Christmas Breakfast Casserole (with Vegetarian option)

Christmas Breakfast Casserole is the perfect savory breakfast to serve a crowd. This colorful make ahead breakfast casserole features eggs, breakfast sausage, peppers, onions, cheese and bread. This Christmas Casserole makes a delicious savory recipe to serve on a holiday morning. Makes 10 servings.

Love make-ahead dishes for holiday breakfast? Check out Cranberry Overnight French Toast and Walnut Sticky Buns with Cream Cheese Icing.

Christmas Breakfast Casserole has been a tradition in my family ever since I can remember. It’s total comfort food.

My family always hosted friends and family on Christmas Eve. We always spent Christmas Day with friends and family once the festivities were over at our house.

On Christmas Eve, once dishes are clean and our guests have gone home, my mom pulls together our Christmas Breakfast Casserole for the next morning. Some years, it features bacon; others, leftover ham.

Whatever ingredients she throws into the baking dish, it turns out beautifully. More than anything, her Christmas casserole recipes taste like home.

Why I love this recipe:

When I plotted out this week’s recipes, I wanted to include a savory dish, as well as something that reminded me of home since we aren’t traveling for Christmas this year.

My casserole is a bit different than my mom’s.

Let’s be honest: Trying to recreate your mom’s traditional Christmas morning recipe is basically impossible. For whatever reason, it will always taste better when she makes it because it reminds you of your childhood and Christmas past.

That said, this casserole is super tasty, and it adds some festive colors to your Christmas breakfast table.

And the best part? You can make it the night before, let it hang out in the fridge overnight, then pop it in the oven 45 minutes before you’ll be ready to eat on Christmas Day.

More dishes to serve on a holiday morning: Baked Maple Bacon Donuts | How to Bake Bacon | Eggnog Pancakes with Cinnamon Syrup | Blended Mimosas (or Strawberry Champagne Cocktail) | Egg Casserole with Green Chiles

Need more breakfast and brunch inspiration? Head on over to my Breakfast Recipe Index for more ideas.

What do I need to make this recipe?

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• Sheet pan
• A nonstick skillet
• Glass bowls
• Whisk
• Glass measuring cup
• Casserole dish

Here’s what you’ll need:

• Baguette—it needs to be stale (or close to it), as well as cut or torn into bite-sized pieces
• Breakfast sausage—you can use your favorite brand and favorite meat in this recipe! Just make sure it’s fresh so you can easily take it out of the casing.
• Bell peppers—we need a red and green bell pepper to make this a true Christmas casserole.
• Onion—use a yellow or white onion here
• Garlic cloves—you’re going to need a lot of these. Go ahead and get a whole head of garlic and mince them all because they’ll add such glorious flavor.
• Eggs—you need a lot, so don’t skimp on these or try to find a substitute. There isn’t one.
• Milk—we only keep whole milk in our house, so that’s what we used here. I know for a fact, though, that my mother only keeps skim or 2% milk and uses that to make this recipe, and it works just fine for her.
• Salt-Free Creole Seasoning—or your favorite Cajun or Creole seasoning that has salt. Just omit the additional salt if you’re using a variety that does have salt because these seasoning blends can get quite salty.
• Kosher salt—I use a medium-grain kosher salt, but you could use the same amount of a similarly sized sea sat, too.
• Colby Jack cheese—or another favorite cheese! Cheddar and pepperjack would be excellent in this recipe.

How to make Christmas Breakfast Casserole

Preheat the oven to 350°F.

Place the cubed bread on a baking sheet, and bake for 10-15 minutes, or until toasted.

Remove from the oven and set aside.

We do this so that the bread can really soak up the egg mixture without losing its texture.

As the bread toasts, brown the breakfast sausage in a large skillet over medium-high heat. Break it up using a fork or a wooden spoon.

When the sausage is very brown, add the bell peppers, onion and garlic. Cook the vegetables until soft.

In a large bowl, whisk together the eggs and milk. Season with the Creole seasoning and salt. Set aside.

Arrange the casserole in a large casserole dish.

• Sprinkle in some of the cooked sausage mixture.
• Top with half of the bread.
• Add more of the sausage mixture on top of it.
• Top that with cheese.
• Pour half of the egg mixture on top of these ingredients.
• Add the rest of the bread, sausage mixture and cheese, then top with the last half of the eggs.

Cover with plastic wrap, and refrigerate overnight.

Bake the Casserole the Day Of

Preheat the oven to 350°F.

Place the baking dish in the preheated oven straight from the refrigerator.

Bake uncovered for 45-60 minutes, or until the top of the casserole has puffed up and browned.

Serve warm, and enjoy!

Frequently Asked Questions

Other holiday breakfast ideas:

• Cranberry Overnight French Toast
• Tater Tot Breakfast Casserole
• Cranberry Cinnamon Rolls
• Pumpkin Overnight French Toast Casserole

Interested in this colorful Christmas (or any-other-time-of-year) brunch fare?

Here’s how I did it…