A delicious overnight sausage and egg breakfast casserole that’s prepared the night before, and ready to bake in the morning!
Looking for more breakfast recipes? Consider trying my French Toast Roll-Ups or Strawberry Crepes!
![A slice of overnight breakfast casserole served on a plate, with a bite taken out of it.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-8.jpg)
What I love about this breakfast:
- No mess or work in the morning! Just wake up and pop it in the oven, making it the perfect breakfast for Christmas morning, baby showers, brunch, or even just a regular busy weekday!
- Leftovers reheat great to enjoy for several days.
- Easy to adapt based on your own preferences.
How to make Overnight Breakfast Casserole:
Prepare pan by lining the bottom of a 9×13” pan with slices of white bread. (I’ve found that plain old white sandwich bread works best).
![A casserole dish with slices of white bread laid along the bottom.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-2-4.jpg)
Sprinkle cheese on top of bread. (I use medium cheddar or Colby jack, but feel free to experiment with your favorite kind of cheese!)
![Shredded cheese spread over bread slices in a casserole dish.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-2-6.jpg)
Add browned sausage, onions, bell peppers and green chiles on top. (The green chiles add great flavor, and a little bit of spice. Feel free to substitute a mild salsa).
![Ground sausage and sautéed bell peppers on top of shredded cheese and white bread, in a baking dish.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-2-8.jpg)
Whisk eggs in a mixing bowl. Add milk, salt, paprika, oregano, black pepper, garlic powder, and dry mustard and whisk well to combine.
![Whisked eggs, milk and spices in a bowl.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-2-9.jpg)
Stir the egg mixture as you pour it evenly all over the top of the assembled casserole. Cover baking dish and place in the refrigerator overnight (or refrigerate for at least 6 hours).
Bake (uncovered) for 50-60 minutes or until center is set and outside edges are golden brown. Cool for 15 minutes before serving. I like to serve it with fresh avocado slices, to balance out the flavors.
![A pan of baked overnight breakfast casserole, ready to be cut and served.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-3.jpg)
Freezing Instructions:
To Freeze: Prepare the full recipe, but don’t bake it. Cover pan with plastic wrap and then aluminum foil and freeze for 2-3 months. Allow to thaw overnight in the refrigerator, then let it come to room temperature before baking according to recipe instructions.
Recipe Variations:
- Veggies: Add more veggies or different veggies, like mushrooms or spinach. Use your favorite kind of cheese, if you’d like!
- Salsa: Substitute salsa for the green chilies.
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Recipe
![A slice of overnight breakfast casserole served on a plate, with a bite taken out of it.](https://tastesbetterfromscratch.com/wp-content/uploads/2017/11/Overnight-Breakfast-Casserole-Web-8-500x500.jpg)
Overnight Egg and Sausage Breakfast Casserole
Ingredients
- 6-8 slices white bread , crust removed
- 4 cups freshly shredded colby jack cheese , or cheddar cheese
- 12 ounces pork sausage
- 1/4 medium onion , chopped
- 1/2 red bell pepper , chopped
- 4 ounce can diced green chiles
- 6 large eggs
- 2 cups milk
- 1 teaspoon Kosher salt
- 1/2 teaspoon paprika
- 1/2 teaspoon dried oregano leaves
- 1/2 teaspoon freshly ground black pepper
- 1/4 teaspoon garlic powder
- 1/4 teaspoon dry mustard
Instructions
- Remove the crust from the bread slices. Lightly butter or grease a 9×13” baking pan.
- Arrange the bread slices in the baking dish to cover the bottom of the pan, with no spaces.
- Brown sausage in a skillet over medium heat, breaking it up into small pieces. Drain Grease and remove to plate.
- Add onions and bell peppers to skillet and saute until slightly tender, 3-5 minutes. Add green chiles.
- Sprinkle freshly grated cheese evenly over the the bread in the 9×13” pan. Add the cooked sausage evenly on top, followed by the onions, bell pepper, and green chiles.
- Whisk the eggs in a medium sized mixing bowl. Add milk, salt, paprika, oregano, black pepper, garlic powder, and dry mustard and whisk well to combine.
- Slowly stir the egg mixture as you pour it evenly all over the top of the assembled casserole. Cover baking dish and place in the refrigerator overnight (or refrigerate for at least 6 hours)
In the morning:
- Preheat oven to 350 degrees F. Bake (uncovered) for 50-60 minutes or until center is set and outside edges are golden brown.
- Allow to cool for 15 minutes before cutting into it and serving.
Notes
- Veggies: Add more veggies or different veggies, like mushrooms or spinach. Use your favorite kind of cheese!
- Salsa: Substitute salsa for the green chilies.
Nutrition
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HAVE YOU TRIED THIS RECIPE?!
RATE and COMMENT below! I would love to hear your experience.
I originally shared this recipe November 2017. Updated August 2021.
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This could be the best breakfast casserole I’ve ever made! (Even without the meat and veggies because of a picky eater.) It was pillowy, deliciously seasoned and custard-like. Yummy!
Totally enjoyed this recipe…made it ahead & baked Christmas morning. It was a favorite! Next time will probably try with spinach added. Thank you!
We love this breakfast casserole. I added bacon as well and did 2 cups of Colby Jack and 2 cups of sharp cheddar. My go to from now on for Christmas morning too.
I made this today for brunch and it was fabulous. I played with it a bit and added more eggs and spinach. I upped the spices a bit also. Everyone raved about it. It was so easy and fast also. Thank you. It will be our Christmas morning breakfast this year!
Amazing recipe. So, I hate it when people say they changed it up & then rate it, but I think my changes aren’t truly changes (except for 1). I used sourdough wheat bread slices; I used chili & smoked paprika Hill’s pork sausage; I used 2 leeks instead of onion; I used pepper jack cheese instead of cheddar to make up for no green chilies; I didn’t use paprika b/c it was in the sausage I used; I didn’t use mustard b/c my hubby hates it (only true change). IT WAS AMAZING. will try with other sausage flavor & different cheese; Red bell pepper a must. served to guests – 4 of us ate the entire thing.
Can I cut the recipe in half to make for 6 people?
Your recipies look and sound yummy! Love it, as I didn’t have to sign on, follow, or give my e-mail before I could look,thank you!!!
I love your recipes. Very easy thanks for sharing
Very yummy! I add 9-10 eggs to make it fluffier. So good and I love to have leftovers to freeze.
Same! Up the amount of eggs
Can you freeze the leftovers?
Yes you can. Make sure they are cool and place them in a freezer safe bag. Reheat in mircowave.
Can i use ham to replace sausage?.
Yes that’s fine.
Made this last Christmas. Made again yesterday for this mornings breakfast. This time I added two extra eggs and only used 2 cups of cheese. Much lighter, didn’t miss the cheese one bit. Yum!
I tripled the recipe, can I still use one 13×9 pan.
No, you’ll need 3 pans.
I want to make this for dinner tonight. Would 5 hours in the fridge be long enough?
I think should be fine.
We Loved it! About to make it again. With a side of fruit.
I made this recipe and followed the directions. It turned out amazing. I was wondering if I could substitute the bread for hash browns and hoping this might still work. Any thoughts on that?
Yes, I think that would work!
Would it be okay to make this in a tin 9×13 pan? I want to make it ahead but I will be camping and don’t want to bring my nice Pyrex. Thanks!
Yes that should be fine! Enjoy!
Wonderful! Finally, a breakfast casserole that adds a few more spices besides salt and pepper. I love the fact that there is more color and therefore more nutrition in this dish (thanks to veggies). I used texas toast and I think next time I will cube the bread and blend the ingredients a little more. Layers are good, but sometimes I think it looks to flat. Nice job!
H! Ive made this at least 3 times in one month. It’s a hit with everyone who tries it and they want the recipe.
This time, I only have wheat bread that is a significantly denser than regular white bread. Do you think it will still work? Wondering if it would soak in the egg mixture as well.
I’m really happy to hear that! Yes I think the wheat bread would work fine–the texture of the casserole may be a little thicker but I think it will taste great 🙂
Going to try this today!! I’m hoping that I don’t make ahead to early and it doesn’t turn out! I want to have it prepared by noon then bake it tomorrow morning! Do you think that’s too long for it to sit in fridge?
I think that will be just fine! Enjoy!
Hi! Could I add 2 more eggs or is 6 ideal?
Yes, that would be fine! Add a little extra splash of milk too.
How far in advance can this be made/put together? Can you prep and refrigerate longer than overnight—day a day or so—before baking?
It would probably be fine to make 2 days in advance. Or you can bake it and reheat it.
Glad I came across this recipe made a very similar version years ago and couldn’t find my recipe to make it again for Christmas….this is so versatile…
Writing this in my recipe keeper this time….going to do a ham, broccoli cheddar for new years, a all veggie for my son to take home after Christmas and this for version for us…definitely want to try the one suggestion with chorizo
Super yummy! I tried to put some more bread slices like yours, it became even more hearty!
– Natalie
Wondering about substituting hash browns for the bread. Any comments? Other than that, this sounds absolutely delicious!
I haven’t tried that but I think it would work great 🙂 Enjoy!
Just came across this recipe. Right up my alley! Making right now… unfortunately I don’t have any sausage on hand so using chorizo instead. But thought it would go well with the green chiles. Thanks for your post!
Chelsea
I love this…set it and forget it. This was delicious! Easy prep, little clean up is my kind of breakfast. We will be making again.
Can cooked crispy bacon be added to this recipe? Btw casserole sounds delicious ?
Definitely! That sounds delicious!
I love your recipes!! Currently your lasagna roll ups and chicken tikka masala are on repeat 🙂 This probably only makes sense in my head…but i like your recipes because they taste ‘normal’ and homemade and delicious instead of some of the slightly weird and ‘off’ tasting made up recipes from other blogs/pinterest. Thanks for posting!!
Jessica, thanks so much for your nice comment! I’m so happy you have liked the Chicken Tikka and the Lasagna Rolls–we love them as well! I’m all about sharing ‘normal’ yummy homemade recipes–there’s nothing worse than making something you found online and the taste is off!
Thanks again for your nice comment and for following along 🙂
This looks amazing! You know how we love breakfast over here!
Oregano sounds different than I’m used to in my other breakfast casseroles. Will try SOON.
Thanks for the breakfast idea. I’m always looking for something new to try and this one is it. Pinned.
Thanks Lori! I’m always fun to find tasty new breakfast ideas! Hope you love it!
You can always use waffles cut into cubes as well. It’s like a French toast breakfast, be sure to add maple syrup to the egg mixture ?
So it’s like a savory french toast casserole? Cool!
I haven’t thought of it that way but you’re totally right! Savory french toast 🙂
Ooh I love a good breakfast casserole! Thank you!
This sounds great!! Thanks for sharing!