Sausage & Egg Breakfast Casserole

I remember so many weekend mornings being defined by the incredible aroma that would fill our entire house. It was the scent of savory ground sausage and onions sizzling on the stovetop, a promise of the hearty, comforting meal to come. That smell always meant my Classic Sausage & Egg Breakfast Casserole was on its way to the oven. It’s more than just a recipe to me; it’s a tradition, a warm hug on a plate that brings everyone to the table. The combination of fluffy eggs, sharp cheddar, and savory sausage is simply timeless. It reminds me a bit of the joy another of our family favorites brings, a wonderful Meat Lover’s Pizza Casserole that proves hearty layers are always a good idea. This sausage and egg breakfast casserole is my go-to for lazy Sundays, holiday brunches, and any time I want to serve up something truly special without a ton of fuss.

Why This Dish is a Go-To in My Kitchen

There are so many reasons I turn to this recipe again and again. First, it’s incredibly practical. With just 20 minutes of prep time, I can have it assembled and ready for the oven. The 50-minute cook time is completely hands-off, giving me a moment to sip my coffee and enjoy the morning. I also love that it uses simple, staple ingredients. The combination of savory ground breakfast sausage, sharp cheddar cheese, and day-old bread creates a texture and flavor that is pure comfort. It’s a dish I can always count on to be satisfying, delicious, and loved by everyone I serve it to.

The Key Ingredients You’ll Need

For this casserole, day-old bread is my non-negotiable; it soaks up the egg mixture beautifully without turning mushy. I also insist on sharp cheddar cheese for that perfect tangy flavor. If you love cheesy breakfast dishes, you’ll probably also enjoy my favorite hashbrown casserole.

Reda

Classic Sausage & Egg Breakfast Casserole

A savory and satisfying make-ahead breakfast bake, layered with fluffy eggs, savory sausage, melted cheese, and hearty bread. Perfect for weekend brunches or holiday mornings.

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Prep Time 20 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 10 minutes mins

Servings: 8 servings

Course: Breakfast, Brunch

Cuisine: American

Calories: 485

Ingredients Equipment Method Notes

Ingredients

  

For the Casserole

• 1 lb ground breakfast sausage pork, turkey, or Italian sausage will also work
• 1 small yellow onion finely chopped
• 6-7 cups day-old bread cubed into 1-inch pieces (French bread, brioche, or sourdough work well)
• 2 cups shredded sharp cheddar cheese divided
• 10 large eggs
• 2 cups whole milk room temperature
• 1 tsp dry mustard powder
• 1/2 tsp salt or to taste
• 1/2 tsp black pepper freshly ground
• 2 tbsp fresh chives chopped, for garnish (optional)

Equipment

• 9x13 Inch Casserole Dish
• Large skillet
• Large Mixing Bowl
• Whisk

Method

 

Prepare the Base

1. Preheat your oven to 350°F (175°C). Grease a 9x13 inch casserole or baking dish with butter or non-stick cooking spray.
2. In a large skillet over medium-high heat, cook the ground sausage and chopped onion, breaking the sausage apart with a spoon. Cook until the sausage is browned and no longer pink, about 8-10 minutes. Drain off any excess grease and set aside.

Assemble the Casserole

1. Arrange half of the bread cubes in an even layer in the bottom of the prepared baking dish. Top with half of the cooked sausage mixture and 1 cup of the shredded cheddar cheese.
2. Layer the remaining bread cubes on top, followed by the rest of the sausage mixture. Set aside.

Create the Egg Mixture

1. In a large mixing bowl, whisk together the large eggs until the yolks and whites are well combined. Whisk in the whole milk, dry mustard powder, salt, and black pepper until smooth.
2. Carefully and evenly pour the egg mixture over the layers in the baking dish. Gently press down on the bread with a spatula to ensure it soaks up the egg mixture.
3. Sprinkle the remaining 1 cup of shredded cheddar cheese evenly over the top.

Bake and Serve

1. Bake uncovered for 45-55 minutes, or until the center is set (a knife inserted into the middle comes out clean) and the top is golden brown and puffy. If the top begins to brown too quickly, you can loosely cover it with aluminum foil for the last 10-15 minutes of baking.
2. Remove the casserole from the oven and let it rest for at least 10 minutes before slicing and serving. This allows it to set up properly for cleaner slices.
3. Garnish with fresh chopped chives, if desired, before serving.

Notes

Make-Ahead Tip: For a stress-free morning, assemble the casserole the night before (up to the point of adding the final layer of cheese), cover tightly, and refrigerate. The next morning, sprinkle the remaining cheese on top and let the dish sit at room temperature for 30 minutes before baking. You may need to add 5-10 minutes to the total bake time.
Variations: Feel free to add 1 cup of sautéed vegetables like bell peppers, mushrooms, or spinach. Swap the cheddar for Gruyère, Monterey Jack, or a blend of your favorite cheeses.
Storage: Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in the microwave.

How I Make Classic Sausage & Egg Breakfast Casserole Step-by-Step

Bringing this casserole to life is one of my favorite kitchen rituals. I always start by preparing the base, browning the ground sausage with diced yellow onion until everything is fragrant and cooked through. This step builds the first delicious layer of flavor. Next, I assemble the casserole, layering the toasted, day-old bread cubes in my baking dish and topping them with that savory sausage mixture and a generous amount of shredded sharp cheddar. The magic happens when I create the egg mixture—whisking eggs, whole milk, and a pinch of dry mustard powder until it’s perfectly combined. I pour this custard evenly over the layers, letting the bread soak it all up before it bakes into a golden, puffy masterpiece. It’s a process as comforting as my biscuits and gravy breakfast casserole.

My Tips for the Perfect Outcome

• Don’t Use Fresh Bread: Day-old bread is key to avoiding a soggy casserole.
• Shred Your Own Cheese: Pre-shredded cheese has additives that prevent it from melting as smoothly.
• Let It Rest: Allowing the assembled casserole to sit for 20 minutes before baking lets the bread absorb the egg mixture.

How I Serve and Store This Dish

My favorite way to serve this casserole is with a generous sprinkle of fresh chives right on top for a pop of color and fresh flavor. It’s a complete meal on its own, but it also pairs wonderfully with a simple fruit salad. For leftovers, I let the casserole cool completely before covering it tightly and refrigerating it for up to three days. It reheats beautifully in the oven or microwave, making it a fantastic make-ahead option, much like my go-to sausage and potato casserole.

Frequently Asked Questions

Can I prepare this casserole the night before?

Yes, it’s perfect for making ahead! I often assemble the entire casserole, cover it tightly, and refrigerate it overnight. Just remember to add about 10 minutes to the baking time since it will be starting cold from the fridge.

What kind of bread is best to use?

I find that a sturdy, day-old bread like a crusty baguette, brioche, or sourdough works wonders. These types of bread are absorbent enough to soak up the egg custard without falling apart, giving the finished casserole a wonderful texture.

Can I use a different type of cheese?

Absolutely! While I personally love the flavor of sharp cheddar in this recipe, you can definitely experiment. Gruyère would add a nutty flavor, while Monterey Jack or a Colby blend would give you a milder, extra-creamy result.

How do I know when the casserole is fully cooked?

The casserole is done when the center is set and doesn’t jiggle when you gently shake the dish. The top should be a beautiful golden brown, and a knife inserted near the center should come out clean and hot.

Conclusion

This recipe holds such a special place in my heart, and I truly hope it brings as much joy and comfort to your table as it does to mine. If you give it a try, I would absolutely love to hear what you think in the comments below!