Baked Egg and Sausage Casserole Recipe: One-Pan Breakfast That Feeds a Crowd

This baked egg and sausage casserole recipe transforms a simple breakfast into a crowd-pleasing one-pan wonder that’s ready in under an hour. The secret lies in layering crispy breakfast sausage with fluffy eggs and creamy cheese, creating a dish that’s easy to make but feels like a restaurant-quality meal. I’ve perfected this recipe over years of feeding hungry families and guests—no one ever leaves a bite behind.

The beauty of this dish is its simplicity: just a handful of ingredients, one baking dish, and 30 minutes of active time. You can customize it with your favorite herbs, cheeses, or even a splash of cream for extra richness. The sausage adds savory depth, while the eggs create a tender, custardy texture that holds together beautifully when baked. It’s the kind of dish that works for brunch, a hearty breakfast before a hike, or even a comforting dinner.

What you’ll end up with is a golden, bubbling casserole with perfectly cooked eggs and crispy sausage peeking through the creamy cheese topping. The aroma alone will have everyone gathering around the table, and the first bite delivers that satisfying mix of textures—crispy, creamy, and savory. This is the kind of recipe that makes you look like a breakfast pro without the fuss.

Serve it with a side of toasted bread or fresh fruit to round out the meal, or let it stand alone as a satisfying, protein-packed dish. The best part? Leftovers reheat beautifully, making it perfect for meal prep. Let’s get started!

Ingredients for baked egg and sausage casserole

Just 11 simple ingredients transform into a crowd-pleasing breakfast casserole that's ready in 30 minutes.

The sausage is the star here—pre-cooked breakfast sausage from the deli section (the kind in tubes) works perfectly. I always grab Johnsonville or Bob Evans because they're consistent, but any good-quality brand will do. If you're using fresh sausage, brown it first to render the fat. The eggs? Room temperature makes all the difference—they'll cook more evenly and won't curdle. Cheddar is non-negotiable for that classic flavor, but Monterey Jack adds a nice creaminess if you want to mix it up. For the cheese, I always buy the block and grate it myself—pre-shredded gets clumpy when baked.

No heavy cream on hand? Skip it or use an extra splash of milk—the dish will still be delicious. Fresh parsley is ideal, but dried works at one-third the amount (and lasts longer). The flour is just for thickening the egg mixture—don't skip it, but don't overmix either. Want more flavor? Add 1/2 tsp smoked paprika or a pinch of cayenne for heat. The butter is only for greasing the dish, but if you're feeling fancy, brown it lightly first for nutty flavor. For the garlic powder, I use Penzeys brand—it's worth the splurge for that authentic taste.

This casserole reheats beautifully—honestly tastes better the next day once everything melds together. Store leftovers in an airtight container for up to 4 days in the fridge, or freeze portions for 3 months. I always double the recipe when I make this—one pan for now, one for later. For meal prep, assemble it the night before and bake in the morning. The flavors develop even more overnight, making it perfect for busy mornings. Serve with toasted sourdough or fresh fruit to round out the meal.

Step-by-step instructions for baked egg and sausage casserole

Here's how to make this hearty breakfast casserole that's ready in under an hour.

In a large skillet over medium heat, cook the 1.5 lb breakfast sausage according to package instructions until fully heated through and any released liquid has evaporated. I like to break it up with a wooden spoon as it cooks to create smaller, even pieces that'll distribute better in the casserole.

Once cooked, drain any excess grease but leave about 2 tablespoons in the pan for added flavor. Transfer the sausage to a large bowl and set aside. The sausage should be warm but not crispy—it'll get plenty of time to crisp up later in the oven. This step takes about 8-10 minutes depending on your sausage brand.

In a separate large bowl, whisk together the 12 whole large eggs (room temperature) and the 1.5 cups whole milk until fully combined. Add the 0.5 cup all-purpose flour, 1.5 tsp salt, 1 tsp black pepper, 1 tbsp dried parsley, and 1 tsp garlic powder, whisking until everything is evenly distributed and no flour streaks remain.

This mixture should be smooth and slightly thick—like a well-stirred pancake batter. If you notice any lumps, strain it through a fine-mesh sieve to ensure a silky texture in your casserole. The egg mixture is the foundation of our dish, so take your time getting it just right.

Add the cooked breakfast sausage to the egg mixture and stir gently to combine. Then fold in the 2 cups shredded cheddar cheese until evenly distributed. Pour the mixture into a 9x13-inch baking dish that's been lightly greased with melted butter (about 2 tablespoons spread evenly on the bottom and sides).

Here's the thing—don't overmix after adding the cheese. Just give it a few gentle stirs to distribute it evenly. You want pockets of melted cheese throughout, not a completely blended mixture. This creates that perfect cheesy pull-apart texture we all love.

Preheat your oven to 350°F while you prepare the casserole. Once the oven is hot, bake the casserole for 35-40 minutes until the top is golden brown and the center is just set—no jiggling when you gently shake the pan.

For the last 5 minutes of baking, you can add the 0.5 cup heavy cream (if using) by carefully pouring it over the top. This optional step adds extra richness and helps create a beautiful, golden crust. The casserole is done when it springs back slightly when touched and the edges pull away from the pan.

Remove the casserole from the oven and let it rest for 5 minutes before serving. This resting time allows the center to fully set while keeping the texture tender. The casserole will be hot and ready to serve—cut into squares and enjoy the warm, cheesy goodness.

For best results, serve immediately while everything is hot. If you need to reheat leftovers, cover with foil and warm in the oven at 300°F for 10-15 minutes or until heated through. This casserole tastes even better the next day, making it perfect for meal prep!

Flavor customization for this dish

Spicy Kick

Add 1 teaspoon cayenne pepper or 2 teaspoons hot sauce (like Cholula) to the egg mixture for a subtle kick. For more heat, stir in ¼ cup diced jalapeños or 1 tablespoon gochujang with the sausage. I love adding a pinch of smoked paprika too—it deepens the flavor while keeping the heat balanced. 🌶️

Creamy Luxe

Swap out some milk for ½ cup heavy cream or ½ cup sour cream in the egg mixture for a richer texture. For extra decadence, fold in ½ cup cream cheese with the shredded cheddar. This creates a velvety, custard-like center that pairs perfectly with the crispy sausage. Trust me, it’s worth the splurge!

Herb Infusion

Boost freshness with 2 tablespoons chopped fresh chives or 1 tablespoon chopped fresh dill mixed into the egg mixture. For a Mediterranean twist, add 1 teaspoon dried oregano and ½ teaspoon dried thyme> along with the garlic powder. Fresh herbs brighten up the dish and cut through the richness beautifully.