Christmas morning always feels a little different from any other morning of the year. The house smells like cinnamon, coffee, and something delicious baking in the oven. Someone is searching for a missing gift tag, wrapping paper covers half the living room, and everyone seems to wander into the kitchen asking the same question: “When is breakfast ready?”

That’s exactly why I love making a Christmas Breakfast Casserole.

Instead of standing over the stove flipping pancakes or preparing several different dishes while everyone waits, I can put together one hearty breakfast casserole, slide it into the oven, and enjoy the morning with my family.

The first time I made this recipe, I worried that the eggs would turn rubbery or the bread would become too soggy. I had tried a few breakfast casseroles before, and some turned out much better than others. After a little experimenting, I discovered that the secret lies in using slightly dry bread, allowing the egg mixture to soak in, and giving the casserole enough time to bake.

Now, this easy Christmas Breakfast Casserole has become one of my favorite holiday breakfast ideas.

It combines fluffy eggs, savory breakfast sausage, melted cheese, colorful vegetables, and soft pieces of bread in one delicious dish. The top turns beautifully golden, while the inside stays tender and flavorful.

Even better, you can prepare most of it the night before. That means less kitchen work on Christmas morning and more time enjoying breakfast, opening presents, and spending time with the people you love.

Whether you’re hosting a big family breakfast or planning a quiet holiday morning, this recipe deserves a place on your Christmas menu.

Why You’ll Love This Christmas Breakfast Casserole

There are plenty of reasons to make this casserole during the holidays, but these are the things I appreciate most.

• Perfect for busy Christmas mornings: Prepare everything the night before and bake it when you’re ready.
• Feeds a hungry crowd: One large baking dish makes enough breakfast for several family members or guests.
• Simple, everyday ingredients: You don’t need expensive or hard-to-find ingredients.
• Easy to customize: Change the meat, vegetables, or cheese to match your family’s preferences.
• Comfort food at its best: Every serving has fluffy eggs, savory sausage, tender bread, and plenty of melted cheese.

I also love that this recipe doesn’t require perfect presentation. Even if the edges brown a little more than expected or the cheese melts into an uneven golden layer, it still tastes wonderful.

That’s the kind of holiday cooking I enjoy most: delicious food without unnecessary stress.

Ingredients for Christmas Breakfast Casserole

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This recipe makes approximately 8 servings and uses a standard 9-by-13-inch baking dish.

Main Ingredients

• 8 large eggs: Eggs create the soft, fluffy base of the casserole.
• 2 cups whole milk: Adds moisture and gives the egg mixture a creamy texture. You can use 2% milk if preferred.
• 6 cups cubed bread: Use slightly stale white bread, French bread, or sourdough. Day-old bread works especially well.
• 1 pound breakfast sausage: Choose mild or spicy sausage depending on your preference.
• 2 cups shredded cheddar cheese: Adds a rich, cheesy flavor. Sharp cheddar gives the best flavor.
• 1/2 cup diced red bell pepper: Adds sweetness and a little Christmas color.
• 1/2 cup diced green bell pepper: Gives the casserole a fresh flavor and festive appearance.
• 1/2 cup finely chopped onion: Adds savory flavor.
• 2 tablespoons butter: For greasing the baking dish.

Seasonings

• 1 teaspoon garlic powder: Adds a gentle savory flavor.
• 1/2 teaspoon onion powder: Enhances the sausage and egg mixture.
• 1/2 teaspoon paprika: Adds warmth and a little color.
• 1/2 teaspoon salt: Adjust according to how salty your sausage and cheese are.
• 1/4 teaspoon black pepper: Adds a mild kick.
• 1 tablespoon chopped fresh parsley: Optional, for garnish.

Optional Add-Ins

If you enjoy extra flavor and texture, consider adding:

• 1/2 cup chopped mushrooms
• 1/2 cup baby spinach
• 1/4 cup chopped green onions
• 1/4 teaspoon red pepper flakes
• 1/2 cup cooked bacon pieces

You don’t need every optional ingredient. I usually stick with the sausage, peppers, onions, and cheddar because they create a familiar breakfast flavor that almost everyone enjoys.

Step-by-Step Instructions for Christmas Breakfast Casserole

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Follow these simple steps to prepare a breakfast casserole that comes out fluffy, cheesy, and golden.

Step 1: Prepare Your Baking Dish

Time: 5 minutes

Preheat your oven to 350°F (175°C).

Take a 9-by-13-inch baking dish and grease the bottom and sides with butter or nonstick cooking spray.

I prefer butter because it adds a little extra flavor and helps prevent the bread and eggs from sticking around the edges.

Set the dish aside while you prepare the filling.

Step 2: Cook the Breakfast Sausage

Time: 8–10 minutes

Place a large skillet over medium heat.

Add the breakfast sausage and break it into small pieces using a wooden spoon or spatula.

Cook until the sausage turns brown and no pink remains. Stir occasionally so the meat cooks evenly.

If the sausage releases a lot of grease, carefully drain the excess before using it.

Don’t skip this step. Raw sausage releases fat and moisture as it cooks, which can make the casserole greasy.

Transfer the cooked sausage to a plate and let it cool slightly.

Step 3: Prepare the Vegetables

Time: 4–5 minutes

Using the same skillet, add the chopped onion and bell peppers.

Cook them over medium heat for approximately 3–4 minutes, stirring occasionally.

You don’t need to cook them until completely soft. Just let them lose a little moisture and develop a slightly tender texture.

If you’re adding mushrooms, cook them at this stage too.

Remove the skillet from the heat.

Step 4: Layer the Bread, Sausage, and Vegetables

Time: 5 minutes

Cut your bread into small, roughly 1-inch cubes.

Spread the bread cubes evenly across the bottom of your prepared baking dish.

Next, scatter the cooked sausage over the bread.

Add the sautéed peppers and onions, distributing them evenly so every serving gets a little of everything.

Finally, sprinkle approximately 1 1/2 cups of shredded cheddar cheese over the top.

Keep the remaining 1/2 cup of cheese for later.

One little trick I learned is to spread the ingredients evenly instead of piling everything in the center. This makes a big difference when you cut and serve the finished casserole.

Step 5: Whisk the Egg Mixture

Time: 3 minutes

Crack the eight eggs into a large mixing bowl.

Add the milk, garlic powder, onion powder, paprika, salt, and black pepper.

Whisk everything together until the egg yolks and whites combine completely.

You should see a smooth, pale yellow mixture without large streaks of egg white.

Pour the mixture slowly over the bread, sausage, vegetables, and cheese.

Try to cover the entire dish rather than pouring everything into one spot.

Gently press the bread cubes down with the back of a spoon so they absorb some of the egg mixture.

Step 6: Let the Casserole Rest

Time: 15–20 minutes

Allow the casserole to rest for at least 15–20 minutes before baking if you plan to cook it immediately.

This gives the bread time to absorb the egg mixture.

If you’re preparing breakfast the night before, cover the baking dish tightly with plastic wrap or foil and place it in the refrigerator overnight.

I actually prefer the overnight method because the bread absorbs the mixture more evenly, and I can finish most of the preparation before Christmas morning begins.

Step 7: Bake Until Golden

Time: 40–50 minutes

Place the casserole in your preheated oven.

Bake uncovered for approximately 40–50 minutes, depending on your oven and the depth of your casserole.

During the last 10 minutes, sprinkle the remaining 1/2 cup of cheddar cheese over the top.

The casserole should look puffed and lightly golden around the edges. The center should feel set rather than liquid when you gently shake the dish.

For food safety, check the center with an instant-read food thermometer. The egg mixture should reach 160°F (71°C).

If the top browns too quickly before the center finishes cooking, loosely cover the dish with aluminum foil.

Step 8: Rest, Garnish, and Serve

Time: 10 minutes

Remove the casserole from the oven and let it rest for approximately 10 minutes.

This resting period helps the eggs settle and makes cutting neat portions much easier.

Sprinkle chopped fresh parsley over the top for a little color.

Cut into squares and serve while warm.

This Christmas Morning Breakfast Casserole Is the Perfect Make-Ahead Dish | Epicurious

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The first bite should have a little bit of everything: tender bread, fluffy eggs, savory sausage, sweet peppers, and melted cheddar.

It’s a simple combination, but it tastes like Christmas morning.

Pro Tips and Tricks for the Best Results

I’ve learned a few things from making breakfast casseroles over the years. These small details can make the difference between a casserole that turns out perfectly and one that feels too wet or too dry.

Use Day-Old Bread

Fresh bread contains more moisture, which can make the center of your casserole soggy.

Day-old bread works better because it absorbs the egg mixture without becoming overly soft.

If your bread is fresh, cut it into cubes and spread the pieces on a baking sheet. Leave them uncovered for a few hours or dry them in a low-temperature oven until they feel slightly crisp.

You don’t want hard croutons. Just bread with a little less moisture.

Don’t Overload the Casserole

It’s tempting to add extra sausage, vegetables, and cheese, especially when you’re cooking for a crowd.

However, too many fillings can throw off the egg-to-bread ratio.

Stick close to the quantities in the recipe the first time you make it. Once you understand the texture, you can experiment with additional ingredients.

Drain the Sausage Properly

This is one of the easiest mistakes to overlook.

If your sausage releases a lot of grease, drain it before adding it to the bread. Otherwise, the casserole may taste oily.

You still want the sausage to stay juicy, so don’t cook it until it becomes dry and crunchy.

Prepare It the Night Before

Christmas morning can get surprisingly busy.

I recommend assembling the casserole on Christmas Eve, covering it, and refrigerating it overnight.

When you’re ready to bake, remove it from the refrigerator while the oven preheats. Allowing it to sit out briefly helps take the chill off, but don’t leave it at room temperature for more than two hours.

If you bake it directly from the refrigerator, expect to need a little extra baking time. Always check the center temperature rather than relying on the clock alone.

Let It Rest Before Cutting

I know it’s tempting to serve breakfast immediately after removing the casserole from the oven.

However, giving it 10 minutes to rest helps the egg mixture settle and makes the slices hold together better.

It also prevents everyone from burning their mouths on the first bite!

Christmas Breakfast Casserole Variations and Substitutions

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One of the best things about this recipe is how easily you can change it.

Here are a few variations worth trying.

1. Vegetarian Christmas Breakfast Casserole

If you don’t eat meat, simply leave out the breakfast sausage.

Replace it with 1 cup of sautéed mushrooms, 1 cup of chopped spinach, and 1/2 cup of diced tomatoes.

You can also add a little extra cheddar or Monterey Jack cheese.

Cook the mushrooms first to release excess moisture. Otherwise, they can make the casserole watery.

This version tastes fresh and delicious, especially when you serve it with sliced avocado or fresh fruit.

2. Bacon and Cheddar Breakfast Casserole

For a smoky flavor, replace the breakfast sausage with 8–10 slices of cooked bacon.

Crumble the bacon into small pieces and layer it over the bread with the vegetables.

Use sharp cheddar cheese and add a little smoked paprika.

This variation is particularly good if your family enjoys classic bacon-and-eggs breakfasts.

3. Hash Brown Christmas Breakfast Casserole

If you prefer potatoes instead of bread, replace the bread cubes with approximately 4 cups of thawed frozen hash browns.

Spread the hash browns in the prepared dish, add the cooked sausage and vegetables, and pour the egg mixture over everything.

Use the same seasonings and cheese.

Because hash browns release moisture, thaw and drain them well before adding them to the dish.

The result has a heartier, potato-based texture that works beautifully for a holiday brunch.

4. Make It Gluten-Free

You can use your favorite gluten-free sandwich bread instead of regular bread.

Cut it into cubes and let it dry slightly before assembling the casserole.

Also, check the labels on your breakfast sausage and seasonings to make sure they don’t contain unwanted gluten ingredients.

Serving Suggestions

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This casserole is filling enough to serve on its own, but adding a few simple sides makes Christmas breakfast feel extra special.

Here are some of my favorite pairings.

Fresh Fruit Salad

A bowl of fresh fruit adds a refreshing contrast to the rich sausage, eggs, and cheese.

Try combining strawberries, blueberries, grapes, pineapple, and orange segments.

You can prepare the fruit the night before and keep it covered in the refrigerator.

Cinnamon Rolls

Christmas morning and cinnamon rolls seem like a natural match.

Serve warm cinnamon rolls alongside the casserole for a sweet and savory breakfast combination.

Store-bought rolls work perfectly well if you don’t want to spend extra time baking.

Crispy Breakfast Potatoes

If you’re serving a large group, crispy roasted potatoes make a satisfying side dish.

Season diced potatoes with olive oil, paprika, garlic powder, salt, and pepper.

Roast until the outside turns golden and the inside becomes tender.

Yogurt and Granola

For something lighter, serve small bowls of yogurt topped with granola and fresh berries.

This option gives guests another breakfast choice without requiring much preparation.

Holiday Drinks

Complete your Christmas breakfast table with a few festive drinks:

• Fresh orange juice
• Hot coffee
• Cinnamon-spiced tea
• Hot chocolate topped with whipped cream
• Warm apple cider

For a beautiful holiday presentation, arrange the casserole in the center of the table with fresh fruit, pastries, and warm drinks nearby.

It doesn’t need to look like a restaurant buffet. A cozy, welcoming breakfast table is more than enough.

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FAQ’s

Can I make Christmas Breakfast Casserole the night before?

Absolutely! This recipe works especially well as an overnight breakfast casserole.

Assemble the ingredients in your baking dish, pour the egg mixture over everything, and cover the dish tightly.

Refrigerate it overnight and bake it the following morning.

For the best texture, I recommend preparing it no more than 24 hours before baking. Check the center temperature to make sure it reaches 160°F (71°C).

How long does leftover breakfast casserole last in the refrigerator?

Store leftover casserole in an airtight container or cover the baking dish tightly.

Keep it refrigerated at 40°F (4°C) or below and enjoy it within 3–4 days.

For easier weekday breakfasts, divide the leftovers into individual portions before storing them.

How do I reheat breakfast casserole without drying it out?

The oven works well when you’re reheating several portions.

Place the leftovers in an oven-safe dish, cover loosely with foil, and heat at 325°F (163°C) until the center reaches 165°F (74°C).

For an individual serving, you can use a microwave. Heat in short intervals until the center becomes hot, checking between intervals to prevent overcooking.

Can I freeze Christmas Breakfast Casserole?

Yes, you can freeze the baked casserole.

Let it cool, divide it into individual portions, and place the portions in freezer-safe airtight containers.

Freeze for up to 2–3 months for the best quality.

Thaw frozen portions in the refrigerator overnight before reheating. Heat until the center reaches 165°F (74°C).

The texture may change slightly after freezing, but the casserole still makes a convenient breakfast.

Why did my breakfast casserole turn out watery?

A watery casserole usually comes from too much moisture in the ingredients.

Fresh bread, watery vegetables, undrained sausage, and frozen vegetables that haven’t thawed and drained properly can all contribute.

Use slightly dry bread, cook vegetables before adding them, drain excess sausage grease, and measure the milk carefully.

Also, make sure the casserole cooks long enough for the center to set.

Can I make this recipe without sausage?

Of course!

You can leave out the sausage and add sautéed mushrooms, spinach, extra bell peppers, or cooked potatoes.

If you prefer another type of meat, cooked bacon, diced ham, or cooked turkey sausage all work nicely.

Just make sure any meat you add has already cooked before you assemble the casserole.

Final Thought

Christmas mornings don’t need complicated menus or hours of preparation to feel special.

Sometimes, the best holiday memories happen around a simple breakfast table, with warm food, familiar faces, and everyone enjoying a little extra time together.

That’s why I keep coming back to this Christmas Breakfast Casserole. It’s easy to prepare, feeds a hungry family, and gives everyone something delicious to enjoy without keeping the cook busy in the kitchen all morning.

My favorite approach is to assemble everything on Christmas Eve, refrigerate the dish, and bake it while the family enjoys the excitement of the morning.

By the time breakfast is ready, the kitchen smells wonderful, the cheese has melted into a golden topping, and everyone is ready to grab a plate.

If you try this recipe, I’d love to hear how it turns out!

Did you use sausage, bacon, or a vegetarian filling? Did your family add any special ingredients? Leave a comment and share your favorite version.

Here’s to a cozy Christmas morning, a delicious breakfast, and plenty of happy holiday memories!