This Christmas Breakfast Casserole is the ultimate festive morning treat that layers savory sausage, crisp bell peppers, and melty cheddar into pillowy cubes of day-old bread for a truly comforting holiday feast. With make-ahead magic, you can assemble it the night before, let those flavors mingle overnight, then bake it to a golden, bubbly perfection that will have everyone gathering around the table in delight. Whether you’re hosting family or just craving something hearty, this beginner-friendly dish promises a merry start to your holiday morning.
Key Ingredients
Gather these simple, flavorful components to build your festive breakfast bake:
- 1 pound breakfast sausage, crumbled: savory protein that browns to add a rich, hearty flavor.
- 1 cup diced onion: aromatic sweetness that softens and complements the sausage.
- 1 cup diced bell pepper (any color): colorful crunch that brightens each bite.
- 8 large eggs: binding agent that transforms the layers into a custardy bake.
- 1 cup milk: moistens and enriches the egg mixture for a tender texture.
- 1 teaspoon salt: balances and enhances all the flavors.
- 1/2 teaspoon black pepper: adds a gentle warmth and depth.
- 1 teaspoon dried mustard: subtle tang that lifts the egg custard.
- 2 cups shredded cheddar cheese: gooey, melty layer that brings richness and cheesiness.
- 5 cups cubed day-old bread (such as sourdough or French bread): sturdy base that soaks up the egg mixture without turning mushy.
- 1/4 cup chopped fresh parsley (optional, for garnish): fresh herb finish that adds color and brightness.
How To Make Christmas Breakfast Casserole
This casserole comes together in layers of bread, sausage-veggie mix, cheese, and a seasoned egg custard, all baked until golden and bubbling. The magic happens when the bread soaks up that rich egg mixture, delivering each slice with creamy, melt-in-your-mouth goodness. Follow these steps to get holiday-worthy results:
1. Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish with cooking spray or butter to prevent sticking and ensure easy cleanup.
2. In a large skillet over medium heat, cook the crumbled breakfast sausage until browned and cooked through, about 5–7 minutes, stirring occasionally to break it into small, even pieces.
3. Add the diced onion and bell pepper to the skillet, then cook for 3–5 more minutes until the vegetables are softened and fragrant.
4. In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, and dried mustard until the mixture is smooth and well combined.
5. In the greased baking dish, layer half of the cubed bread evenly across the bottom to form a sturdy base.
6. Spread the sausage and vegetable mixture over the bread layer, then sprinkle half of the shredded cheddar cheese on top.
7. Pour half of the egg mixture evenly over the sausage and cheese, ensuring it seeps into all the nooks.
8. Repeat the layering process with the remaining bread cubes, sausage-veggie mix, and cheddar cheese.
9. Pour the rest of the egg mixture over everything, then press down gently with a spatula to fully submerge any dry bread pieces.
10. Cover the dish with aluminum foil and let it rest in the refrigerator for at least 30 minutes—or overnight—to allow the bread to absorb the custard.
11. If chilled overnight, remove the casserole from the fridge and let it sit at room temperature for about 30 minutes before baking to ensure even cooking.
12. Bake covered for 30 minutes, then uncover and bake an additional 15–20 minutes until the center is set and the top is golden and bubbly. Let it cool for 5–10 minutes, then garnish with fresh parsley before serving.
Serving Suggestions
Elevate each slice of this Christmas Breakfast Casserole with thoughtful pairings that balance its richness and celebrate holiday flavors:
- Crisp Mixed Green Salad: A simple salad of baby greens, cucumber ribbons, and a lemon-dijon vinaigrette cuts through the casserole’s richness and adds freshness.
- Fresh Fruit Platter: Seasonal fruits like pomegranate seeds, orange segments, and kiwi bring a juicy, sweet contrast to the savory bake.
- Warm Cranberry Sauce: A spoonful of tart-sweet cranberry sauce echoes festive notes and adds a zingy pop with every bite.
- Fluffy Dinner Rolls: Soft, buttery rolls are perfect for mopping up any leftover custard and making mini breakfast sandwiches.
Tips For Perfect Christmas Breakfast Casserole
Getting this make-ahead marvel just right is all about timing and creativity. Plan ahead, customize to your taste, and be prepared for rave reviews!
- Prepare the casserole the night before and bake it first thing in the morning for a stress-free holiday start.
- Customize the vegetable mix by adding spinach, sliced mushrooms, or your favorite seasonal veggies right alongside the onion and pepper.
- For extra heat, stir in diced jalapeños or swap in spicy sausage to kick up the flavor.
- Store any leftovers in an airtight container in the fridge, then reheat individual portions in the microwave for 1–2 minutes.
How To Store It
Ensuring your casserole stays as delicious the next day means proper cooling and storage. Follow these methods to lock in freshness:
- Refrigerate Overnight: After covering with foil, chill the assembled casserole for up to 24 hours before baking. Flavors meld beautifully during this rest.
- Cool Before Storing: Once baked, allow the casserole to sit for 5–10 minutes, then transfer leftovers to an airtight container to preserve moisture.
- Refrigerate Leftovers: Keep in the fridge for 3–4 days. Reheat portions in the microwave for 1–2 minutes or warm in a 350°F oven for 10–15 minutes, covered.
- Freeze for Later: Slice into serving pieces, wrap each tightly in foil, and freeze up to 2 months. Thaw overnight in the fridge before reheating.
Frequently Asked Questions
Here are answers to your top questions about making the perfect Christmas Breakfast Casserole:
- How long does it take to prepare this Christmas Breakfast Casserole?
It takes about 20–25 minutes to prepare the casserole, which includes browning the sausage, sautéing the onions and bell pepper, whisking together the eggs and seasonings, and layering the bread, meat mixture, cheese, and egg mixture in the baking dish.
- Can I prepare the casserole the night before and bake it in the morning?
Yes, you can assemble the casserole, cover it with foil, and refrigerate it overnight. Before baking, allow it to sit at room temperature for about 30 minutes, then bake covered for 30 minutes and uncovered for an additional 15–20 minutes until the top is golden and the center is set.
- What types of bread work best for this recipe?
Day-old sourdough or French bread work best because they hold their shape and absorb the egg mixture without becoming mushy. If using fresh bread, lightly toast the cubes first to prevent them from getting too soggy.
- How can I customize or add more vegetables to the casserole?
You can substitute or add vegetables such as spinach, sliced mushrooms, chopped tomatoes, or diced jalapeños. Cook them with the onion and bell pepper until they are tender and any excess moisture has evaporated before layering with the other ingredients.
- How do I know when the casserole is fully cooked?
The casserole is done when the center is set and no longer jiggles, the top is golden and bubbly, and a knife inserted into the center comes out clean. For extra assurance, the internal temperature should reach 160°F (71°C).
- Can I substitute the breakfast sausage for other proteins or vegetarian options?
Yes. You can use crumbled bacon, diced ham, or shredded cooked chicken. For a vegetarian version, try seasoned meatless crumbles or firm tofu crumbles, making sure to cook and drain them well before layering.
- What is the best way to store and reheat leftovers?
Store leftovers in an airtight container in the refrigerator for up to 3–4 days. To reheat, microwave individual portions for 1–2 minutes or warm in a 350°F (175°C) oven for 10–15 minutes, covered to retain moisture.
What Makes This Special
This Christmas Breakfast Casserole shines because it’s both a crowd-pleaser and a breeze to prep ahead—perfect for busy holiday mornings. The combination of savory sausage, sweet peppers, and gooey cheddar tucked into custard-soaked bread creates a festive flavor fest in every forkful. It’s so easy and reliable that you’ll want to print this recipe and tuck it into your holiday binder for years to come. If you whip it up this season, drop a comment or question below—I’d love to hear how it turns out and any fun twists you try!
Christmas Breakfast Casserole
Description
This make-ahead casserole marries seasoned sausage, sautéed peppers, and gooey cheddar with soft, soaked bread cubes. After an overnight chill, it bakes to a golden, bubbly top, filling your kitchen with irresistible morning aromas.
Ingredients
Instructions
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Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking dish with cooking spray or butter to prevent sticking.
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In a large skillet over medium heat, cook the crumbled breakfast sausage until browned and cooked through. This should take about 5-7 minutes. Stir occasionally to break up the sausage into small pieces.
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Add the diced onion and bell pepper to the skillet with the sausage. Cook for an additional 3-5 minutes until the vegetables are softened.
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In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, and dried mustard until well combined.
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In the greased baking dish, layer half of the cubed bread evenly across the bottom.
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Spread the sausage and vegetable mixture over the layer of bread, followed by half of the shredded cheddar cheese.
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Pour half of the egg mixture over the sausage and cheese layer, then repeat the layering process with the remaining cubed bread, sausage and vegetable mixture, and cheese.
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Pour the remaining egg mixture on top, ensuring all the bread is soaked. Press down gently with a spatula to submerge any dry bread pieces.
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Cover the baking dish with aluminum foil and let it sit in the refrigerator for at least 30 minutes or overnight for the bread to absorb the egg mixture.
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If refrigerated overnight, remove from the fridge and let it sit at room temperature for about 30 minutes before baking.
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Bake covered with foil for 30 minutes. Remove the foil and bake for an additional 15-20 minutes, or until the casserole is set and the top is golden and bubbly.
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Once done, remove from the oven and let it cool for 5-10 minutes. Garnish with chopped fresh parsley before serving.
Note
- This casserole can be prepared the night before and baked in the morning for convenience.
- You can customize the vegetables to include spinach, mushrooms, or your favorites.
- For a spicier kick, consider adding diced jalapenos or using spicy sausage.
- Leftovers can be stored in an airtight container in the refrigerator and reheat well in the microwave.
