Start your Christmas morning with a warm and hearty breakfast sausage casserole. This dish combines savory breakfast sausage, fluffy eggs, and gooey cheddar cheese to create a comforting meal that will keep you satisfied throughout the festivities. It's easy to prepare and perfect for feeding a crowd.
Most of the ingredients for this recipe are common pantry staples, but you might need to pick up breakfast sausage and dry mustard if you don't already have them. Breakfast sausage can usually be found in the refrigerated section near the bacon and other breakfast meats. Dry mustard is typically located in the spice aisle.
Ingredients For Christmas Breakfast Sausage Casserole
Breakfast sausage: A flavorful ground meat that adds a savory element to the casserole.
Eggs: These provide structure and richness to the dish.
Milk: Helps to create a creamy texture and blend the ingredients together.
Salt: Enhances the overall flavor of the casserole.
Dry mustard: Adds a subtle tangy flavor that complements the sausage.
Bread: Cubed slices absorb the egg mixture and add bulk to the casserole.
Cheddar cheese: Melts into the casserole, adding a gooey, cheesy layer.
Technique Tip for This Recipe
When browning the sausage, make sure to break it up into small, even pieces to ensure it cooks thoroughly and evenly. This will also help distribute the flavor more uniformly throughout the casserole. Additionally, let the bread cubes sit out for a few hours or toast them lightly before adding to the mixture; this will help them absorb the egg mixture better and prevent the casserole from becoming too soggy.
Suggested Side Dishes
Alternative Ingredients
breakfast sausage - Substitute with ground turkey: Ground turkey is a leaner option and can be seasoned to mimic the flavors of breakfast sausage.
breakfast sausage - Substitute with vegetarian sausage: For a vegetarian option, use plant-based sausage which provides a similar texture and flavor.
eggs - Substitute with flaxseed meal: Mix 1 tablespoon of flaxseed meal with 3 tablespoons of water per egg. This works as a binding agent in the casserole.
eggs - Substitute with silken tofu: Blend ¼ cup of silken tofu per egg until smooth. This provides a similar texture and protein content.
milk - Substitute with almond milk: Almond milk is a dairy-free alternative that works well in casseroles.
milk - Substitute with oat milk: Oat milk has a creamy texture that can mimic the consistency of regular milk.
salt - Substitute with soy sauce: Soy sauce adds a salty flavor along with umami, enhancing the overall taste.
salt - Substitute with sea salt: Sea salt can be used as a direct replacement and may offer a slightly different mineral profile.
dry mustard - Substitute with yellow mustard: Use 1 teaspoon of yellow mustard for every ½ teaspoon of dry mustard. It adds a similar tangy flavor.
dry mustard - Substitute with horseradish: Use sparingly as horseradish is more potent. It adds a similar spicy kick.
bread - Substitute with gluten-free bread: For a gluten-free option, use gluten-free bread which provides a similar texture.
bread - Substitute with potatoes: Diced and pre-cooked potatoes can be used for a hearty, gluten-free alternative.
shredded cheddar cheese - Substitute with mozzarella cheese: Mozzarella provides a milder flavor and melts well.
shredded cheddar cheese - Substitute with nutritional yeast: For a dairy-free option, nutritional yeast adds a cheesy flavor and is rich in B vitamins.
Other Alternative Recipes Similar to This Casserole
How to Store or Freeze This Casserole
- Allow the casserole to cool completely after baking. This ensures that condensation doesn't form inside the storage container, which could make the bread cubes soggy.
- Transfer the cooled casserole to an airtight container or cover the baking dish tightly with aluminum foil or plastic wrap. This helps maintain the freshness and prevents the sausage and cheese from drying out.
- Store the casserole in the refrigerator for up to 3-4 days. This is the optimal time frame to enjoy the dish while it's still flavorful and safe to eat.
- For longer storage, consider freezing the casserole. Cut it into individual portions for easier reheating. Wrap each portion tightly in plastic wrap and then place them in a freezer-safe bag or container. This double layer of protection helps prevent freezer burn.
- Label the container with the date and contents. This helps you keep track of how long the casserole has been stored and ensures you use it within a reasonable time frame.
- When ready to enjoy, thaw the frozen casserole portions in the refrigerator overnight. This gradual thawing process helps maintain the texture and flavor of the dish.
- Reheat the casserole in the oven at 350°F (175°C) for about 20-25 minutes, or until heated through. Cover with foil to prevent the cheese from over-browning. Alternatively, you can reheat individual portions in the microwave, but be sure to cover them to retain moisture.
- If the casserole seems a bit dry after reheating, consider adding a splash of milk or a sprinkle of extra cheese before reheating to restore some of the original creaminess and flavor.
How to Reheat Leftovers
Preheat your oven to 350°F (175°C). Place the leftover Christmas Breakfast Sausage Casserole in an oven-safe dish. Cover it with aluminum foil to prevent it from drying out. Bake for about 20-25 minutes, or until heated through.
For a quicker option, use the microwave. Place a portion of the casserole on a microwave-safe plate. Cover it with a microwave-safe lid or another plate to retain moisture. Heat on medium power for 2-3 minutes, checking halfway through to ensure it heats evenly.
If you prefer a crispy top, use a toaster oven. Preheat the toaster oven to 350°F (175°C). Place the casserole on a toaster oven tray and cover it loosely with foil. Heat for 15-20 minutes, removing the foil for the last 5 minutes to crisp up the top.
For an even more indulgent reheating method, try a skillet. Heat a non-stick skillet over medium heat and add a small amount of butter or olive oil. Place a portion of the casserole in the skillet and cook for 5-7 minutes, flipping halfway through to ensure both sides are heated and slightly crispy.
Best Tools for This Recipe
Oven: Used to bake the casserole at 350°F (175°C) until it is set.
Skillet: Used to cook the sausage over medium heat until it is evenly browned.
Mixing bowl: Used to beat the eggs and mix them with milk, salt, dry mustard, bread cubes, cheese, and cooked sausage.
Whisk: Used to beat the eggs and combine them with the other liquid ingredients.
Measuring cups: Used to measure out the milk and shredded cheddar cheese accurately.
Measuring spoons: Used to measure out the salt and dry mustard.
Cutting board: Used to cube the bread slices.
Knife: Used to cut the bread into cubes.
Baking dish: Used to hold the mixed ingredients and bake the casserole in the oven.
Spatula: Used to stir the sausage while it cooks and to mix the ingredients in the mixing bowl.
Grease or cooking spray: Used to grease the baking dish to prevent the casserole from sticking.
How to Save Time on Making This Casserole
Cook sausage in advance: Prepare and cook the sausage the night before. Store it in the refrigerator to save time in the morning.
Use pre-shredded cheese: Opt for pre-shredded cheddar cheese to cut down on prep time.
Pre-cube the bread: Cube the bread the night before and store it in an airtight container.
Mix ingredients ahead: Combine the eggs, milk, salt, and dry mustard the night before. Store the mixture in the refrigerator.
Grease the baking dish: Grease the baking dish ahead of time to streamline the assembly process.

Christmas Breakfast Sausage Casserole
Ingredients
Main Ingredients
- 1 lb breakfast sausage
- 6 eggs
- 2 cups milk
- 1 teaspoon salt
- 1 teaspoon dry mustard
- 6 slices bread, cubed
- 2 cups shredded cheddar cheese
Instructions
- Preheat oven to 350°F (175°C).
- In a skillet, cook the sausage over medium heat until evenly browned. Drain and set aside.
- In a mixing bowl, beat the eggs. Add the milk, salt, and dry mustard. Stir in the bread cubes, cheese, and cooked sausage. Pour into a greased baking dish.
- Bake in preheated oven for 45 minutes, or until set.
Nutritional Value
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