Overnight Sausage & Egg Breakfast Casserole for the Holidays (2024)

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This Overnight Sausage and Egg Breakfast Casserole is a classic breakfast in our house! I’ve been having it on holiday mornings since I was a kid and have carried the tradition into adulthood. It’s a wonderfully easy breakfast to share as a family on busy holiday mornings!

An Easy Overnight Breakfast Casserole

Every Christmas for as long as I can remember, we’ve had this breakfast casserole for breakfast. We also tend to have it for Thanksgiving, Easter and any day it seems appropriate. Shoot, the hubs would happily have it all year long.

Of course since Christmas is also my birthday, I have added my own little tradition to the mix. Not only do we have this breakfast casserole for the savory lovers, but we also have this Cake Batter French Toast Casserole – and yes, I eat it with the frosting warmed up and poured all over it. 🙂 Oh my gosh, I’m drooling just thinking about having it again a week from today. Now if you head over and check out that casserole – and I hope you do – you’ll have to excuse the bad old photos. If you want to see where I started as far as photography, check that out. 🙂 Also, there’s a pretty long and hilarious story that we still talk about to this day. Good times.

But back to the savory casserole! This is the one that makes you feel a little healthier and like it’s ok to indulge in the birthday one. Even if you aren’t celebrating my birthday on Christmas, there’s Jesus’ birthday too. 😉

How to Make this Breakfast Casserole Recipe

Anywho, this casserole is maybe the easiest thing ever to put together. There are so many versions out there, but this is the one I use and love. It’s wonderful to wake up in the morning and have it ready to go straight into the oven. On Christmas, we often pop it the oven, then open some presents while it bakes.

To get started making it, there’s some bread. I don’t use fresh bread from the bakery in this one, like I would a french toast casserole, because I don’t want anything too firm or crunchy. I want the eggs and sausage to shine in here. I tend to use a regular loaf of bread, often of the sourdough variety because I love it. But really any should work just fine.

Sausage and cheese are sprinkled over the bread and let’s be honest, you can’t go wrong with either of those. A full pound of sausage and two cups of cheese should be plenty, but if you feel the need for more you go for it!

Then we’ve got eggs, milk, and some dry mustard, salt and pepper for flavor. The whole casserole is covered and stored in the fridge overnight. Baking it the next morning couldn’t be easier!

You may need to bake it for a little more or less time depending on your oven and how soft or “runny” you prefer the casserole to be. I don’t really like it to be runny, but I also don’t want it to dry out. To check it, use a fork or knife to stick in the middle and see how soft it still is. When it’s done, you’ll definitely be rewarded!

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Enjoy!