add the crumbled breakfast sausage and brown it, breaking it up with a spatula, about 5–7 minutes. Drain any excess grease to keep the casserole from becoming too oily.
3. Sauté onion and pepper: Add the diced onion and red bell pepper to the skillet with the sausage. Sauté for another 5 minutes, or until the veggies are tender and fragrant. Remove from heat and let cool slightly.
4. Whisk egg mixture: In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, and dried mustard until fully combined and a bit frothy.
5. Coat the bread cubes: Add the cubed bread to the egg mixture, stirring gently to ensure each piece is evenly coated.
6. Fold in cooked filling: Carefully fold the cooled sausage–vegetable mixture into the egg-and-bread base until everything is distributed.
7. Prepare the baking dish: Grease a 9×13-inch baking dish with cooking spray or butter to prevent sticking. Pour in the casserole mixture, spreading it into an even layer.
8. Add the cheeses: Sprinkle the shredded cheddar and mozzarella cheeses evenly over the top for that irresistible, molten finish.
9. Cover and bake: Cover the dish with aluminum foil and bake for 30 minutes to allow the eggs to set and the flavors to meld.
10. Uncover and finish baking: Remove the foil and continue baking for 15–20 minutes, or until the cheese is bubbly and the center is firmly set.
11. Rest before slicing: Once out of the oven, let the casserole rest for about 5 minutes—this helps it hold its shape when cut.
12. Serve with parsley: Slice into squares and garnish with fresh parsley for a pop of color and herbaceous zing.
Serving Suggestions
Once your Christmas Breakfast Casserole emerges golden and bubbly, it’s time to elevate the experience with delicious accompaniments and finishing touches. These serving suggestions will help you present each square with style, flavor balance, and a pop of holiday cheer. From pairing with sweet and savory sides to adding fresh textures, you’ll delight guests with every forkful and create a brunch spread that feels both festive and effortless. Whether you’re hosting a big crowd or enjoying a cozy family breakfast, these ideas ensure each bite is memorable. Feel free to mix and match according to your guests’ preferences and dietary needs.
- Fresh Fruit Platter: Arrange berries, melon, and grapes on the side for a light, colorful contrast to the rich casserole.
- Cranberry Compote: Spoon a sweet-tart compote over each slice to add a bright, festive zing.
- Crisp Green Salad: Pair with peppery arugula or baby spinach tossed in a lemon vinaigrette for extra freshness.
- Warm Holiday Drinks: Offer hot cocoa, spiced apple cider, or freshly brewed coffee to complement the savory flavors.
Tips For Perfect Christmas Breakfast Casserole
To make this Christmas Breakfast Casserole truly shine, start by choosing the protein that suits your crowd—whether that’s classic sausage, lean turkey sausage, or a plant-based alternative—and drain off any excess fat for a lighter finish. Amp up the veggie factor by stirring in fresh spinach or other greens, but remember to give them a quick sauté to prevent extra moisture from sogging the bake. If you’re short on time, assemble the casserole the night before and chill; letting it rest at room temperature for about 30 minutes before baking ensures even heating, so you’ll get a perfectly set center.
- Substitute Protein: Feel free to swap in turkey sausage or a plant-based alternative for a leaner casserole.
- Add Greens: Stir in spinach, kale, or chard after sautéing to boost color and nutrition without extra moisture.
- Make-Ahead Convenience: Assemble overnight, cover tightly, and refrigerate. Before baking, let it sit 30 minutes at room temperature to cut down on baking time.
How To Store It
Storing your Christmas Breakfast Casserole correctly ensures every reheated square tastes as delightful as the first slice. Whether you’re planning to enjoy leftovers over a few days or freeze portions for busy mornings, proper wrapping and temperature control will keep the casserole’s creamy texture and melty cheese intact. Follow these methods to maintain freshness, prevent freezer burn, and enjoy a stress-free breakfast whenever you need a flavorful pick-me-up.
- Refrigerator: Transfer cooled casserole slices into an airtight container and refrigerate for up to three days.
- Freezer (Unbaked): Wrap the assembled dish tightly in plastic wrap followed by foil, then freeze for up to one month. Thaw overnight in the refrigerator before baking.
- Freezer (Baked): After baking, let the casserole cool completely, then wrap individual squares or the whole tray in foil and store in the freezer.
- Thawing: Move a frozen, unbaked casserole to the refrigerator overnight. Before baking, let it sit at room temperature for about 30 minutes to ensure even cooking.
Frequently Asked Questions
Here are quick answers to the most common questions about this Christmas Breakfast Casserole:
- How long does it take to prepare and bake this Christmas Breakfast Casserole?
A: It takes about 15 minutes to prepare the ingredients, including cooking the sausage, sautéing the vegetables, and whisking the egg mixture, followed by 30 minutes of covered baking and an additional 15 to 20 minutes of uncovered baking, for a total of approximately 60 to 65 minutes.
- Can I assemble the casserole ahead of time?
A: Yes, you can assemble the casserole the night before, cover it tightly, and refrigerate overnight. Before baking, let it sit at room temperature for about 30 minutes to take off the chill, then bake according to the instructions, adding a few extra minutes if it’s still cold in the center.
- What are recommended substitutions for breakfast sausage?
A: You can substitute turkey sausage or a plant-based sausage alternative to reduce fat and calories. Cook any raw substitute completely before mixing it with the other ingredients. You could also use cooked bacon or diced ham for a different flavor profile.
- How should I store and reheat leftovers?
A: Store leftovers in an airtight container in the refrigerator for up to three days. To reheat, microwave individual portions for one to two minutes until heated through, or place them in a 350°F oven for 10 to 15 minutes.
- Is it possible to freeze this casserole?
A: Yes. You can freeze the assembled, unbaked casserole by wrapping it tightly in foil and plastic wrap and storing it for up to one month. Thaw it overnight in the refrigerator before baking as directed. Alternatively, you can bake it first, let it cool, wrap it, freeze it, and reheat in a 350°F oven for 25 to 30 minutes until warmed through.
- Can I add more vegetables or customize the flavors?
A: Absolutely. You can stir in vegetables such as fresh spinach, chopped broccoli, mushrooms, or zucchini. Be sure to sauté or wilt any added vegetables beforehand to avoid excess moisture. Adjust the seasoning and baking time slightly if you add high-moisture ingredients.
What Makes This Special
This Christmas Breakfast Casserole thrives on its foolproof layers of soft bread, spiced sausage, vibrant peppers, and melted cheeses, striking the perfect balance of comfort and festivity. Its make-ahead ease means you’ll spend less time in the kitchen and more time enjoying laughter around the table—just what the holidays are all about. Feel free to print and save this recipe for future celebrations, and let me know in the comments how it turned out or if you have any fun twists to share!
Christmas Breakfast Casserole
Description
Fluffy eggs soaked into bread cubes mingle with savory sausage, red pepper, and melty cheddar. Baked until golden, this comforting dish delivers warm flavors and a hint of bright parsley.
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, breaking it up with a spatula as it cooks, about 5-7 minutes. Drain any excess grease.
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Add the diced onion and red bell pepper to the skillet with the sausage. Sauté for another 5 minutes, or until the vegetables are tender. Remove from heat and let it cool slightly.
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In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, and dried mustard until well combined.
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Add the bread cubes to the egg mixture, stirring gently to coat all the bread evenly.
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Fold in the cooked sausage and vegetable mixture into the egg and bread mixture until combined.
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Grease a 9x13-inch baking dish with cooking spray or butter. Pour the casserole mixture into the prepared baking dish, spreading it evenly.
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Sprinkle the shredded cheddar and mozzarella cheese on top of the casserole.
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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 bubbly and the casserole is set in the middle.
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Once done, remove from the oven and let it rest for about 5 minutes before slicing it into squares.
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Serve hot, garnished with fresh parsley if desired.
Note
- Feel free to substitute the breakfast sausage with turkey sausage or a plant-based alternative for a lighter dish.
- Adding spinach or other greens can increase the veggie content while contributing additional flavors.
- This dish can be prepared the night before and stored in the refrigerator; simply let it sit at room temperature for about 30 minutes before baking.
