Mornings can be hectic, and nothing is better than a quick and easy breakfast. This easy sausage breakfast casserole recipe makes the perfect cheesy breakfast to satisfy a crowd. Fluffy eggs baked with potatoes, Italian sausage, and an array of delicious vegetables, all oven-baked to perfection! It is almost as easy as our breakfast skillet recipe but just as delicious! 

Eggs are a breakfast staple; you can enjoy them in many ways. An easy egg frittata or a loaded bacon omelet are significant variations, but this easy breakfast casserole recipe is still one of our favorites. 

Easiest sausage breakfast casserole recipe in a baking dish topped with greens.

This hearty breakfast casserole is full of incredible flavors. From the Italian sausage to the tender vegetables, all surrounded by fluffy eggs. You will love how easily this breakfast bake comes together, and your family will surely enjoy this start to the day. 

Why You’ll Love This Recipe

  • Customizable. Personalize this casserole to fit your taste.
  • Hands-off cooking. Most of this recipe consists of baking the casserole in the oven, meaning you have plenty of time to focus on other tasks. 
  • Feeds a crowd. Like most casseroles, this breakfast version will provide a large group of people, making breakfast for a crowd much more manageable. 
A slice of breakfast casserole on a wooden spoon topped with avocado slices and tomatoes with greens.

Ingredients for this Sausage Breakfast Casserole: 

The ingredients for this breakfast casserole are simple and make this easy casserole so delicious. 

  • Potatoes – cubed yukon gold, russet, idaho or red potatoes will all work. 
  • Italian sausage – a mild sausage full of flavor and a hint of spice. The same sausage we used in our easy breakfast tacos.
  • Veggies – a mix of diced onion, red and green peppers, and mushrooms. 
  • Eggs – are the main ingredient for this casserole. 
  • Half and Half – a creamy component that makes the casserole extra fluffy.
  • Cheese – shredded cheddar cheese makes this casserole cheesy and gives the top a great texture. You can also use freshly shredded mozzarella cheese.

See the recipe card below for a complete list of ingredients and quantities.

Picking the Right Pan:

Use a deep baking dish or a casserole dish for perfect cooking. A 9-inch x 13-inch dish will work or an oval one.

The best breakfast casserole with sausage and vegetables in a casserole dish.

Substitutions and Variations

  • Protein – You can swap out the Italian sausage for bacon or ham and get an incredible breakfast. The flavors will be similar to our bacon mushroom omelet
  • Veggies – Swap out the veggies for more of your favorite ones; zucchini, broccoli, bell peppers, and tomatoes are great options for making this hearty casserole. 
  • Spice – Take the spice level up by adding diced jalapenos or spicy sausage. 

How to Make a Sausage Breakfast Casserole:

Step-by-step instructions for making a family-style breakfast casserole.

Sausage being browned in a skillet.

1 – Potatoes:  Boil cubed potatoes for 5 minutes, then drain and set aside to cool. 

Sausage: brown sausage in a hot skillet over medium-high heat, breaking it up as it cooks. Remove sausage and set aside.

Chopped vegetables are added to the skillet and being cooked.

2 – Veggies:  Add oil, onions, peppers, and mushrooms in the same skillet. Saute vegetables until they are tender, then proceed to add in minced garlic. 

A large bowl with whisked eggs, sausage, and vegetables.

3 – Eggs:  Whisk eggs with half and half in a bowl and season with salt & pepper. In a large bowl, combine all the ingredients with the egg mixture and stir in shredded cheese.

A casserole dish with the egg, vegetable mixture, topped with shredded cheese.

4 – Bake: Transfer to a baking dish, top with remaining cheese, and cover with foil. Bake at 375°F for 30 minutes. Then, remove the foil and bake for 10-15 more minutes. 

Expert Tip for Make Ahead Casserole

For a leisurely breakfast, you can make this casserole the night before. Prepare the casserole as you would, but don’t bake. Set in the fridge and bake as you would in the morning. 

Breakfast casserole in a baking dish with a wooden spoon.

Serving Suggestions

>Pair with something sweet: This casserole makes a great brunch, followed by homemade lemon blueberry pancakes

>Bagel: Bake your own homemade everything bagels and enjoy with the casserole. 

>Classic breakfast: Pair this egg casserole with air-fryer bacon and homemade shredded hash browns

Recipe FAQs

Can I skip out on half and half?

You can use milk instead of half and half or opt out of it. 

Why do you need to precook the vegetables? 

If you add the raw vegetables to bake in the casserole, they may not cook all the way, and they will release excess moisture into the dish. 

Why does the casserole need to be foiled? 

The foil helps the casserole cook thoroughly before getting burnt on the top. 

Do I peel the potatoes?

Peel the potatoes before cubing or leave the skins on; clean the skin thoroughly.

Store & Reheat 

  • Storage. You can store the leftover casserole in the fridge for up to 3 days. 
  • Reheat. Warm up the leftovers in the oven at low heat or on a skillet. 
  • Freeze. This casserole is great to freeze for a leisurely breakfast. You’ll want to bake the casserole in a freezer-safe baking dish, then cover and freeze. Store for up to 3 months. Reheat: Thaw in the fridge overnight and then bake in the oven at 350°F until warm. 

More Breakfast Recipes

If you tried this Sausage Breakfast Casserole Recipe or any other recipe on my website, please leave a star rating and let me know how it went in the comments below – we appreciate it!

Potato Sausage Breakfast Casserole Recipe

Author: Valentina
5 from 3 votes
This sausage breakfast casserole recipe is easy to follow and makes an incredible breakfast. Italian sausage, potatoes, and vegetables, all baked to perfection with fluffy eggs. This casserole is made to feed a crowd and will give you a great start to your day.
Prep Time: 10 minutes
Cook Time: 45 minutes
Total Time: 55 minutes
Servings: 6 servings


  • 1 lb potatoes cubed
  • 1 lb Italian sausage mild
  • 1 tsp oil
  • 1/2 large onion finely chopped
  • 6 oz mushrooms cubed
  • 1/2 red pepper cubed
  • 1/2 green pepper cubed
  • 2 garlic cloves minced
  • 7 large eggs
  • 1/3 cup half and half
  • 2 cups shredded cheese divided
  • ½ tsp salt
  • ¼ tsp ground black pepper


  • Boil cubed potatoes for 5 minutes. Drain and set potatoes aside to cool.
  • Heat a skillet and brown the sausage, breaking it up as it cooks. Proceed to set cooked sausage aside.
  • Add oil, onion, mushrooms, and peppers into the same skillet. Saute the vegetables until they are tender. Add garlic and saute until the garlic is fragrant.
  • Whisk together eggs, half and half, and seasoning in a bowl.
  • Combine vegetables, sausage, and eggs in a large bowl. Stir in 1 cup of shredded cheese.
  • Transfer the mixture to a baking dish, finish with cheese, and cover with foil. Bake at 375°F for 30 minutes. Then, remove the foil and bake for 10-15 more minutes.


  • Store leftovers in the fridge for up to 3 days.
  • You can prepare this casserole the night before for a simple breakfast the following morning. Pour mixture into a baking dish, cover, and store in the fridge. The following day, bake as usual. 
  • You can personalize this casserole by adding bacon and various vegetables.


487kcal Calories5g Carbs27g Protein39g Fat16g Saturated Fat5g Polyunsaturated Fat16g Monounsaturated Fat0.02g Trans Fat283mg Cholesterol1064mg Sodium455mg Potassium1g Fiber3g Sugar925IU Vitamin A24mg Vitamin C252mg Calcium2mg Iron
Nutrition Facts
Potato Sausage Breakfast Casserole Recipe
Amount Per Serving
Calories 487 Calories from Fat 351
% Daily Value*
Fat 39g60%
Saturated Fat 16g100%
Trans Fat 0.02g
Polyunsaturated Fat 5g
Monounsaturated Fat 16g
Cholesterol 283mg94%
Sodium 1064mg46%
Potassium 455mg13%
Carbohydrates 5g2%
Fiber 1g4%
Sugar 3g3%
Protein 27g54%
Vitamin A 925IU19%
Vitamin C 24mg29%
Calcium 252mg25%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.
(The nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)