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 baked in a 9x13'' white pan and cut into twelve servings.

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.

A slice of breakfast casserole on a white plate with a fork.

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.

An overhead photo of the ingredients for breakfast casserole including eggs, red and green bell pepper, green onion, sausage and shredded cheddar cheese.

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.

Overhead process photos of an egg breakfast casserole in a white dish unbaked and then baked.

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.

A spatula removing a slice of breakfast casserole from the pan.

Consider trying these popular brunch recipes:

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Recipe

Breakfast casserole baked in a 9x13'' white pan and cut into twelve servings.
Prep 10 minutes
Cook 55 minutes
Total 1 hour 5 minutes
Save Recipe

Ingredients
  

  • 2 pounds pork sausage
  • 12 eggs
  • 1 cup sour cream (light or regular)
  • 1/4 cup milk
  • 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

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

Adapted from Pretty Providence.
*Directions for freezing or making the casserole ahead of time are above in the post.

Nutrition

Calories: 385kcalCarbohydrates: 2gProtein: 23gFat: 30gSaturated Fat: 12gCholesterol: 239mgSodium: 669mgPotassium: 327mgSugar: 1gVitamin A: 705IUVitamin C: 11.6mgCalcium: 194mgIron: 1.8mg

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Lauren Allen

Welcome! I’m Lauren, a mom of four and lover of good food. Here you’ll find easy recipes and weeknight meal ideas made with real ingredients, with step-by-step photos and videos.

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Robin
2 months ago

5 stars
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!

Michelle
11 months ago

5 stars
This is my favorite breakfast casserole recipe! Easy to follow and delicious.

S. Townsend
1 year ago

5 stars
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.

Aislyn
5 years ago

5 stars
I halfed this recipe and made it for me and my boyfriend’s weekend trip to Savannah. Didn’t want to spend time having to cook breakfast and clean the kitchen while on vacation. This casserole is amazing and so easy! This is a keeper for sure!

Jane
5 years ago
Reply to  Aislyn

How much salt to you add? With all that sausage and cheese, I’m thinking not much would be needed. Maybe 1/2 teaspoon? More? Less? Thanks for the recipe; it looks delicious!

Janet
5 years ago

How much salt and pepper do you recommend? Would it work with ham or just veggies?

Judith
5 years ago

5 stars
This recipe is delicious. I made it on Saturday for a breakfast at church the following day. On Sunday, I warmed it in the oven at 200°. The recipe received rave reviews.

Sharon Patten
5 years ago

What modifications would be needed if I leave out the peppers and onions,or just the peppers?
Thanks!

Jess
6 years ago

Could you substitute greek yogurt for the sour cream?

Faye Harrington
6 years ago

5 stars
Great easy recipe. Great flavor and will be a keeper here at our house. Thanks!!

Sumita Chakraborty
6 years ago

5 stars
Tried a casserole for the very first time. Did make some modifications….added red pepper flakes and Cajun seasoning. It turned out to be a huge hit with the family. I am not a baker by a long shot and I was really impressed with the recipe. Great recipe.

Sandy Deitrick
6 years ago

5 stars
My daughter brought this for Christmas breakfast. It’s one of the best breakfast casseroles I’ve tried, and leftovers are even better.

Lauri
6 years ago

5 stars
I made this over the weekend and it reminder me of a casserole I had when i was a kid and it really is so fast and easy. We’ll be making again soon.

Liz
6 years ago

5 stars
Awesome recipe! I tried this this past weekend (a trial run before Christmas morning) and it’s a definite winner!

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