Easy Cheesy Breakfast Casserole | Family Morning Favorite
You pull the dish from the oven and the top is puffed and golden brown, little bubbles of melted cheese popping at the edges. Underneath, the bread has soaked up the egg custard until it's soft and rich, with pockets of turkey sausage and bell pepper in every square.
Eggs, bread cubes, shredded cheddar, and turkey sausage make the base, and the whole thing is ready in about an hour, perfect for a holiday brunch or a slow Sunday at home.
| Prep | Cook | Total | Servings | Difficulty |
|---|---|---|---|---|
| 20 min | 40 min | 1 h | 8 servings | Medium |
Why We Make It on Repeat
- One dish, no fuss: Everything bakes together in a single pan, so breakfast for six people means one pan to wash.
- Make-ahead friendly: You can assemble the Cheesy Breakfast Casserole the night before and bake it straight from the fridge in the morning.
- Budget-friendly protein: Eggs, bread, and turkey sausage feed a crowd without a big grocery bill.
What You Need for Cheesy Breakfast Casserole: Ingredients
- Eggs: the custard base that holds everything together; use whole eggs, not egg substitute, for the richest texture.
- Day-old bread: cubed and slightly stale, it soaks up the egg mixture without turning mushy; a baguette or sourdough loaf both work well.
- Shredded cheddar cheese: melts into gooey pockets throughout; Monterey Jack or a Colby blend swaps in easily.
- Turkey sausage: browned and crumbled, it adds savory depth; turkey bacon, chopped and cooked, is a good substitute.
- Whole milk: thins the eggs so the custard bakes evenly; half-and-half makes it richer if you want that.
- Bell peppers and onion: sautéed first for sweetness and color; frozen diced peppers work in a pinch.
- Butter: for greasing the dish and sautéing the vegetables; olive oil is a fine stand-in.
- Salt, pepper, and a pinch of paprika: season the eggs and give the top a faint golden color.
Find exact amounts and quantities in the recipe card below.
Cheesy Breakfast Casserole Step by Step
- Brown the sausage. Cook the turkey sausage in a skillet over medium heat until no pink remains and the edges turn slightly crisp, about 6 minutes.
- Sauté the vegetables. In the same skillet, cook the onion and bell pepper in butter until softened and fragrant, about 5 minutes.
- Whisk the custard. Beat the eggs with milk, salt, and pepper until smooth and pale yellow.
- Layer and soak. Spread the bread cubes in a greased baking dish, scatter the sausage, vegetables, and half the cheese on top, then pour the egg mixture over everything and press down gently so the bread absorbs it.
- Bake until set. Top with the remaining cheese and bake at 350°F for 35 to 40 minutes, until the center is firm and the top is golden brown and puffed.
What to Serve With It
This casserole pairs well with fresh fruit salad for a bright, juicy contrast, crispy hash browns for extra crunch, or a simple green salad with vinaigrette if you're serving it at brunch instead of breakfast.
Easy Variations
- Swap the protein: Use cooked, crumbled turkey bacon or diced ham-style turkey instead of sausage.
- Go vegetable-heavy: Add sautéed spinach, mushrooms, or zucchini for a lighter, veggie-forward version.
- Turn up the heat: Stir in diced jalapeños or a dash of hot sauce into the egg mixture for a spicier bite.
Storage and Reheating
Store leftover Cheesy Breakfast Casserole covered in the fridge for up to 4 days; the texture stays soft since the bread has fully absorbed the custard. Freeze baked and cooled squares for up to 2 months, wrapped tightly, and thaw overnight in the fridge before reheating. Warm individual portions in a 325°F oven for about 15 minutes, or microwave for 1 to 2 minutes, until heated through and the cheese melts again.
Cheesy Breakfast Casserole
Ingredients
Method
- Preheat the oven: Preheat the oven to 350°F and grease a 9x13-inch baking dish with butter.
- Brown the sausage: Cook the turkey sausage in a large skillet over medium heat, breaking it apart with a spoon, until no pink remains, about 6 minutes. Transfer to a plate and set aside.
- Sauté the vegetables: In the same skillet, melt the butter and cook the onion and bell pepper until softened and fragrant, about 5 minutes.
- Whisk the egg custard: In a large bowl, whisk the eggs, milk, salt, pepper, and paprika until smooth and evenly combined.
- Layer the bread: Spread the cubed bread evenly across the bottom of the prepared baking dish.
- Add sausage and vegetables: Scatter the cooked sausage and sautéed vegetables over the bread, then sprinkle with half of the shredded cheese.
- Pour the custard: Pour the egg mixture evenly over the bread and toppings, pressing down gently with a spatula so the bread soaks it up.
- Rest before baking: Let the dish sit for 10 minutes so the bread absorbs more of the custard, or cover and refrigerate overnight.
- Top with cheese: Sprinkle the remaining shredded cheese evenly over the top of the casserole.
- Bake until golden: Bake for 35 to 40 minutes, until the center is firm, the top is puffed, and the cheese turns golden brown at the edges.
- Rest and serve: Let the casserole rest for 5 minutes before slicing into squares, so it holds together neatly.
Cheesy Breakfast Casserole: Your Questions
Can I assemble this the night before?
Yes, cover the unbaked dish tightly and refrigerate overnight; add about 10 extra minutes to the bake time since it starts cold.
Why is my casserole soggy in the middle?
This usually means the bread was too fresh or the dish needed a few more minutes in the oven; the center should feel firm, not wet, when you press it lightly.
What bread works best for this casserole?
Sturdy, slightly stale bread like sourdough, French bread, or challah holds its shape better than soft sandwich bread, which can turn mushy.
Can I use egg whites instead of whole eggs?
You can replace up to half the eggs with egg whites, but the custard will be less rich and the color paler.
