Grilled Cheese Sausage & Egg Breakfast Casserole

I made this Grilled Cheese Sausage & Egg Breakfast Casserole the weekend my kids started asking for “something cheesy” every morning. It’s a hands-off bake that turns ordinary Texas toast, breakfast sausage, eggs, and American cheese into a golden, crunchy-topped casserole that feeds a crowd. Perfect for busy brunches, holiday mornings, or when you want an easy make-ahead breakfast that tastes indulgent without fuss.

Why you’ll love this dish

This casserole hits several useful notes at once: it’s fast to assemble, budget-friendly, and reliably kid-approved because who says no to melty American cheese and a crispy bread topping? It’s also forgiving—day-old bread and pre-cooked sausage work well—so it’s a great option when you want something satisfying without a lot of last-minute prep. Serve it for weekend brunch, a holiday breakfast buffet, or as an easy dinner when you want comfort food that makes plenty of leftovers.

“A simple stack of toast, sausage, eggs, and cheese turned into the best weekend brunch—crispy on top, custardy inside, and never enough for seconds.” — one happy breakfast tester

How this recipe comes together

Think of this as a layered strata with a grilled‑cheese twist. First you brown the sausage and whisk the eggs with milk and seasonings. Then you build layers of Texas toast, cooked sausage, beaten egg, and shredded American cheese in a buttered baking dish—repeat once. Pour the remaining egg mixture over the top and let the bread soak for 10–15 minutes so it becomes custardy during baking. Finally, bake until the top is golden and the center is set. The whole process is mostly assembly + a bake step, so it’s great for prepping ahead or feeding a group.

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What you’ll need

• 1 lb pork breakfast sausage (bulk or patties broken up). Substitute turkey sausage for lower fat or use vegetarian breakfast crumbles for a meatless version.
• 10 large eggs
• 8 slices Texas toast (thick-cut white bread works best; day-old bread absorbs better)
• 1 cup American cheese, shredded (or thinly sliced). Swap for sharp cheddar, Colby‑Jack, or pepper jack for a spicier finish.
• 1 cup milk (whole or 2% for creamier texture; use unsweetened plant milk in a pinch)
• 1/2 tsp garlic powder
• 1/2 tsp onion powder
• Salt and pepper to taste
• Butter for greasing the baking dish (or nonstick spray)

Yields: about 6–8 servings. For a firmer custard, reduce milk to 3/4 cup; for extra custardy fill, increase to 1 1/4 cups.

How to prepare it

1. Preheat the oven to 350°F (175°C). Grease a 9×13-inch (or similar large) baking dish with butter or spray.
2. Brown the pork breakfast sausage in a skillet over medium heat, breaking it into small pieces. Cook until no pink remains and edges are slightly crisp. Drain excess fat and set the sausage aside to cool slightly.
3. In a large bowl whisk together the 10 eggs, 1 cup milk, garlic powder, onion powder, and a pinch each of salt and pepper until well combined. Taste and adjust seasoning—remember the cheese and sausage add salt.
4. Arrange half of the Texas toast slices in a single layer in the prepared dish. Top with half the cooked sausage, then half of the beaten egg mixture (pour enough to wet this layer), and half of the shredded American cheese.
5. Repeat the layers with the remaining bread, sausage, egg mixture, and cheese so you have two even layers. Press the top lightly so the bread soaks up the egg.
6. Allow the assembled casserole to sit for 10–15 minutes so the bread can absorb the egg custard evenly. This step prevents dry pockets and gives a creamier interior.
7. Bake in the preheated oven for 30–35 minutes, or until the top is golden and crispy and the center is set. An inserted knife should come out clean; the internal temperature of an egg casserole should reach 160°F (71°C) for food safety. If the top browns too quickly, tent loosely with foil. For a quicker golden finish, broil 1–2 minutes at the end—watch closely.
8. Let the casserole cool 5–10 minutes before slicing and serving so it sets up and slices cleanly.

Best ways to enjoy it

This casserole is a full meal on its own, but small sides make it even better:

• Fresh fruit salad or sliced melon to cut through the richness.
• Crisp green salad with a lemon vinaigrette for a light contrast.
• Salsa, hot sauce, or pickled jalapeños for heat.
• A dollop of sour cream or a spoonful of guacamole on the side for creaminess.
  Plate a slice with a small pile of mixed greens and a handful of berries for a brunch-worthy presentation.

Storage and reheating tips

• Refrigerate: Cool to room temperature, cover tightly, and store in the fridge within 2 hours. Keeps 3–4 days.
• Freeze: Wrap tightly—cut into portions first for easier reheating—and freeze up to 3 months. Thaw overnight in the fridge before reheating.
• Reheat: Oven method (best for texture): cover with foil and bake at 325°F (160°C) for 15–20 minutes or until heated through. Microwave: reheat individual slices on a microwave-safe plate in 60–90 second bursts, flipping once, until hot. Reheat to 165°F (74°C) internal temp.
  Always discard if left at room temperature longer than 2 hours to avoid food-safety risks.

Pro chef tips

• Use day-old (stale) Texas toast or dry it slightly in a low oven for 5–7 minutes—drier bread soaks up egg better without getting soggy.
• Drain the sausage well (or blot it on paper towels) to avoid a greasy casserole. Too much grease will make the dish heavy and soggy.
• Press the layers gently before baking so the custard evenly saturates the bread.
• For a crisper top, sprinkle an extra 1/4 cup shredded cheese on top 10 minutes before the end of baking, or broil briefly at the very end.
• If assembling the night before, keep the custard and solids separate and combine the next morning, or fully assemble and cover tightly; you may need to add 10–15 minutes to the bake time from chilled.

Creative twists

• Veggie-forward: Swap half the sausage for sautéed bell peppers, onions, or mushrooms.
• Spice it up: Mix a teaspoon of Dijon mustard into the egg mixture and use pepper jack cheese.
• Everything bagel crust: Sprinkle everything bagel seasoning on top before baking.
• Low-carb version: Replace Texas toast with thin slices of roasted sweet potato or use low-carb bread.
• Breakfast-for-dinner: Add cooked bacon or ham instead of sausage, or fold in chopped spinach for color and nutrition.

Your questions answered

Q: Can I make this ahead of time?
A: Yes. You can fully assemble and refrigerate covered overnight. Allow 10–15 extra minutes of bake time if baking straight from the fridge. Alternatively, prep components (cook sausage, shred cheese, whisk eggs) and assemble the morning of.

Q: Can I use regular sliced bread instead of Texas toast?
A: You can, but thicker Texas toast gives a better texture—crisp outside and custardy inside. If using regular bread, use slightly more slices or double them up in places to avoid a thin, soggy casserole.

Q: How do I know when it’s done?
A: The center should be set (no runny egg) and the top golden. A knife inserted in the center should come out clean. For safety, egg dishes should reach 160°F (71°C) internal temperature.

Q: Is there a vegetarian version?
A: Yes—use plant-based breakfast sausage or seasoned tofu crumbles. Keep the eggs and cheese or use plant-based substitutes to make it fully vegetarian.

Q: Can I reduce the fat?
A: Choose lean turkey sausage, drain the cooked meat well, and use low-fat milk and a lower-fat cheese to cut calories. Expect a slightly different texture—possibly less rich and creamy.

If you want, I can provide a shopping list formatted for printing, a scaled-down version for two people, or a printable make-ahead checklist—which would help you prep this for a weekend crowd?