This delightful Christmas breakfast sausage casserole is the perfect way to start your holiday morning. Combining savory sausage, fluffy eggs, and gooey cheddar cheese, this dish is both hearty and comforting. Prepare it the night before for a stress-free breakfast that will impress your family and guests.
Most of the ingredients in this recipe are common household items, but you may need to pick up dry mustard if you don't already have it in your spice cabinet. This ingredient adds a subtle tangy flavor that enhances the overall taste of the casserole. Additionally, make sure you have enough cheddar cheese and breakfast sausage on hand, as these are key components of the dish.

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 in the casserole.
Salt: Enhances the overall flavor of the ingredients.
Dry mustard: Adds a subtle tangy flavor that complements the sausage.
Bread: Acts as a base and absorbs the egg mixture, creating a fluffy texture.
Cheddar cheese: Melts into the casserole, adding a gooey and cheesy element.
Technique Tip for This Breakfast Casserole
To ensure your casserole has a perfect texture, make sure to thoroughly drain the sausage after cooking. Excess grease can make the dish too oily. Additionally, when cubing the bread, use slightly stale bread if possible. It will absorb the egg mixture better, resulting in a more cohesive and flavorful casserole.
Suggested Side Dishes
Alternative Ingredients
breakfast sausage - Substitute with turkey sausage: Turkey sausage is a leaner option and provides a similar flavor profile.
breakfast sausage - Substitute with vegetarian sausage: For a vegetarian option, use plant-based sausage to maintain the texture and flavor.
eggs - Substitute with egg substitute: Egg substitutes are great for those with dietary restrictions and can mimic the binding properties of eggs.
eggs - Substitute with flaxseed meal and water mixture: Mix 1 tablespoon of flaxseed meal with 3 tablespoons of water per egg for a vegan alternative.
milk - Substitute with almond milk: Almond milk is a dairy-free option that works well in casseroles.
milk - Substitute with oat milk: Oat milk provides a creamy texture similar to cow's milk and is suitable for those who are lactose intolerant.
salt - Substitute with soy sauce: Soy sauce can add a salty and umami flavor, but use it sparingly to avoid overpowering the dish.
salt - Substitute with sea salt: Sea salt can be used as a direct replacement and may offer a slightly different mineral taste.
dry mustard - Substitute with Dijon mustard: Dijon mustard can provide a similar tangy flavor, though it is in paste form.
dry mustard - Substitute with yellow mustard: Yellow mustard can be used in a pinch, though it has a slightly different flavor profile.
bread - Substitute with gluten-free bread: For those with gluten intolerance, gluten-free bread works well in casseroles.
bread - Substitute with sourdough bread: Sourdough bread can add a unique tangy flavor and hearty texture.
cheddar cheese - Substitute with mozzarella cheese: Mozzarella cheese melts well and provides a milder flavor.
cheddar cheese - Substitute with vegan cheese: For a dairy-free option, use vegan cheese that melts well and mimics the texture of cheddar.
Other Alternative Recipes Similar to This Breakfast Casserole
How to Store or Freeze This Breakfast Casserole
- Allow the casserole to cool completely before storing. This prevents condensation, which can make the dish soggy.
- For short-term storage, cover the baking dish tightly with plastic wrap or aluminum foil and place it in the refrigerator. It will stay fresh for up to 3 days.
- If you plan to freeze the casserole, transfer it to an airtight container or wrap it securely with plastic wrap followed by a layer of aluminum foil. This double layer helps prevent freezer burn.
- Label the container with the date and contents to keep track of its freshness.
- When ready to enjoy, thaw the casserole in the refrigerator overnight. This ensures even thawing and maintains the texture.
- Reheat the casserole in a preheated oven at 350°F (175°C) for about 20-30 minutes or until heated through. Cover with aluminum foil if the top starts to brown too quickly.
- For individual servings, you can microwave on medium power for 2-3 minutes, checking and stirring halfway through to ensure even heating.
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 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 a damp paper towel to retain moisture. Heat on medium power for 2-3 minutes, checking and stirring halfway through to ensure even heating.
If you prefer a crispy top, use the broiler. First, reheat the casserole in the microwave for 1-2 minutes. Then, transfer it to an oven-safe dish and place it under the broiler for 2-3 minutes until the top is golden and bubbly.
For an alternative method, use a skillet. Cut the casserole into slices and place them in a non-stick skillet over medium heat. Cover with a lid and cook for 5-7 minutes, flipping halfway through, until heated thoroughly.
If you have an air fryer, preheat it to 350°F (175°C). Place the casserole slices in the basket, making sure they don't overlap. Air fry for 5-7 minutes, checking halfway through to ensure even heating.
Best Tools for Making This Breakfast Casserole
Oven: Used to bake the casserole at a consistent temperature of 350°F (175°C).
Skillet: Essential for cooking the sausage until it is browned.
Mixing bowl: Needed to beat the eggs and mix them with milk, salt, and dry mustard.
Whisk: Useful for thoroughly mixing the egg mixture.
Baking dish: The container where you will assemble and bake the casserole.
Measuring cups: Necessary for accurately measuring the milk and other ingredients.
Measuring spoons: Used to measure the salt and dry mustard precisely.
Knife: Required for cubing the bread slices.
Cutting board: Provides a safe surface for cutting the bread.
Cheese grater: Needed if you are shredding the cheddar cheese yourself.
Spatula: Useful for stirring and transferring the cooked sausage.
Aluminum foil: Used to cover the baking dish when refrigerating the casserole overnight.
Cooling rack: Allows the casserole to cool and set for 10 minutes before serving.
How to Save Time on Making This Breakfast Casserole
Cook sausage ahead: Brown the sausage the night before and store it in the fridge to save time in the morning.
Pre-cut bread: Cube the bread in advance and keep it in an airtight container.
Shred cheese early: Shred the cheddar cheese ahead of time and refrigerate it.
Mix egg mixture: Prepare the egg mixture the night before and store it in the fridge.
Assemble casserole: Assemble the casserole the night before and simply bake it in the morning.
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 Cheddar cheese, shredded
Instructions
- Preheat oven to 350°F (175°C).
- In a skillet, cook sausage over medium heat until browned. Drain and set aside.
- In a mixing bowl, beat the eggs. Add milk, salt, and dry mustard. Mix well.
- Place bread cubes in a greased baking dish. Sprinkle with cooked sausage and cheese.
- Pour egg mixture over the bread, sausage, and cheese. Cover and refrigerate overnight.
- Bake in preheated oven for 45 minutes or until set. Let stand for 10 minutes before serving.
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