Grilled Cheese Sausage and Egg Breakfast Casserole Recipe
If you’re on the hunt for a hearty, crowd-pleasing breakfast that delivers on flavor and comfort, look no further than the Grilled Cheese Sausage and Egg Breakfast Casserole. This glorious casserole combines rich layers of savory breakfast sausage, fluffy eggs, gooey American cheese, and thick-cut Texas toast, all brought together in a golden, buttery bake that tastes just like your favorite diner breakfast—just more decadent and perfect for sharing.

Ingredients You’ll Need
Gathering these simple, foolproof ingredients is where the magic of this dish begins. Each item adds something special, whether it’s the all-day flavor of breakfast sausage or the creamy melt of cheese, making the Grilled Cheese Sausage and Egg Breakfast Casserole a true breakfast superstar.
- Pork breakfast sausage: Brings savory, meaty depth and hearty texture to every bite.
- Large eggs: Lend richness and body, and create those soft, creamy, scrambled layers.
- Butter: Infuses a golden, indulgent touch both inside and on top of the casserole.
- Whole milk: Adds richness and helps achieve those luscious, custard-like eggs.
- Kosher salt: Brings balance, drawing out the flavors of every ingredient.
- Coarse ground black pepper: Adds a gentle kick and a bit of aromatic warmth.
- Ground mustard: Offers a subtle tang that wakes up the flavors and cuts through the richness.
- Texas toast: These thick slices create the ultimate foundation—soft in the center, beautifully crisp up top.
- American cheese: Melts perfectly for that crave-worthy, gooey pocket in almost every bite.
How to Make Grilled Cheese Sausage and Egg Breakfast Casserole
Step 1: Cook the Sausage
Start by browning the pork breakfast sausage in a large pan over medium-high heat. As it cooks, break it into small crumbles so every bite of your casserole has a bit of that savory, satisfying sausage. Once browned and cooked through, transfer the sausage to a plate and don’t forget to drain off excess fat—this keeps the final bake from becoming greasy.
Step 2: Scramble the Eggs
In the same pan (hello, easy cleanup), melt one tablespoon of butter and lower the heat to medium. Whisk together 10 eggs with 1/4 cup of milk, seasoning generously with salt and pepper. Pour it into the pan and stir gently until the eggs are just set—they should be creamy and slightly soft, as they’ll finish cooking in the oven.
Step 3: Assemble the First Layer
Grab a 9×13 inch baking dish and line it with six slices of Texas toast. This creates a sturdy but indulgent base. Top each slice with a generous helping of American cheese—this will transform the bread into a classic grilled cheese experience as it bakes!
Step 4: Add Sausage and Eggs
Evenly distribute the browned sausage over the cheesy bread layer, then follow with an even layer of the freshly scrambled eggs. Add another round of American cheese slices—this is a breakfast casserole after all, so the more gooey cheese, the better!
Step 5: Pour Over the Egg Mixture
In a separate bowl, whisk together the remaining 8 eggs with 3/4 cup of milk and the ground mustard. Carefully pour this custard mixture over the entire pan, making sure it seeps into all the nooks and crannies to keep everything soft and flavorful.
Step 6: Finish with More Bread and Butter
Cap off your casserole with the remaining Texas toast slices. Melt the last three tablespoons of butter and lovingly brush it over each bread top—this finishing touch ensures you get a perfectly golden, crispy crust after baking.
Step 7: Bake to Perfection
Cover the pan snugly with foil and bake in a preheated 375 degree oven for 20 minutes. Remove the foil and continue baking for another 20 minutes. The aroma will call everyone to the kitchen, and you’ll know it’s ready when the top is golden and the casserole is bubbling at the edges.
How to Serve Grilled Cheese Sausage and Egg Breakfast Casserole

Garnishes
Your Grilled Cheese Sausage and Egg Breakfast Casserole is already rich and robust, but a few finishing touches—think chopped fresh chives, sliced green onions, or a sprinkle of smoked paprika—will brighten the flavors and add a fresh pop of color. For an extra-festive brunch, a scattering of microgreens or diced tomatoes works wonders.
Side Dishes
This casserole is a meal on its own, but pairing it with a crisp green salad or a bowl of mixed berries keeps things fresh and light. Smoked bacon or hash browns on the side will turn brunch into a true feast, perfect for weekends or holidays. And don’t forget hot coffee or fresh orange juice to round it all out!
Creative Ways to Present
For a brunch party, cut the casserole into squares and serve them stacked on a platter with extra cheese melting over the top. For grab-and-go breakfasts, wrap individual portions in parchment to take along. Or, bake the Grilled Cheese Sausage and Egg Breakfast Casserole in individual ramekins for a cute, personalized touch that’s sure to impress your guests.
Make Ahead and Storage
Storing Leftovers
If you’re lucky enough to have leftovers, let the casserole cool completely before covering and refrigerating. Stored in an airtight container, it will keep fresh for up to three days and makes for a quick, satisfying breakfast or snack all week long.
Freezing
For longer storage, tightly wrap individual slices or the whole casserole in both plastic wrap and foil. Freeze for up to two months. To preserve texture and flavor, thaw overnight in the refrigerator before reheating. This makes the Grilled Cheese Sausage and Egg Breakfast Casserole a life-saver for busy mornings!
Reheating
To bring your leftovers back to their ooey-gooey glory, pop slices in a 350 degree oven for about 15 minutes, or until heated through. You can also microwave individual pieces for 1–2 minutes, though the oven method keeps the bread crispy and the interior perfectly warm.
FAQs
Can I use a different type of bread for this casserole?
Absolutely! While Texas toast brings pillowy thickness, you can substitute with sourdough, brioche, or even day-old French bread. Just be sure the slices are thick enough to soak up the egg mixture without turning soggy.
What kind of cheese works best?
American cheese delivers the classic, melty comfort, but feel free to experiment! Sharp cheddar, Colby-Jack, or Monterey Jack will amp up the flavor. Mix and match your favorites to personalize your Grilled Cheese Sausage and Egg Breakfast Casserole.
Is it possible to prep this casserole in advance?
Yes! Assemble the casserole the night before, covering it tightly with foil and storing in the fridge. In the morning, pop it right in the oven for an effortless breakfast or brunch—just add five minutes to the baking time since it will be cold.
Can I make this Grilled Cheese Sausage and Egg Breakfast Casserole vegetarian?
Definitely! Swap the pork sausage for your favorite plant-based sausage or sautéed mushrooms and spinach. You’ll still capture that same filling, savory goodness without the meat.
How do I keep the casserole from turning out soggy?
The key is to use thick bread and make sure it’s not overly fresh or soft. Pour the egg mixture evenly and let everything rest for a moment before baking so the ingredients soak up the liquid. Baking uncovered at the end helps crisp the top, sealing in that comforting texture.
Final Thoughts
You haven’t truly experienced breakfast bliss until you’ve tried this Grilled Cheese Sausage and Egg Breakfast Casserole. It’s warm, cheesy, and totally irresistible—the kind of meal that brings people together and fills the kitchen with joy. Whether it’s your next brunch party or a cozy Sunday morning, give it a whirl and watch it become your new breakfast tradition!
Print
Grilled Cheese Sausage and Egg Breakfast Casserole Recipe
- Total Time: 1 hour
- Yield: 8 servings 1x
- Diet: Vegetarian
Description
This Grilled Cheese Sausage and Egg Breakfast Casserole is a delicious and satisfying meal that’s perfect for breakfast or brunch. It combines savory pork sausage, fluffy scrambled eggs, gooey American cheese, and buttery Texas toast for a hearty dish that will please the whole family.
Ingredients
Pork Breakfast Sausage
- 1 pound
Lrg Eggs
- 18 large, divided
Butter
- 4 tablespoons, divided
Whole Milk
- 1 cup, divided
Kosher Salt
- 1/4 teaspoon
Coarse Ground Black Pepper
- 1/2 teaspoon
Ground Mustard
- 1/2 teaspoon
Texas Toast
- 12 slices
American Cheese
- 12 slices
Instructions
- Preheat oven to 375 degrees. Cook the breakfast sausage in a large pan until browned, breaking it apart. Drain fat.
- Add butter to the pan. Whisk 10 eggs with milk, salt, and pepper. Scramble eggs until set.
- Layer ingredients in a 9×13 pan. Top with cheese, sausage, eggs, more cheese, and bread.
- Prepare egg mixture. Pour over the pan, top with remaining bread slices. Brush with melted butter.
- Bake covered for 20 minutes, then uncovered for an additional 20 minutes.
Notes
- This casserole can be assembled the night before and refrigerated, then baked in the morning for a quick breakfast.
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Category: Breakfast, Brunch
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 425
- Sugar: 3g
- Sodium: 870mg
- Fat: 29g
- Saturated Fat: 13g
- Unsaturated Fat: 12g
- Trans Fat: 0g
- Carbohydrates: 20g
- Fiber: 1g
- Protein: 21g
- Cholesterol: 285mg
Keywords: Grilled Cheese, Sausage, Egg, Breakfast Casserole, Brunch