Looking to reclaim your chaotic weekday mornings without settling for a protein bar? This Sausage and Egg Casserole is the ultimate "set it and forget it" breakfast solution. By prepping this hearty, protein-packed dish the night before, you can roll out of bed and straight into a stress-free morning. It's a savory, cheesy bake that tastes even better as leftovers, making it a dream for anyone who loves a good meal prep breakfast.
What makes this sausage and egg casserole overnight method so brilliant is that all the flavors meld together while it sits in the fridge, and the bread soaks up the egg and milk custard base creating this incredible texture that's custardy in the middle with crispy golden edges. The browned breakfast sausage adds savory richness, the sharp cheddar cheese casserole provides gooey pockets of melted goodness, and the whole thing comes together in a 9x13 baking dish casserole that feeds 8-10 people without any last-minute breakfast chaos. Adam calls this "the lazy person's way to look like a breakfast hero," and honestly, he's not wrong.
Jump to:
- Why You'll Love This Sausage and Egg Casserole
- Ingredients for Sausage and Egg Casserole
- How to Make Sausage and Egg Casserole
- My Top Tips for This Recipe
- Little Moments in the Kitchen
- Substitutions for Sausage and Egg Casserole
- Variations on Sausage and Egg Casserole
- Equipment for Sausage and Egg Casserole
- Storage Tips for Sausage and Egg Casserole
- Adam's Tip for Sausage and Egg Casserole
- FAQ about Sausage and Egg Casserole
- Conclusion
- Related
- Pairing
- recipe
Why You'll Love This Sausage and Egg Casserole
- Make it the night before – This make-ahead breakfast casserole assembles in 15 minutes the night before, then you just bake it in the morning with zero effort required
- Feeds a crowd effortlessly – One 9x13 pan serves 8-10 people, making this the perfect holiday breakfast casserole or easy family breakfast casserole for feeding everyone at once
- Endlessly customizable – Start with the basic sausage egg and cheese casserole recipe, then swap in hash browns, add vegetables, or use different breads based on what you have
Ingredients for Sausage and Egg Casserole
The beauty of this bread-based breakfast casserole is that it uses simple, everyday ingredients that come together to create something that tastes way more impressive than the effort required. The egg and milk custard base holds everything together while the sausage and cheese provide all the flavor you need.
What You'll Need
For the Sausage and Egg Casserole:
- 1 pound breakfast sausage (regular, spicy, or turkey sausage)
- 8 slices day-old bread, cut into 1-inch cubes (about 6 cups)
- 2 cups sharp cheddar cheese, shredded (divided)
- 8 large eggs
- 2 cups whole milk
- 1 teaspoon dry mustard powder
- ½ teaspoon salt
- ¼ teaspoon black pepper
- ¼ teaspoon garlic powder
- Nonstick cooking spray or butter for greasing the pan
Optional Add-Ins (choose your favorites):
- 1 cup diced bell peppers (any color)
- ½ cup diced onions
- 2 cups frozen hash browns, thawed
- 1 cup sliced mushrooms
- ¼ cup chopped fresh chives or green onions
- Hot sauce for serving
Why These Ingredients Matter
- Day-old bread works best – Slightly stale bread absorbs the egg mixture better than fresh bread without getting soggy, creating that perfect custardy texture throughout
- Whole milk creates richness – The fat in whole milk makes the custard base creamy and indulgent, while skim milk would make it watery and less satisfying
- Sharp cheddar has bold flavor – Sharp cheddar provides more flavor than mild cheddar, which is important since it needs to stand up to the sausage and eggs
How to Make Sausage and Egg Casserole
Step-by-Step Directions
- Brown the sausage – In a large skillet over medium-high heat, cook the breakfast sausage for 8-10 minutes, breaking it into small crumbles with a wooden spoon until browned and cooked through with no pink remaining, then drain excess grease and set aside to cool slightly.
- Prepare the baking dish – Spray a 9x13-inch baking dish generously with nonstick cooking spray or grease it with butter, making sure to coat the bottom and sides well so the casserole doesn't stick.
- Layer the bread – Spread the cubed bread evenly across the bottom of the prepared baking dish in a single layer (it's okay if some pieces overlap slightly).
- Add sausage and cheese – Sprinkle the cooked sausage evenly over the bread cubes, then scatter 1 ½ cups of the shredded cheddar cheese on top (reserve the remaining ½ cup for later).
- Whisk the egg mixture – In a large bowl, whisk together the eggs, milk, dry mustard powder, salt, pepper, and garlic powder until well combined and slightly frothy. Cooking Tip: Whisking until frothy incorporates air into the eggs, which makes the baked casserole lighter and fluffier instead of dense.
- Pour over everything – Slowly pour the egg mixture evenly over the bread, sausage, and cheese in the baking dish, making sure to cover all the bread cubes (press down gently with a spatula if needed to help the bread absorb the liquid).
- Refrigerate overnight – Cover the baking dish tightly with plastic wrap or aluminum foil and refrigerate for at least 4 hours or overnight (this allows the bread to fully absorb the egg mixture and the flavors to meld together).
- Prepare to bake – In the morning, remove the casserole from the refrigerator and let it sit at room temperature for 15-20 minutes while you preheat your oven to 350°F.
- Add final cheese and bake – Remove the cover and sprinkle the remaining ½ cup of shredded cheese on top, then bake uncovered for 45-50 minutes until the center is set, the edges are golden brown, and a knife inserted in the center comes out clean.
- Rest and serve – Let the sausage and egg casserole rest for 5-10 minutes before cutting into squares (this helps it set up so it doesn't fall apart when you serve it), then cut into portions and serve hot.
My Top Tips for This Recipe
Making the perfect sausage and egg casserole takes just a little know-how, but these tips I've learned through years of making breakfast casseroles will help you get that ideal texture and prevent common issues like soggy bread or undercooked centers. The overnight refrigeration especially makes a huge difference in the final result.
- Use day-old or toasted bread – Fresh soft bread gets too soggy in the egg mixture, so either use bread that's a day or two old, or toast fresh bread lightly before cubing it
- Don't skip the overnight rest – While you technically can bake this immediately, letting it sit overnight allows the bread to fully absorb the custard and creates a much better texture
- Check the center for doneness – The edges will set before the center, so always test the very middle with a knife to make sure it comes out clean before removing from the oven
- Drain the sausage well – Excess grease from the sausage will make your casserole oily and unpleasant, so make sure to drain it thoroughly after browning
Little Moments in the Kitchen
The first time I made this sausage and egg casserole was the morning of Adam's birthday sleepover breakfast, when I had six hungry 11-year-old boys to feed.
I assembled everything the night before while Adam was getting sleeping bags ready, and he wandered into the kitchen asking, "What's that for tomorrow?"
I explained it was a breakfast casserole that would feed all his friends without me having to cook individual orders like a short-order cook.
His eyes got wide and he said, "Wait, so you just make it tonight and then tomorrow it's already done?"
The next morning, I slid the casserole into the oven and actually got to sit down with my coffee while it baked.
When the boys came downstairs following the smell of sausage and cheese, they all crowded around the oven watching it bubble.
Adam very proudly announced, "My mom made this last night but it's cooking right now, it's like magic breakfast."
When I cut into it and served everyone their squares, one of his friends said, "This is way better than the scrambled eggs my dad makes."
Grandma Viola called later that day to wish Adam happy birthday, and he told her all about the "magic casserole" that cooked itself.
She laughed and said, "Well, that's certainly a clever way to feed a crowd. In my day, we would have been up at dawn making pancakes for that many boys."
Adam looked at me very seriously and said, "Grandma doesn't understand the power of overnight breakfast."
Substitutions for Sausage and Egg Casserole
Not everyone has all these ingredients on hand or can eat certain things, so here are some swaps that'll still give you a delicious, hearty breakfast casserole without sacrificing too much of that savory, satisfying flavor. These substitutions work great, though the original recipe definitely gives you the most classic breakfast casserole taste. If you're looking for other make-ahead breakfast ideas, my Maple Bacon Pancake Muffins are another great grab-and-go option.
- Breakfast sausage – Use ground turkey, chicken sausage, or crumbled cooked bacon, or skip the meat entirely for a vegetarian sausage and egg casserole without bread
- Day-old bread – Try croissants for a richer version, sourdough for tangy flavor, or frozen hash browns for sausage and egg casserole with hash browns instead of bread
- Sharp cheddar cheese – Use pepper jack for spice, Swiss for a milder flavor, or a Mexican cheese blend for a southwestern twist
- Whole milk – Use half-and-half for extra richness, or 2% milk works fine (though the casserole will be slightly less creamy)
- Fresh bread cubes – Toast fresh bread cubes in a 300°F oven for 10-15 minutes until slightly dry if you don't have day-old bread
Variations on Sausage and Egg Casserole
Once you've mastered the basic version, there are so many fun ways to customize this simple sausage and egg casserole to match your family's preferences or use up ingredients you already have in your fridge. Adam loves when I add hash browns and extra cheese, while I prefer the lighter version with lots of vegetables. For more breakfast casserole inspiration, check out my Sheet Pan Pancakes for another way to feed a crowd.
- Sausage Egg and Hashbrown Casserole – Replace the bread with 4 cups frozen shredded hash browns (thawed and drained) for a heartier, potato-based breakfast casserole
- Southwestern Sausage and Egg Casserole – Add 1 cup diced bell peppers, 1 can drained green chiles, use pepper jack cheese, and top with salsa and sour cream after baking
- Vegetable Loaded Casserole – Add 1 cup each of diced bell peppers, mushrooms, and spinach (sauté the vegetables first to remove excess moisture)
- Jimmy Dean Sausage and Egg Casserole – Use pre-cooked Jimmy Dean sausage crumbles to save time, or their maple-flavored sausage for a sweet and savory twist
- Sausage Egg and Biscuit Casserole – Replace the bread cubes with 1 can refrigerated biscuit dough torn into pieces for a fluffier, biscuit-style casserole
Equipment for Sausage and Egg Casserole
You don't need any special equipment to make this overnight breakfast casserole, just a standard 9x13 baking dish and a few basic kitchen tools that most people already own. The large skillet for browning the sausage is essential for getting good flavor.
- 9x13-inch baking dish – A standard glass or ceramic baking dish is perfect for this recipe (metal works too but may cook slightly faster)
- Large skillet – For browning the breakfast sausage and breaking it into small crumbles
- Large mixing bowl – For whisking together the egg and milk custard mixture
- Whisk – Essential for thoroughly combining the eggs and milk to create a smooth custard base
- Plastic wrap or aluminum foil – For covering the casserole tightly during the overnight refrigeration so it doesn't dry out
Storage Tips for Sausage and Egg Casserole
This make-ahead breakfast casserole is perfect for meal prep because it stores beautifully in the fridge and reheats well for quick weekday breakfasts all week long. The key is cooling it completely before storing so condensation doesn't make it soggy. For more make-ahead breakfast ideas, my Cinnamon Roll Pancakes are another crowd-pleasing option.
- Room temperature – Let baked casserole cool completely at room temperature for about 1 hour before refrigerating (don't leave it out longer than 2 hours for food safety)
- Refrigerator – Cover cooled casserole tightly with plastic wrap or aluminum foil and store in the fridge for up to 4 days, reheat individual portions in the microwave for 1-2 minutes
- Freezer – Wrap completely cooled casserole (or individual portions) tightly in plastic wrap, then aluminum foil, and freeze for up to 3 months
- Reheating from frozen – Thaw in the refrigerator overnight, then reheat covered in a 350°F oven for 20-25 minutes until heated through
- Make-ahead assembly – Assemble the unbaked casserole up to 24 hours ahead, keep covered in the fridge, then bake as directed (you may need to add 5-10 extra minutes to baking time if it's very cold)
Adam's Tip for Sausage and Egg Casserole
"If you want to make this even better for a birthday breakfast or special morning, use maple sausage and drizzle a tiny bit of maple syrup on top before baking. It sounds weird but it's actually really good with the eggs and cheese. Also, the corner pieces get extra crispy and those are the best parts, so whoever sets the table should get a corner piece."
FAQ about Sausage and Egg Casserole
What's the secret to a good casserole?
The secret to a good breakfast casserole is using enough liquid (the egg and milk mixture) to fully saturate the bread without making it swimming in liquid, which usually means about 1 cup of liquid per 2 cups of bread cubes. Another key secret is letting the assembled casserole rest in the refrigerator for at least 4 hours or overnight, which allows the bread to fully absorb the custard and prevents dry spots or soggy areas in the finished casserole. According to Allrecipes' Sausage Egg Casserole, the make-ahead method also allows all the flavors to meld together, and baking at the right temperature (350°F) ensures the eggs cook evenly without becoming rubbery while the top gets golden brown.
Do you cook sausages before putting them in a casserole?
Yes, you absolutely must cook breakfast sausage completely before adding it to an egg casserole because raw sausage needs to reach 160°F internal temperature to be safe to eat, and by the time the sausage would cook through in the casserole, the eggs would be overcooked and rubbery. Browning the sausage first also develops much better flavor through the Maillard reaction (the browning process) and allows you to drain off excess grease that would otherwise make your casserole oily and greasy. Break the sausage into small crumbles as it cooks so you get evenly distributed sausage throughout the casserole instead of big chunks.
What kind of bread for egg casserole with sausage?
The best bread for sausage egg and cheese casserole with bread is day-old crusty bread like French bread, sourdough, or Italian bread because it has enough structure to hold up to the egg mixture without getting mushy or falling apart. Soft sandwich bread works in a pinch but tends to get soggy, while very dense breads like bagels or English muffins don't absorb the custard as well and can stay dry in spots. You want bread that's slightly stale or toasted because fresh bread has too much moisture and will turn to mush, but if you only have fresh bread, just cube it and toast it in the oven for 10-15 minutes at 300°F until slightly dry.
Do I cook sausage or eggs first?
Always cook the sausage first before adding it to the egg mixture in a casserole because the sausage needs higher heat and longer cooking time than eggs, and mixing raw sausage with eggs would result in greasy, undercooked sausage or overcooked rubbery eggs. The sausage should be fully browned and cooked through (no pink remaining) before you drain it and add it to the casserole, which usually takes 8-10 minutes over medium-high heat. For dishes where you're cooking sausage and eggs separately (like a breakfast skillet), most people still cook the sausage first because it takes longer, then set it aside and cook the eggs in a clean pan so the eggs don't taste like sausage grease.
Conclusion
Whether you're fueling up for a long workday or just want a hot meal ready after school drop-off, this savory breakfast bake never misses. It's versatile, filling, and saves you precious time when you need it most. If you enjoyed this recipe, try swapping the pork sausage for spicy chorizo or turkey sausage to keep things fresh next week!
This overnight casserole proves that the best recipes aren't always the most complicated ones, sometimes the smartest cooking is the kind where you do most of the work when you're not rushed and stressed. If you loved this recipe, I'd love to hear about it in the comments! Did you add hash browns or stick with the bread version? Did your family fight over the crispy corner pieces like Adam does? Drop a rating below and let me know what variations became your family's favorite, and don't forget to check out my Pesto Grilled Cheese for another easy meal that feels special without requiring hours in the kitchen.
Related
Looking for other recipes like this? Try these:
Pairing
These are my favorite dishes to serve with Sausage and Egg Casserole:
recipe
Easy Sausage and Egg Casserole
Equipment
- 1 9×13-inch baking dish Grease well so the casserole releases easily
- 1 Large Skillet
- 1 Large mixing bowl
- 1 Whisk
- 1 Measuring cups and spoons
Ingredients
- 1 pound breakfast sausage Pork or turkey both work well
- 8 slices day old bread Cut into 1 inch cubes
- 2 cups sharp cheddar cheese Shredded and divided
- 8 large eggs
- 2 cups whole milk
- 1 teaspoon dry mustard powder
- 1 half teaspoon salt
- 1 quarter teaspoon black pepper
- 1 quarter teaspoon garlic powder
- 1 tablespoon butter or nonstick spray For greasing the pan
Instructions
- I start by cooking the breakfast sausage in a large skillet over medium-high heat until it is fully browned and crumbly. Once cooked, drain it well so the casserole stays creamy and not greasy.
- I generously grease our 9x13 baking dish with butter. This little step makes serving so much easier later.
- We spread the cubed day old bread evenly across the bottom of the dish.
- Next, we sprinkle the cooked breakfast sausage over the bread, then add most of the sharp cheddar cheese.
- In a large bowl, I whisk together the eggs, whole milk, dry mustard powder, salt, black pepper, and garlic powder until smooth.
- We slowly pour the egg mixture over everything, making sure all the bread gets covered. Gently press the bread down so it soaks it all in.
- I cover the dish and place it in the fridge overnight.
- In the morning, preheat the oven to 350°F, sprinkle the remaining sharp cheddar cheese on top, and bake until golden and set, about 50 minutes. Let it rest before slicing.
Notes
- This casserole is perfect for busy mornings and special family breakfasts.
- You can swap the bread for thawed hash browns to make a sausage and egg casserole with potatoes.
- Turkey sausage works great if you want a lighter option.
- Store leftovers covered in the refrigerator for up to 4 days.
- This recipe freezes well and reheats beautifully for quick weekday breakfasts.
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Most importantly, make this recipe with someone you love. The memories last longer than the leftovers.
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