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This easy Breakfast Casserole recipe is made with eggs, sausage, and cheese and only takes a few minutes to throw together. You can make it ahead of time, so it's the perfect breakfast casserole for Christmas morning or any day!
Try other popular breakfast recipes like perfect Cinnamon Rolls or Monte Cristo Sandwich.
Breakfast Casserole
So, I always thought I had the best breakfast casserole recipe (this overnight breakfast casserole that we make a few times a year). I recently learned I was mistaken, because this breakfast casserole right here really is the BEST!
And, although I still really love the other recipe, this one is more of a traditional breakfast casserole, with tons of eggs, and it's fantastic! Plus, you can still make it the night before so it's perfect for holidays and special events where you don't have a lot of time to prepare in the morning.
I adapted this recipe from my sister Jessica over at Pretty Providence. I added a couple extra eggs, some milk, left out the mushrooms and cut the amount of bell peppers in half. The great thing about this recipe is how adaptable it is! It's delicious with other types of cheese like pepperjack or Swiss, or you could try adding more veggies, like spinach or zucchini.
How to make easy breakfast casserole:
The main ingredients for this egg casserole are really simple and include: eggs, sausage, bell peppers, onion, and cheese. We add sour cream and milk to the egg mixture to make it creamy, light and fluffy.
To make the casserole combine the eggs, sour cream, milk, cheese, and salt and pepper in a large bowl.
Next, cook the sausage, breaking it into small bits as it's browning. Set it aside and then saute the bell peppers and onions in the same pan. Add everything to the egg mixture and stir to combine. Pour it into a 9×13” pan and bake for 35-50 minutes or until the edges are set and the center is a little jiggly in the center. It will continue to cook and set up as it cools.
After baking, leftover egg casserole can be stored in the fridge and enjoyed within 3-4 days. Leftovers are delicious reheated in the microwave.
Can I make this breakfast casserole ahead of time?
Yes, you can make this breakfast casserole a day ahead, or freeze it to bake another day!
To make one day ahead of time, prepare everything as directed, up until baking. Cover the casserole and store it (unbaked) in the refrigerator overnight or up to one day. Bake in the morning, according to recipe instructions.
To freeze breakfast casserole prepare the recipe and add to your pan. Cover well with plastic wrap and then tinfoil and freeze for 2-3 months. Allow it to thaw overnight in the refrigerator, and then let it come to room temperature before baking according to recipe instructions.
Consider trying these popular brunch recipes:
- Cinnamon Roll Cake with Cream Cheese Frosting
- Apple Coffee Cake
- Peach Scones
- Poppy Seed Cake
- Broccoli Cheese Quiche
- Sour Cream Coffee Cake
- Lemon Zucchini Bread
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Recipe
Breakfast Casserole
Equipment
- Vegetable Chopper , optional
Ingredients
- 2 pounds pork sausage
- 12 eggs
- 1 cup sour cream (light or regular) (240 g)
- 1/4 cup milk (60 ml)
- 1 teaspoon kosher salt
- 1/2 teaspoon ground black pepper
- 4 green onions
- 1/2 green bell pepper , diced
- 1/2 red bell pepper , diced
- 2 cups shredded cheddar cheese (200 g)
Instructions
- Preheat oven to 350 degrees. Spray a 9x13’’ pan with cooking spray.
- Combine the eggs, sour cream, milk, cheese and salt and pepper in a large bowl. Mix on low speed with electric mixers, just until combined.
- Heat a large skillet over medium heat. Add sausage and cook until browned, breaking it into small pieces with a wooden spoon as it cooks. Drain most of the grease and add the sausage to the bowl with the egg mixture.
- Add the bell peppers and onion to the same skillet the sausage was cooked in and sauté for 2- 3 minutes. Add to the bowl with the eggs and stir everything to combine.
- Pour mixture into greased 9x13’’ pan and bake for 35-50 minutes or until the edges are set and the center is just barely jiggly.
- Leftover egg casserole can be stored in the fridge and enjoyed within 3-4 days. Leftovers are delicious reheated in the microwave.
Notes
Nutrition
Have you tried this recipe?!
RATE and COMMENT below! I would love to hear your experience.
This casserole is a hit every single time I make it! It’s perfect for preparing ahead when hosting friends and family, and it’s equally satisfying as a grab-and-go option during the work week. Bravo, Lauren Allen!
Can you make it the night before?
I made it the night before and cooked it in the morning. It came out fantastic!
Yes. I did and reheated it, covered, in a 300° oven for about 30 minutes. It was perfect.
When you bake it the first time, check it at 30 minutes. 55 minutes is too long.
Yes! I do it all the time. I use those huge yellow Tupperware plastic bowls and because they seal so well, I’m able to mix the ingredients before pouring it into the pan by shaking the bowl & turning it upside Down.
Read the instructions prior to the recipe
As a grab and go option, do you prepare it in one pan or individual servings such as a muffin tin? I am wanting to prepare ahead, freeze, and bake on busy school mornings. I love this casserole when entertaining guests and it is always a hit!
I’ve only baked it in a pan but I think it would be perfect as muffins. Just reduce the bake time?
This is my favorite breakfast casserole recipe! Easy to follow and delicious.
I make this breakfast casserole every time we have a family gathering. It’s a big hit with everyone. I make this breakfast casserole every time we have a family gathering. It’s a big hit with everyone. So glad I found it. Thank you so much for publishing it.
But do you make this every time you have a family gathering?
😂😂
Recipe sounds awesome. I have to use plant based for the sour cream and cheese could. It find the sour cream so I gggled and was told to use unsweetened yogurt including dairy free. Do I use the same amount as I would for sour cream
Thank you! Yes, you can use the same amount of unsweetened dairy free yogurt in place of the sour cream.
Can I make this two days in advance?
Yes, you can make it up to two days in advance. Just cover it well and refrigerate, then bake when ready.
Can you half the recipe and cook in a smaller dish?
Yes, absolutely! You can halve the recipe and bake it in a smaller dish. Just keep an eye on it since it may cook a little faster.
Is it possible to put a pie crust underneath to make it like a quiche?
Ive never tried this personally but it could work! If you make it, let me know how it turns out!
Hi! If today is Friday and I want to have it for Thursday morning. Can I prep it today and freeze it unbaked to bake that morning? Thaw in the fridge the day before? Or do I bake it and then freeze?
Thank you!!
Perfect timing! Prep it today (Friday) unbaked, cover it well with plastic wrap and foil, then freeze. Move it to the fridge Wednesday to thaw overnight. Let it come to room temperature Thursday morning before baking according to the recipe instructions. This way you’ll have a fresh-baked casserole Thursday morning without any stress!
I love this recipe and make it every Christmas, but was wondering, have you ever tried making it in a crock pot?
So glad you love it! I haven’t personally tried it in a crock pot, but I think it could work! You’d want to spray the crock pot well, cook on LOW for about 3-4 hours, checking after 3. The edges should be set and the center just slightly jiggly. It might not get those nice crispy edges like the oven version, but it should still be delicious! Let me know if you try it! 😊
Can I put hash browns on the bottom?
We have a recipe for that here
I see info on freezing prior to baking.. Can I bake it all and THEN freeze it once it’s already baked? How would I reheat that? Quick zap in the microwave? Wanting something quick in the mornings for my 2 littles. Thanks!
Yes! You can definitely bake it first, then freeze it. Just let it cool completely, then slice it up and freeze the portions. In the morning, microwave a piece straight from the freezer or let it thaw overnight in the fridge for quicker reheating. Super handy for busy mornings with littles
Can you use Italian sausage?
Yes! Italian sausage will work great just know it’ll have a different flavor profile (more herbs like fennel and basil instead of breakfast sausage spices). Use mild or hot depending on your preference. Still delicious!