Slow Cooker Breakfast Casserole


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Slow Cooker Breakfast Casserole takes classic ingredients like shredded hashbrowns, cooked sausage, and shredded cheddar cheese with an egg mixture to make a meal your whole family is sure to enjoy. Grab your slow cooker and let’s get cooking!

If you’re looking to add a few more crockpot breakfasts to your meal plan, you should try my Slow Cooker Breakfast Burritos, Slow-Cooker Baked Apples, and Slow Cooker Cinnamon Roll Casserole.

overhead shot of slow cooker breakfast casserole.
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Why You Should Try This Slow Cooker Breakfast Casserole

With this crockpot breakfast casserole recipe, you can save oven space and combine everything in one pot. It will cook while you finish other things and be ready in a few hours.

Whether you’re looking for something to take along to a potluck or something to make for easy weeknight meals, this casserole dish is one to try. You will also like my slow cooker apple butter recipe!

Recipe Ingredients

ingredients for slow cooker breakfast casserole on a table.
  • Frozen Hashbrowns: You don’t have to let these defrost first. They can be added to the slow cooker straight from the bag.
  • Breakfast Sausage: I personally like to use Jimmy Dean or Smithfield, but you can use any brand (and flavor) of your choice.
  • Egg Mixture: This is made by mixing a full carton of large eggs, milk, and seasonings.
  • Onion: Diced and added for a hearty and flavorful touch.
  • Seasonings: Salt, black pepper, garlic powder, and onion powder.
  • Cheddar Cheese: Save time by using a bag of shredded sharp cheddar cheese or purchase a block and shred it yourself, I recommend this for the best melting finish. (Find the full recipe in the recipe card below the photos).

Step-by-Step Directions

four images showing how to make slow cooker breakfast casserole.

Step One – Cook the sausage in a skillet on the stove top and drain grease.

Step Two – Add the frozen hash browns, diced onions, and sausage to the slow cooker and stir together (or use clean hands to toss them together).

Step Three – In a large bowl add the eggs, milk and seasonings. Whisk together.

Step Four – Pour egg mixture evenly over the hashbrowns and sausage.

three images showing how to make slow cooker breakfast casserole.

Step Five – Sprinkle over the cheese.

Step Six – Place the lid on the slow cooker. Cook on HIGH for 3.5 hours or on LOW for 6 hours.

Step Seven – Garnish with green onions, serve, and enjoy!

overhead shot of breakfast casserole in a slow cooker.

How to Serve

  • This delicious breakfast casserole can be served as is for a quick bite to eat.
  • It can also be served with a variety of toppings such as fresh salsa, ketchup, hot sauce, sliced cherry tomatoes, chopped green onions, and sour cream.
  • As for side pairings, fresh fruit (think strawberries or sliced oranges) or pancakes are great choices.
serving of slow cooker breakfast casserole on a stack of plates.

Recipe FAQs

Are there any variations or substitutions I can try?

Yes! You can use diced ham, turkey sausage, and diced hashbrown potatoes. Adding bell peppers (both red and green peppers) is a nice addition as well. As for cheese, mozzarella cheese is a good one to add on top and for serving.

Do I need to prep the slow cooker first?

Nonstick cooking spray isn’t necessary; however, it never hurts to use it. You can also use a slow cooker liner.

How do I store leftovers?

This breakfast casserole recipe keeps well in an airtight container and when stored in the fridge. It will last up to 4 days and can also be frozen. Let it defrost completely before reheating in the oven or microwave.

close-up shot of slow cooker breakfast casserole on a stack of plates.

More Slow Cooker Breakfast Recipes

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overhead shot of breakfast casserole in a slow cooker.

Slow Cooker Breakfast Casserole

Prep Time: 10 minutes
Total Time: 6 hours 10 minutes
Servings: 8
Using a few classic breakfast ingredients, this Slow Cooker Breakfast Casserole is perfect for busy weekends.

Ingredients 
 

  • 30 oz. frozen hashbrowns
  • 1 lb. breakfast sausage, such as jimmy deam or smithfield
  • 1 white onion, diced
  • 12 large eggs
  • 1 cup milk
  • 1 tsp. salt
  • ¼ tsp. pepper
  • ½ tsp. garlic powder
  • ½ tsp. onion powder
  • 8 oz. bag shredded sharp cheddar cheese

Instructions 

  • Cook the sausage in a skillet on the stove top and drain greese.
  • Add the frozen hashbrowns, diced onions, and sausage to the slow cooker and stir together (or use clean hands to toss them together).
  • In a large bowl add the eggs, milk and seasonings. Whisk together.
  • Pour the egg mixture evenly over the hashbrowns and sausage.
  • Sprinkle over the cheese.
  • Place the lid on the slow cooker. Cook on HIGH for 3.5 hours or on LOW for 6 hours. The cooking time will vary from slow cooker to slow cooker. Check at the end of cooking to see if you breakfast casserole needs more time.
    Scoop into bowls, and sprinkle with green onions for garnish.

How to Video

Sarah’s Notes

  • Keep the lid on the entire cooking time for best results.
  • This breakfast casserole recipe keeps well in an airtight container and when stored in the fridge. It will last up to 4 days and can also be frozen. Let it defrost completely before reheating in the oven or microwave.
  • You can add other vegetables such as bell pepper, broccoli or mushrooms.
  • Swap out the meat for ham or bacon!

Nutrition

Calories: 495kcal | Carbohydrates: 23g | Protein: 27g | Fat: 33g | Saturated Fat: 13g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 11g | Trans Fat: 0.1g | Cholesterol: 318mg | Sodium: 966mg | Potassium: 627mg | Fiber: 2g | Sugar: 2g | Vitamin A: 733IU | Vitamin C: 10mg | Calcium: 295mg | Iron: 3mg

Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.

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15 Comments

  1. Kelly says:

    Have you ever doubled this recipe? If so, how long was the cooking time?

    1. Sarah Olson says:

      I have not doubled it, it wouldn’t fit if doubled. Also, when egg type dished are doubled, it’s hard to get the center to finish before the edges burn.

  2. Joann says:

    Hi, what ido you think cooking time would be if I halved the recipe?
    Thanks

    1. Sarah Olson says:

      I’m guessing about 4 hours on low. It’s hard to say without testing.

      1. Anonymous says:

        Thank you!

  3. Stacey Horning says:

    Have you ever attempted the recipe with less eggs? My diva (9 y/o) doesnโ€™t like eggs but I love the protein they addโ€ฆso would love to see this less eggy for her but not sure if itโ€™s even possible?

    1. Sarah Olson says:

      I have not tested with less eggs, it may be too dry.

    2. Anne Marsaw says:

      You cld mix in some other cheese like ricotta or cottage cheese and maybe some xtra half and half but not enough to make it too soupy

  4. Joann says:

    Would the cooking time change if I made 4 servings (half the recipe)?
    Thanks, Joann

    1. Sarah Olson says:

      I have not tested a half recipe, but yes, the cooking time would be less.

  5. Suzi says:

    Can this be prepared the night before, leave the insert in the fridge, and then and then start it early in the morning?

    1. Kimberly says:

      I was looking for the answer to the same question!

      1. Sarah Olson says:

        You can, though you run the risk of the slow cooker cracking when it’s put on the heat. I have never had this happened, but have heard of it.

  6. Frances Waters says:

    Hi. Can you tell me the name of the slow cooker u use. I love your recipes

    1. Sarah Olson says:

      This is a crockpot brand from target.