Homemade sausage breakfast casserole is a comforting, oven-baked breakfast made with savory breakfast sausage, fluffy eggs, bread, and melted cheddar cheese. Everything is combined in one baking dish and cooked until the eggs are set, the cheese is golden, and the edges develop delicious browned spots.
Each serving has a soft, tender interior with plenty of sausage and cheesy flavor. It’s the kind of hearty breakfast that works just as well for a weekend brunch as it does for a holiday morning or a family gathering.
One of the best things about this recipe is that you can prepare it the night before and bake it the next morning. With simple ingredients and minimal preparation, this homemade sausage breakfast casserole is an easy way to feed several people.
Why You’ll Love This Recipe
- Easy to prepare: Simple ingredients and straightforward steps.
- Hearty and filling: Sausage, eggs, bread, and cheese make a satisfying meal.
- Make-ahead friendly: Assemble it the night before and bake in the morning.
- Perfect for sharing: Makes enough for a family breakfast or brunch.
- Cheesy and flavorful: Melted cheddar creates a delicious golden topping.
- Customizable: Add vegetables, different cheeses, or your favorite seasonings.
Preparation and Cooking Time
- Preparation time: 20 minutes
- Cooking time: 40–50 minutes
- Resting time: 10 minutes
- Total time: Approximately 1 hour 20 minutes
- Servings: 8
- Cooking method: Oven-baked
Ingredients
- 1 pound (450 g) ground breakfast sausage
- 8 large eggs
- 2 cups (480 ml) whole milk
- 6 cups cubed day-old bread, approximately 6–7 slices
- 2 cups (200 g) shredded cheddar cheese
- ½ medium yellow onion, finely chopped
- ½ teaspoon garlic powder
- ½ teaspoon dried mustard powder, optional
- ½ teaspoon salt, or to taste
- ½ teaspoon black pepper
- 1 tablespoon butter, for greasing the baking dish
- ½ teaspoon paprika, optional
For Garnishing
- A little extra shredded cheddar
- Chopped fresh parsley or green onions
- Freshly ground black pepper
Ingredient tip: Day-old bread works particularly well because it absorbs the egg mixture without becoming too mushy. Ordinary sandwich bread, French bread, or country-style bread can all be used.
How to Make Sausage Breakfast Casserole
Step 1: Prepare the baking dish
Preheat your oven to 350°F (175°C).
Lightly grease a 9 × 13-inch baking dish with butter.
Spread the cubed bread evenly across the bottom of the dish.
Set aside while you prepare the sausage and egg mixture.
Step 2: Brown the breakfast sausage
Place a large skillet over medium heat.
Add the ground breakfast sausage.
Use a wooden spoon or spatula to break it into small pieces as it cooks.
Cook for approximately 7–9 minutes, stirring occasionally, until the sausage is browned and completely cooked.
If there is excessive grease, carefully drain it from the skillet.
Transfer the cooked sausage to a plate and allow it to cool slightly.
Step 3: Cook the onion
Using the same skillet, add the chopped onion.
Cook for approximately 3–4 minutes until softened.
If the pan is dry, add a small amount of butter or olive oil.
Remove from the heat and set aside.
Step 4: Prepare the egg mixture
Crack the eggs into a large mixing bowl.
Pour in the milk.
Add the garlic powder, dried mustard, salt, black pepper, and paprika if using.
Whisk until the eggs and milk are fully combined.
The mixture should look smooth and evenly blended.
Step 5: Assemble the casserole
Spread the cooked sausage evenly over the bread cubes.
Add the softened onions.
Sprinkle approximately 1½ cups of shredded cheddar cheese over the top.
Pour the egg mixture slowly over the entire dish.
Use the back of a spoon to gently press the bread into the liquid so that it absorbs the mixture.
Finish with the remaining cheddar cheese.
Step 6: Let the bread absorb the mixture
Allow the assembled casserole to rest for approximately 10–15 minutes before baking.
This gives the bread time to absorb the egg mixture and helps create a soft, evenly cooked interior.
For a more convenient make-ahead option, cover the dish and refrigerate it overnight instead.
Step 7: Bake the casserole
Place the baking dish in the preheated oven.
Bake uncovered for approximately 40–50 minutes.
The top should become golden brown, the cheese should melt, and the center should be fully set.
If the top browns too quickly, loosely cover the dish with aluminum foil during the remaining cooking time.
Step 8: Check that it’s cooked
Insert a knife into the center of the casserole.
It should come out without visible liquid egg mixture.
For a reliable food-safety check, the center should reach 160°F (71°C).
If the center is still wet, return the dish to the oven for another 5–10 minutes and check again.
Step 9: Let it rest
Remove the casserole from the oven.
Allow it to rest for approximately 10 minutes before cutting.
This helps the egg mixture settle and makes serving easier.
Step 10: Serve warm
Cut the casserole into portions using a sharp knife or spatula.
Serve on everyday breakfast plates with freshly ground black pepper and chopped parsley or green onions.
Enjoy while the cheese is still warm and melted.
Tips for the Best Sausage Breakfast Casserole
Use day-old bread
Slightly dry bread absorbs the egg mixture more evenly and helps prevent a soggy casserole.
Brown the sausage properly
Allow the sausage to develop some golden-brown spots. This adds a deeper savory flavor to the finished dish.
Drain excess grease
Too much sausage grease can make the casserole oily. Drain excess fat before assembling.
Don’t skip the resting time
Allowing the bread to absorb the egg mixture helps create a more consistent texture throughout the dish.
Shred your own cheese
Freshly grated cheddar melts smoothly and creates a delicious cheesy topping.
Check the center before removing it
The edges may look fully cooked while the center still needs more time. Check the middle rather than relying only on the color of the top.
Let it rest before cutting
A short resting period helps the casserole hold together when served.
Delicious Sausage Breakfast Casserole Variations
Sausage and Hash Brown Breakfast Casserole
Replace the bread cubes with approximately 4 cups of thawed shredded hash browns.
Spread them across the bottom of the greased baking dish, add the cooked sausage, vegetables, cheese, and egg mixture, then bake as directed.
The result is a hearty potato-based breakfast casserole.
Sausage, Egg, and Biscuit Casserole
Replace the bread with approximately 6 refrigerated biscuits cut into small pieces.
Arrange them in the baking dish and add the cooked sausage, egg mixture, and cheese.
Bake until the biscuits are cooked through and the eggs are set.
Sausage and Spinach Breakfast Casserole
Add 1–2 cups of fresh spinach to the skillet after cooking the onion.
Stir until wilted, then combine with the sausage.
This adds color and a little extra vegetable flavor.
Sausage and Mushroom Casserole
Add 1 cup sliced mushrooms to the skillet.
Cook until softened and lightly browned before assembling the casserole.
Mushrooms pair particularly well with sausage and cheddar.
Extra Cheesy Sausage Casserole
Use 2½ cups of shredded cheddar and add ½ cup Monterey Jack or mozzarella.
The combination creates a richer, more melted cheese topping.
Spicy Sausage Breakfast Casserole
Use spicy breakfast sausage or add ¼ teaspoon cayenne pepper and a pinch of red pepper flakes to the egg mixture.
Sausage and Bell Pepper Casserole
Add ½ cup diced red or green bell peppers.
Cook them with the onion until slightly softened before adding them to the baking dish.
Bacon and Sausage Breakfast Casserole
Add 4–5 strips of cooked, crumbled bacon along with the sausage.
This creates an especially hearty breakfast with two savory meat flavors.
Vegetarian Breakfast Casserole
Replace the sausage with sautéed mushrooms, spinach, bell peppers, and onions.
Add a little smoked paprika for extra savory flavor.
What to Serve with Sausage Breakfast Casserole
This casserole is filling on its own, but it pairs beautifully with simple breakfast sides.
- Fresh fruit: Strawberries, melon, oranges, or berries add freshness.
- Buttermilk biscuits: Soft biscuits make a comforting addition.
- Hash browns: A crispy potato side for a hearty breakfast.
- Fresh tomatoes: Add a light, refreshing contrast.
- Avocado slices: Provide a creamy texture.
- Pancakes: A sweet breakfast option alongside the savory casserole.
- Green salad: A simple side for brunch.
- Coffee or tea: Perfect with a warm breakfast.
For a family breakfast, serve the casserole with fresh fruit, buttered toast, and a cup of coffee.
Make-Ahead Instructions
One of the biggest advantages of this recipe is that it can be assembled ahead of time.
Prepare the sausage: Brown the sausage, drain excess grease, and allow it to cool.
Prepare the vegetables: Cook the onion and any additional vegetables.
Assemble the casserole: Layer the bread, sausage, vegetables, cheese, and egg mixture in the baking dish.
Cover and refrigerate: Cover tightly and refrigerate overnight, ideally for no more than 24 hours.
Bake the next morning: Remove the dish from the refrigerator while the oven preheats. Bake until the center is fully set and reaches 160°F (71°C). A cold casserole may need approximately 5–15 additional minutes.
If using a glass baking dish, avoid transferring it directly from a very cold refrigerator into a hot oven unless the manufacturer’s instructions specifically allow it. Let it lose some of its chill first.
Storage and Reheating
Refrigerator: Allow leftover casserole to cool slightly, then transfer portions to an airtight container. Refrigerate at 40°F (4°C) or below for 3–4 days.
Freezer: Cut the fully cooled casserole into individual portions. Wrap each portion tightly and place in a freezer-safe container. Freeze for up to 2 months for best quality.
Thawing: Thaw frozen portions overnight in the refrigerator.
Oven reheating: Place a portion in an oven-safe dish, cover loosely with foil, and heat at 325°F (165°C) until warmed through.
Microwave reheating: Place an individual serving on a microwave-safe plate and heat in 30-second intervals until hot.
Food safety: Reheat leftovers to 165°F (74°C). Refrigerate cooked casserole within 2 hours of serving.
Frequently Asked Questions
Can I make sausage breakfast casserole the night before?
Yes. Assemble the casserole, cover it tightly, and refrigerate overnight. Bake it the next morning until the center is fully set.
Can I use regular sandwich bread?
Absolutely. White bread, whole wheat bread, French bread, and sourdough all work well. Slightly stale bread is especially useful.
Why is my breakfast casserole soggy?
Too much liquid, very fresh bread, or insufficient baking time can cause a soggy texture. Use day-old bread, measure the milk carefully, and check that the center is fully set.
Can I use a different type of sausage?
Yes. Pork breakfast sausage is traditional, but turkey sausage, chicken sausage, or spicy sausage can also be used.
Can I use bacon instead of sausage?
Yes. Replace the sausage with approximately 8 slices of cooked, crumbled bacon.
How do I know when the casserole is done?
The center should be set rather than liquid. A food thermometer inserted into the center should read 160°F (71°C).
Can I freeze sausage breakfast casserole?
Yes. Bake it first, allow it to cool completely, cut into portions, and freeze in airtight packaging.
Can I make this casserole without bread?
Yes. Replace the bread with thawed hash browns or cooked diced potatoes. Adjust the baking time as needed.
What cheese works best?
Cheddar is a classic choice. Monterey Jack, mozzarella, Colby, and a cheddar blend also work well.
Can I add vegetables?
Yes. Bell peppers, spinach, mushrooms, onions, and tomatoes are all good additions. Cook watery vegetables before adding them to the casserole.
Why is the top brown but the middle still soft?
The oven may be too hot, or the casserole may be too deep. Cover the top loosely with foil and continue baking until the center reaches 160°F (71°C).
Final Thoughts
Homemade sausage breakfast casserole is a delicious, filling meal that combines savory sausage, fluffy baked eggs, bread, and melted cheddar cheese in one easy dish.
The best results come from browning the sausage first, using slightly dry bread, allowing the egg mixture to soak in, and baking until the center is fully set.
Prepare it the night before for an easier morning, or make it fresh for a relaxed weekend breakfast.
Serve warm with fresh fruit, toast, or a cup of coffee for a comforting homemade meal.
Save this easy sausage breakfast casserole recipe for your next family breakfast or weekend brunch!
