Cheesy Sausage Breakfast Casserole: Your Ultimate Weekend Brunch Hero!
This Cheesy Sausage Breakfast Casserole simplifies feeding a hungry crowd with minimal morning effort.
Prepare this hearty dish in just 15 minutes the night before, then bake for 50-55 minutes in the morning.
It’s ideal for holiday brunches, weekend gatherings, or convenient meal prep, providing a satisfying start to any day.
Combining savory breakfast sausage, fluffy eggs, and sharp cheddar, this casserole delivers comforting flavors. The bread soaks up the eggy goodness overnight, resulting in a perfectly textured, creamy, and firm dish.
Assembling it hours ahead means you can simply pop it into the oven when ready, freeing up valuable morning time for busy households or entertaining. It reheats beautifully for quick breakfasts throughout the week. Pair with fresh fruit or a simple green salad.
Cheesy Sausage Breakfast Casserole
Prepare a make-ahead breakfast casserole with savory sausage, eggs, and a blend of cheeses. Bake until golden.
Ingredients
- 1 tablespoon (15g) unsalted butter, softened
- 6 slices day-old bread, cut into 1-inch (2.5 cm) cubes (approximately 4 cups / 180g)
- 1 lb (450g) ground breakfast sausage
- 1 medium (150g) yellow onion, finely diced
- 1 medium (150g) green bell pepper, cored, seeded, and finely diced
- 2 cups (240g) shredded sharp cheddar cheese, divided
- 1 cup (120g) shredded Monterey Jack cheese
- 12 large eggs
- 2 cups (480ml) whole milk
- 1/2 cup (120ml) heavy cream
- 1 teaspoon (5g) kosher salt
- 1/2 teaspoon (2.5g) freshly ground black pepper
- 1 teaspoon (3g) ground dry mustard
- 1/4 teaspoon (0.5g) red pepper flakes
Instructions
- Preheat oven to 350°F (175°C). Grease a 9×13 inch (23×33 cm) baking dish with 1 tablespoon (15g) softened unsalted butter. Arrange 6 slices (4 cups / 180g) cubed day-old bread in the bottom of the dish.
- Brown 1 lb (450g) ground breakfast sausage in a large skillet over medium-high heat for 8-10 minutes, until no pink remains. Drain excess grease. Add 1 medium (150g) diced yellow onion and 1 medium (150g) diced green bell pepper. Sauté for 5-7 minutes until vegetables soften and become translucent. Remove from heat.
- Sprinkle 1 cup (120g) shredded sharp cheddar cheese (half of total) and 1 cup (120g) shredded Monterey Jack cheese over the bread cubes. Spoon the cooked sausage and vegetable mixture over the cheese layer.
- Whisk 12 large eggs in a large mixing bowl for 1-2 minutes until combined. Add 2 cups (480ml) whole milk, 1/2 cup (120ml) heavy cream, 1 teaspoon (5g) kosher salt, 1/2 teaspoon (2.5g) freshly ground black pepper, 1 teaspoon (3g) ground dry mustard, and 1/4 teaspoon (0.5g) red pepper flakes. Whisk for 1 minute until smooth.
- Pour egg custard over the sausage, vegetable, cheese, and bread layers. Press down any floating bread cubes. Cover the dish with foil. Refrigerate for 30 minutes to 12 hours.
- If refrigerated, remove casserole 30 minutes before baking. Place foil-covered dish in preheated 350°F (175°C) oven and bake for 30 minutes. Remove foil, sprinkle remaining 1 cup (120g) shredded sharp cheddar cheese over top, and return to oven, uncovered.
- Bake uncovered for an additional 15-20 minutes, until the top is golden brown, cheese is melted and bubbly, and a knife inserted into the center comes out clean. The internal temperature should reach 160°F (71°C).
- Remove casserole from oven. Rest for 10-15 minutes before serving. Serve warm.
Notes
- Assemble casserole the night before and refrigerate. Add 10-15 minutes to initial covered baking time if baking from cold.
- Substitute Swiss, Gruyère, Colby Jack, or sharp provolone cheese for varied flavor.
- Add finely diced mushrooms, sautéed and squeezed dry spinach, or chopped roasted red peppers. Sauté with onion and bell pepper.
- Increase red pepper flakes to 1/2 teaspoon (1g) or use spicy breakfast sausage. Add hot sauce to egg mixture for extra spice.
- Store leftover casserole in an airtight container in the refrigerator for 3-4 days. Reheat individual portions in a microwave. Reheat larger portions in a 300°F (150°C) oven for 15-20 minutes, until heated through.
- After baking and cooling, cut into portions. Wrap tightly in plastic wrap, then foil. Store in a freezer-safe bag for 2-3 months. Thaw overnight in the refrigerator before reheating.
Nutritional Information (per serving, estimated)
- Calories:450 kcal
- Fat:32g
- Saturated Fat:15g
- Cholesterol:280mg
- Sodium:850mg
- Carbohydrates:18g
- Fiber:1g
- Sugar:5g
- Protein:25g
Pro Tips for a Perfect Cheesy Sausage Breakfast Casserole
Ingredient Tips
- Sausage Browning:Brown your breakfast sausage in a large skillet over medium-high heat for 6-8 minutes. Break it into consistent 1/4-inch crumbles with a wooden spoon as it cooks until no pink remains, ensuring even distribution and texture throughout the casserole.
- Bread Preparation:Use day-old crusty bread (sourdough or French baguette are ideal). Tear or cut into 1-inch cubes. If using fresh bread, toast it on a baking sheet at 300°F for 10-12 minutes until slightly dried out; this crucial step prevents a soggy casserole.
- Cheese Selection:Always grate your own sharp cheddar cheese from a block. Use 2 cups (8 oz) for optimal melt and superior flavor. Pre-shredded cheese contains cellulose, an anti-caking agent, which can prevent a truly smooth, molten cheese texture.
- Optimal Dairy Ratio:For a standard 9×13-inch casserole, the precise ratio of 1.5 cups whole milk to 6 large eggs is key. This specific measurement delivers a rich, custardy texture that sets beautifully without being too dense or overly runny.
- Vegetable Sauté:Sauté diced onions (1/2 cup) and bell peppers (1/2 cup) in 1 tablespoon of the reserved sausage fat until softened, about 5-7 minutes. This pre-cooking step builds a deeper, more complex flavor foundation for the entire dish.
Technique Tips
- Overnight Absorption:Assemble the casserole at least 4 hours, and ideally overnight (up to 24 hours), before baking. This extended resting period allows the bread cubes to fully absorb the egg mixture, yielding a consistently moist, custardy texture throughout.
- Even Bread Distribution:Before pouring the egg mixture, ensure bread cubes are evenly distributed across the entire 9×13-inch baking dish. Use a spatula to gently push some cubes slightly below the surface, guaranteeing thorough saturation and preventing dry spots.
- Precise Baking & Doneness:Preheat your oven to exactly 375°F. Bake for 45-55 minutes. Check doneness at 45 minutes: a thin knife inserted into the absolute center should come out clean, and the casserole edges should be visibly bubbling and golden brown.
- Post-Bake Resting:Once baked, let the casserole rest uncovered on a wire rack for 10-15 minutes before serving. This crucial step allows the internal temperature to equalize and the casserole to set properly, ensuring clean, intact slices.
- Preventing Over-Browning:If the top of your casserole begins to brown too quickly during the last 15-20 minutes of baking, loosely tent it with aluminum foil. This shields the surface, preventing over-browning while allowing the center to finish cooking perfectly.
Common Issues
- Soggy Bottom:To fix a soggy bottom, first, toast your bread cubes at 300°F for 10-12 minutes to ensure they’re adequately dry. Second, reduce the total milk content by 1/4 cup, using 1.25 cups of milk for a 9×13-inch pan, which slightly thickens the custard.
- Dry Edges/Top:If your casserole consistently has dry edges, cover the dish tightly with aluminum foil for the first 30 minutes of baking. Remove the foil and continue baking for the remaining 15-25 minutes until the top is golden brown. This traps crucial moisture early on.
- Undercooked Center:An undercooked center typically indicates insufficient baking. Increase baking time by 5-10 minutes, or raise your oven temperature by 25°F (e.g., from 350°F to 375°F). The center should reach an internal temperature of 160°F, confirmed with an instant-read thermometer.
- Bland Flavor Profile:To boost flavor, ensure adequate seasoning for a 9×13-inch casserole. Add 1 teaspoon of smoked paprika and 1/2 teaspoon of garlic powder to the egg mixture. Also, increase salt to 1.5 teaspoons, ensuring it sufficiently seasons the bread and eggs.
- Cheese Not Melty Enough:For a beautifully molten top, use freshly grated cheese (2 cups/8 oz). Stir 1/4 cup of the cheese into the egg mixture. Sprinkle the remaining 1.75 cups (7 oz) over the top only during the last 15 minutes of baking, ensuring it’s golden and bubbly without burning.
How to Store and Reheat Your Cheesy Sausage Breakfast Casserole
Refrigerator Storage
Duration: 3-4 days in an airtight container
To maintain optimal freshness and prevent flavor transfer, store any leftover Cheesy Sausage Breakfast Casserole in a clean, airtight glass or BPA-free plastic container. For the best taste and texture, consume the casserole within the first 2 days. Beyond that, the egg texture can firm up, becoming a bit denser, and the cheese may lose some of its original creaminess, becoming slightly drier. While still safe to eat, the vibrant flavors and comforting appeal will begin to dull after day 3. Ensure the casserole is completely cooled before transferring to the refrigerator to prevent condensation.
Freezer Storage
Duration: 2-3 months
Freezing is an excellent option for extending the life of your Cheesy Sausage Breakfast Casserole. For whole casseroles, wrap the cooled dish tightly in several layers of plastic wrap, followed by a layer of heavy-duty aluminum foil to prevent freezer burn. For individual portions, slice the cooled casserole into serving sizes, wrap each piece individually in plastic wrap, and then place them in a freezer-safe zip-top bag or container. This method allows for convenient single-serve reheating. When ready to enjoy, transfer the frozen casserole or individual portions to the refrigerator to thaw overnight (8-12 hours). Expect some slight changes in texture; the eggs may become a bit spongier, and the cheese might release a little moisture or be slightly less smooth upon reheating compared to a fresh casserole.
Reheating Instructions
- Oven (Best Method):Preheat oven to 350°F (175°C). For refrigerated casserole, cover with foil and bake for 15-20 minutes. For thawed casserole (from freezer), cover with foil and bake for 20-25 minutes. If you prefer a crispier top, remove the foil for the last 5 minutes. The casserole is ready when the center is hot and bubbly, reaching an internal temperature of 165°F (74°C). This method best preserves the casserole’s original texture and ensures even heating.
- Microwave (Quickest, but may alter texture):Place an individual slice on a microwave-safe plate and cover it with a damp paper towel to retain moisture. For refrigerated portions, heat on high for 1.5-2 minutes. For thawed portions, heat on high for 2-3 minutes. Reheat until steaming hot throughout. Be aware that microwaving can cause the eggs to become slightly rubbery and the cheese might not melt as smoothly as in the oven.
- Air Fryer (Good for individual crisping):Preheat air fryer to 300°F (150°C). Place a single slice of refrigerated casserole in the air fryer basket (do not overcrowd). Cook for 8-10 minutes. For thawed portions, cook for 10-12 minutes. This method is excellent for achieving crispy edges and a nice exterior, ensuring the casserole is hot through the center.
The oven method consistently yields the best results for reheating Cheesy Sausage Breakfast Casserole, ensuring even heating and maintaining the casserole’s desirable texture and crispness. The Air Fryer is an excellent alternative for individual slices, providing delightful crispy edges. While the Microwave is the quickest option, it can lead to a slightly rubbery egg texture and less perfectly melted cheese.
Make-Ahead Tips
Preparing your Cheesy Sausage Breakfast Casserole in advance can be a lifesaver for busy mornings. You can prep individual components 1-2 days ahead: cook and crumble the sausage, shred the cheese, and dice any vegetables. Store the cooked sausage and shredded cheese in separate airtight containers in the refrigerator. The egg mixture (whisked eggs, milk, and seasonings) can also be prepared and stored in a covered bowl in the refrigerator; just give it a good whisk again before pouring. For ultimate convenience, assemble the entire casserole the night before, cover it tightly with aluminum foil or plastic wrap, and refrigerate. Simply pop it into the oven for baking the next morning, allowing for an extra 5-10 minutes of bake time due to starting from a cold state.