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The Ultimate Overnight Slow Cooker Breakfast Casserole

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The holidays are busy, but this overnight slow cooker breakfast casserole is the best way to make your holiday easy.  From prep to clean up, this meal is the perfect way to allow a little breath and time to enjoy your family.

Overnight Slow Cooker Breakfast Casserole

Overnight Slow Cooker Breakfast Casserole

I don’t know about you, but when the holidays start, it is pretty much non-stop, so by the time Christmas hits, I am beat and the last thing I want to do is cook a huge breakfast and clean that up.  So I present you with the absolutely best slow cooker breakfast casserole that will change your holiday mornings!

savory overnight breakfast casserole

Recipe Walkthrough

Check the ingredients below and follow along as we get this slow cooker breakfast casserole made.  I always prep this right before I go to bed on Christmas Eve.  First you brown the breakfast sausage.  You could just put it in the slow cooker raw if you want, but I prefer to brown it before layering it in.

savory breakfast casserole

Next you are going to take 1/2 the bag of frozen shredded potatoes and place them on the bottom.  These will stick and you can see that I am using a slow cooker liner because again, I don’t want to clean.  I have found that if I use a butter cooking spray, the potatoes do not stick as much.

Prepping a breakfast casserole.

Next layer on a heaping amount of delicious shredded cheese. I just buy the already shredded cheese but if you want to go through the motion, you can shred your own potatoes and cheese.

layered breakfast casserole

Place about 1/2 the browned ground breakfast sausage atop the cheese.  I do try to spread this pretty evenly. Again, you could put this in raw and just spread it by hand to get it pretty even, but that is just a preference.

slow cooker liners

Complete that series of layering one more time.  Potatoes, sausage and then cheese.  I do typically do the second layer of cheese on top, but you can easily put it under the sausage.  From there, season your casserole with garlic salt.

easy breakfast casserole

Then beat together eggs and milk and poor that over the layers of potatoes, sausage and cheese. Once done, place the lid on, set it on low and cook for 8 hours.  You will wake up to a wonderfully easy and delicious overnight slow cooker breakfast casserole with super easy clean up and a relaxing holiday morning!

overnight breakfast casserole

Grab the Recipe

4 from 5 votes

Overnight Slow Cooker Breakfast Casserole

This is the best slow cooker breakfast casserole that will make your life so easy, from prep to clean up, your family will thank you!

Prep Time 10 minutes
Cook Time 8 hours
Servings 10


  • 1 roll Breakfast Sausage
  • 1 30 oz bag Frozen shredded potatoes
  • 1 32 oz Shredded colby jack cheese
  • 8-12 eggs beaten
  • 2-4 Cups milk (I live at altitude so more works, but many are going less)
  • 1 tbsp garlic salt


  1. Brown the ground breakfast sausage

  2. Layer 1/2 the bag of potatoes on the bottom of the slow cooker (pro-tip, use a slow cooker liner for easy clean up)

  3. Cover the potatoes in shredded cheese

  4. Layer 1/2 the ground sausage atop the cheese and potatoes

  5. Do another layer of potatoes, sausage and cheese

  6. Season with garlic salt

  7. Beat the eggs and milk together and pour over the mixture

  8. Cook on low for 8 hours and enjoy a wonderful morning meal!

Slow cooker breakfast casserole

If you like this overnight slow cooker breakfast casserole check out this recipe.

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Recipe Rating

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Saturday 11th of March 2023

Made this last night for brunch today. I used bacon instead of sausage (I didn’t have sausage) I also added sautéed red peppers and onions. I only used half the cheese and it was delicious! Thanks for a great recipe


Monday 13th of March 2023

Yay! I love those additions too!


Sunday 25th of December 2022

Definitely way too much milk- It was so runny. I ended up putting this into a casserole dish and baking but it was just too runny and couldn’t eat it.


Tuesday 10th of January 2023

I do apologize. I live at altitude and have always so I assume that is probably why. I updated the directions based on this feedback and appreciate your feedback.


Saturday 17th of December 2022

What size slow cooker is used for the ingredient measurements listed? I have a round one that looks smaller than the one pictured. Thanks!


Monday 19th of December 2022

Hi Tracy, I believe this is a 7 qt but it might be an 8qt.

Thanks Laura

Mike Patterson

Tuesday 6th of December 2022

Have you tried bacon in this recipe?


Wednesday 7th of December 2022

I have not but I bet it would taste great.


Monday 5th of December 2022

I love this idea but we are a small family. 2 adults 2 younger kids. What is your suggestion on making this smaller and still having it cook overnight? I was thinking smaller crockpot and half?? But scared it will burn up


Tuesday 6th of December 2022

You could probably cut everything in 1/2 including the cook time. I love the leftovers so for us making an entire batch makes sense.

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