If you are looking for a comforting dish that will become your new breakfast favorite, this Hard-Boiled Egg and Sausage Breakfast Casserole Recipe is exactly what you need. It brings together the hearty flavors of creamy hard-boiled eggs, savory sausage, and melted Cheddar cheese, all baked into one golden, bubbly casserole. This dish is not only satisfying but also incredibly versatile, perfect for family mornings, brunch gatherings, or a make-ahead meal solution that feels special every time.

Ingredients You’ll Need
These ingredients are straightforward yet each plays a vital role in building the casserole’s rich flavor and delightful texture. From the protein-packed hard-boiled eggs to the flavorful seasoning mix, everything works harmoniously to create a satisfying breakfast centerpiece.
- 8 hard-boiled eggs, peeled and sliced: The star ingredient that adds creamy texture and protein.
- 1/2 pound breakfast sausage, cooked and crumbled: Brings savory, smoky depth and a bit of spice.
- 1 cup shredded Cheddar cheese: Melts perfectly to create that irresistible golden crust and cheesy richness.
- 1/2 cup milk: Adds moisture for a smooth, custardy bake.
- 1/2 cup heavy cream: Elevates the creaminess for a luxurious texture.
- 1 teaspoon mustard powder: Adds a subtle tang that brightens the flavor.
- 1/2 teaspoon salt: Enhances all the savory notes.
- 1/2 teaspoon black pepper: Provides a gentle kick of spice.
- 1/4 teaspoon garlic powder: Layers in earthy aroma and flavor.
- 1/4 teaspoon onion powder: Complements the sausage and cheese with a sweet, mellow edge.
- 2 tablespoons butter: Used for greasing and dotting the casserole to encourage browning and richness.
How to Make Hard-Boiled Egg and Sausage Breakfast Casserole Recipe
Step 1: Prepare the baking dish and sausage
Start by preheating your oven to 350°F (175°C). Generously grease a 9×13-inch baking dish with butter to prevent sticking and add flavor. Next, cook your breakfast sausage in a skillet, crumbling it as it browns, then drain any excess fat to keep the casserole from getting greasy.
Step 2: Layer eggs and sausage
Once the sausage is ready, arrange the sliced hard-boiled eggs evenly at the bottom of the greased dish. Then scatter the crumbled sausage atop the eggs to create a delicious layered base for the casserole.
Step 3: Whisk the creamy seasoning mixture
In a bowl, combine milk, heavy cream, mustard powder, salt, black pepper, garlic powder, and onion powder. Whisk these together until fully blended — this custard-like mixture will soak into the eggs and sausage, adding moisture and flavor.
Step 4: Assemble and add cheese
Pour the creamy mixture evenly over the layered eggs and sausage. Then sprinkle the shredded Cheddar cheese across the top, offering that beautifully melted golden finish everyone loves.
Step 5: Dot with butter and bake
Distribute small pieces of butter across the cheese layer—this step helps create a rich crust as the casserole bakes. Pop the dish in the oven and bake for 25 to 30 minutes until it’s bubbly and the top is a gorgeous golden brown.
How to Serve Hard-Boiled Egg and Sausage Breakfast Casserole Recipe

Garnishes
Fresh garnishes can really elevate this casserole. A sprinkle of chopped fresh parsley or chives adds vibrant color and a touch of freshness. For a bit of heat, feel free to add a dash of hot sauce or some sliced jalapeños on the side.
Side Dishes
This casserole pairs wonderfully with light, refreshing sides. Crisp fruit salad or a simple arugula salad with lemon vinaigrette balances the richness, while toasted English muffins or buttery croissants complement the savory flavors perfectly.
Creative Ways to Present
If you’re serving guests, why not make it a breakfast buffet? Cut the casserole into small squares and offer a variety of toppings like salsa, sour cream, or avocado slices. This way, everyone can customize their plate and enjoy the Hard-Boiled Egg and Sausage Breakfast Casserole Recipe in their own delicious way.
Make Ahead and Storage
Storing Leftovers
Store any leftover casserole in an airtight container in the refrigerator. It will keep well for up to 3 days, making it a perfect option for busy mornings or quick lunches.
Freezing
This casserole freezes beautifully. After baking and cooling completely, wrap individual portions tightly in plastic wrap and foil, then freeze. When ready to enjoy, thaw overnight in the fridge before reheating.
Reheating
Reheat leftover casserole in the oven at 350°F (175°C) for about 15-20 minutes until warmed through and the cheese is bubbly again. You can also microwave it for a quicker reheating option, but the oven brings back the best texture.
FAQs
Can I use other types of cheese in this casserole?
Absolutely! While Cheddar brings a nice sharpness and melts well, feel free to experiment with cheeses like Monterey Jack, Swiss, or even pepper jack for a bit of spice.
Is it necessary to cook the sausage before assembling?
Yes, cooking the sausage beforehand ensures it’s fully cooked, adds flavor by browning, and helps remove excess fat that could make the casserole too greasy.
Can I make this casserole dairy-free?
You can substitute the milk and heavy cream with dairy-free alternatives like almond or oat milk and use dairy-free cheese to tailor it if you need a dairy-free version.
How can I speed up the hard-boiling of eggs for this recipe?
To save time, place eggs in boiling water for about 9-12 minutes, then immediately transfer them to an ice bath to stop the cooking and make peeling easier.
Is this casserole suitable for meal prep?
Definitely! Its make-ahead nature and easy reheating options make it a fantastic meal prep choice for breakfasts or even brunches throughout the week.
Final Thoughts
This Hard-Boiled Egg and Sausage Breakfast Casserole Recipe truly puts a smile on my face whenever I make it. It combines simplicity with indulgent flavors perfectly, creating a dish that feels like a warm hug on the plate. I encourage you to give it a try, whether for a cozy family morning or a special occasion. Once you do, it might just become your go-to breakfast staple too!
Print
Hard-Boiled Egg and Sausage Breakfast Casserole Recipe
- Prep Time: 10 minutes
- Cook Time: 30 minutes
- Total Time: 40 minutes
- Yield: 6 servings
- Category: Breakfast Casserole
- Method: Baking
- Cuisine: American
Description
This Hard-Boiled Egg Casserole is a savory, protein-packed breakfast or brunch dish combining sliced hard-boiled eggs, flavorful breakfast sausage, and melted Cheddar cheese baked in a creamy, spiced custard. Perfect for a comforting morning meal that’s easy to prepare and serves a crowd.
Ingredients
Egg and Sausage Layer
- 8 hard-boiled eggs, peeled and sliced
- 1/2 pound breakfast sausage, cooked and crumbled
Dairy and Seasoning Mix
- 1 cup shredded Cheddar cheese
- 1/2 cup milk
- 1/2 cup heavy cream
- 1 teaspoon mustard powder
- 1/2 teaspoon salt
- 1/2 teaspoon black pepper
- 1/4 teaspoon garlic powder
- 1/4 teaspoon onion powder
- 2 tablespoons butter (for greasing and dotting)
Instructions
- Preheat and Prepare Dish: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish thoroughly with butter to prevent sticking and add flavor.
- Layer Eggs and Sausage: Arrange the sliced hard-boiled eggs evenly at the bottom of the prepared baking dish. Sprinkle the cooked and crumbled breakfast sausage over the eggs in an even layer.
- Mix Custard: In a mixing bowl, whisk together the milk, heavy cream, mustard powder, salt, black pepper, garlic powder, and onion powder until fully combined and smooth.
- Assemble the Casserole: Pour the custard mixture evenly over the eggs and sausage layers. Then sprinkle the shredded Cheddar cheese evenly on top for a rich, melty finish.
- Add Butter Dots: Place small pieces of butter across the surface of the casserole to enhance browning and flavor during baking.
- Bake: Bake the casserole in the preheated oven for 25 to 30 minutes, or until it’s bubbly and golden brown on top. Let it cool slightly before serving.
Notes
- Ensure the eggs are peeled well to avoid any shell fragments in the casserole.
- For extra flavor, try substituting breakfast sausage with spicy or smoked sausage varieties.
- You can use whole milk instead of heavy cream if you want a lighter texture.
- This dish can be made a day ahead and reheated gently in the oven.
- Leftovers keep well refrigerated for up to 3 days.

