This delightful Christmas breakfast sausage casserole is the perfect way to start your holiday morning. Combining savory breakfast sausage, fluffy eggs, and gooey cheddar cheese, this dish is both hearty and comforting. The addition of bread cubes gives it a wonderful texture, making it a crowd-pleaser for the whole family.
While most of the ingredients for this recipe are common pantry staples, you might need to pick up dry mustard if you don't already have it. This spice adds a subtle tangy flavor that enhances the overall taste of the casserole. Make sure to also get breakfast sausage and shredded cheddar cheese if they are not already in your fridge.

Ingredients for Christmas Breakfast Sausage Casserole
Breakfast sausage: Adds a savory and meaty flavor to the casserole.
Eggs: Provides structure and richness to the dish.
Milk: Helps to create a creamy texture.
Salt: Enhances the overall flavor.
Dry mustard: Adds a subtle tangy flavor.
Bread cubes: Gives the casserole a wonderful texture.
Shredded cheddar cheese: Adds a gooey, cheesy element.
Technique Tip for This Recipe
To ensure your casserole has a perfect texture, let the bread cubes soak in the egg mixture for about 10 minutes before adding the sausage and cheese. This allows the bread to fully absorb the flavors and prevents it from becoming too dry during baking.
Suggested Side Dishes
Alternative Ingredients
cooked and crumbled breakfast sausage - Substitute with ground turkey: Ground turkey is a leaner option and can be seasoned to mimic the flavors of breakfast sausage.
cooked and crumbled breakfast sausage - Substitute with vegetarian sausage: Vegetarian sausage provides a plant-based alternative while maintaining a similar texture and flavor.
beaten eggs - Substitute with egg substitute: Egg substitutes like liquid egg replacers or silken tofu can be used for a lower cholesterol option or for those with egg allergies.
milk - Substitute with almond milk: Almond milk is a dairy-free alternative that works well in casseroles, providing a similar consistency.
milk - Substitute with oat milk: Oat milk is another dairy-free option that adds a slightly sweet flavor and creamy texture.
salt - Substitute with soy sauce: Soy sauce can add a savory depth of flavor while also providing the necessary saltiness.
dry mustard - Substitute with Dijon mustard: Dijon mustard can be used in place of dry mustard, offering a similar tangy flavor.
cubed bread - Substitute with gluten-free bread: Gluten-free bread is a suitable alternative for those with gluten sensitivities or celiac disease.
cubed bread - Substitute with potato cubes: Potato cubes can add a hearty texture and are a good option for those avoiding grains.
shredded cheddar cheese - Substitute with shredded mozzarella cheese: Mozzarella cheese provides a milder flavor and melts well in casseroles.
shredded cheddar cheese - Substitute with nutritional yeast: Nutritional yeast offers a cheesy flavor and is a great vegan alternative.
Other Alternative Recipes Similar to This Dish
How to Store / Freeze This Recipe
Allow the Christmas Breakfast Sausage Casserole to cool completely after baking. This ensures that condensation doesn't form inside the storage container, which could make the casserole soggy.
For short-term storage, transfer the casserole to an airtight container or cover the baking dish tightly with plastic wrap or aluminum foil. Store in the refrigerator for up to 3-4 days.
If you plan to freeze the casserole, cut it into individual portions. This makes reheating more convenient and reduces waste.
Wrap each portion tightly in plastic wrap, then place them in a resealable freezer bag or an airtight container. Label with the date to keep track of freshness.
When you're ready to enjoy a frozen portion, thaw it in the refrigerator overnight. This gradual thawing helps maintain the texture and flavor of the casserole.
Reheat the thawed casserole in a preheated oven at 350°F (175°C) for about 20-25 minutes, or until heated through. Cover with aluminum foil to prevent the top from over-browning.
For a quicker option, you can reheat individual portions in the microwave. Place a portion on a microwave-safe plate, cover with a microwave-safe lid or another plate, and heat on medium power for 2-3 minutes, or until hot.
To keep the cheese topping melty and delicious, you can add a sprinkle of fresh shredded cheddar cheese during the last few minutes of reheating.
If you notice any excess moisture after reheating, simply blot it with a paper towel to maintain the casserole's texture.
Enjoy your Christmas Breakfast Sausage Casserole with a side of fresh fruit or a warm cup of coffee for a delightful holiday breakfast.
How to Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Place the leftover Christmas Breakfast Sausage Casserole in an oven-safe dish.
- Cover the dish with aluminum foil to prevent the cheese from drying out.
- Heat for about 20-25 minutes, or until the casserole is warmed through. If you prefer a crispy top, remove the foil for the last 5 minutes of heating.
Microwave Method:
- Place a portion of the casserole on a microwave-safe plate.
- Cover with a microwave-safe lid or another plate to retain moisture.
- Heat on medium power for 2-3 minutes, checking halfway through to ensure even heating. If needed, continue to heat in 30-second increments until hot.
Stovetop Method:
- Heat a non-stick skillet over medium heat.
- Add a small amount of butter or olive oil to the skillet.
- Place the leftover casserole in the skillet and cover with a lid.
- Heat for about 5-7 minutes, flipping occasionally to ensure even warming. This method can help achieve a slightly crispy bottom layer.
Air Fryer Method:
- Preheat your air fryer to 350°F (175°C).
- Place the leftover casserole in the air fryer basket, ensuring it's in a single layer.
- Heat for 5-7 minutes, checking halfway through. This method will give a nice crispy texture to the bread cubes and cheese.
Best Tools for This Recipe
Oven: Used to bake the casserole at 350°F (175°C) for 45 minutes until set.
Large mixing bowl: Used to combine the eggs, milk, salt, dry mustard, bread cubes, sausage, and cheese.
Whisk: Used to beat the eggs and mix them with the milk, salt, and dry mustard.
Measuring cups: Used to measure out 2 cups of milk and 2 cups of shredded cheddar cheese.
Measuring spoons: Used to measure 1 teaspoon of salt and 1 teaspoon of dry mustard.
Knife: Used to cube the bread slices.
Cutting board: Used as a surface to cube the bread slices.
9x13 inch baking dish: Used to pour the mixture into and bake the casserole.
Cooking spray: Used to grease the baking dish to prevent the casserole from sticking.
Spatula: Used to stir the ingredients together in the mixing bowl and to spread the mixture evenly in the baking dish.
How to Save Time on Making This Recipe
Prepare ingredients ahead: Cook and crumble the sausage the night before. Cube the bread and shred the cheese in advance.
Use pre-shredded cheese: Save time by using pre-shredded cheddar cheese instead of shredding it yourself.
Mix and refrigerate: Combine the eggs, milk, salt, and dry mustard the night before. Store in the fridge and just add the bread, sausage, and cheese in the morning.
Line the baking dish: Use parchment paper to line the baking dish for easy cleanup.

Christmas Breakfast Sausage Casserole
Ingredients
Main Ingredients
- 1 pound breakfast sausage cooked and crumbled
- 6 eggs beaten
- 2 cups milk
- 1 teaspoon salt
- 1 teaspoon dry mustard
- 6 slices bread cubed
- 2 cups cheddar cheese shredded
Instructions
- Preheat oven to 350°F (175°C).
- In a large mixing bowl, combine eggs, milk, salt, and dry mustard. Stir in bread cubes, sausage, and cheese.
- Pour mixture into a greased 9x13 inch baking dish.
- Bake in preheated oven for 45 minutes, or until set.
Nutritional Value
Keywords
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