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.
Here’s what you’ll need to assemble this hearty, festive 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 9x13-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 9x13-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.
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.
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.
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.
Here are quick answers to the most common questions about 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.
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.
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.
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.
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.
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.
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!
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.
Hi, I'm Matthew Roberts, founder of Food Recipes USA! As a culinary historian and fourth-generation restaurateur, I've dedicated my life to preserving, celebrating, and evolving the rich tapestry of American cuisine.