Overnight Sausage and Egg Breakfast Casserole

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Made with ground sausage, eggs, bread, and lots of cheese, this Overnight Sausage and Egg Breakfast Casserole is the perfect breakfast for holiday mornings or weekend brunch. Easy to prepare & loved by the whole family!

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, my husband would happily have it all year long. 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.

Why You’ll Love This Overnight Breakfast Casserole

• Perfect for the holidays. I’ve been having this overnight sausage and egg breakfast casserole 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!
• Minimal work in the morning. After the ingredients are assembled, the whole casserole is covered and stored in the fridge overnight. Baking it the next morning couldn’t be easier!
• Savory breakfast flavors. This overnight breakfast casserole is made with bread, sausage, cheese, and eggs. It’s definitely a hearty and savory dish!

What You’ll Need

One of the best things about this overnight breakfast casserole recipe is that you only need a few ingredients. You can find the exact measurements needed in the recipe card below.

• Bread – See notes below.
• Sausage – Any breakfast sausage will work here. I use a Jimmy Dean log. Brown and drain before assembling the casserole.
• Cheddar cheese – Freshly shredded cheese melts the best.
• Eggs – Be sure to use large eggs, not medium or extra large.
• Milk – 2% or whole milk will give you the best texture in the casserole.
• Spices – Dry mustard, salt, and pepper. You don’t need a lot, but the flavor will be lacking without them.

What Type of Bread Should I Use?

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, like a white bread.

Tips & Variations

• Adjust the baking time. The exact amount of time your casserole needs to bake will depend on how runny or soft you want the eggs. If you prefer them runny, you may want to bake for a little less time. You can check by using a fork or knife in the center to see how soft it is.
• Try other meat. Bacon or ham would work in place of the sausage (or even in addition to the sausage).
• Add some veggies. Try adding diced onion or bell peppers to the casserole. You can cook them with the sausage. Mushrooms would also be a good addition.
• Cover with foil. To prevent the breakfast casserole from browning too quickly in the oven, cover the pan with foil for the first 30 minutes or so.

Serving Suggestions

While this casserole is perfect by itself, we often serve it with something sweet. Overnight French Toast Casserole is amazing (and I have an apple, pumpkin and cake batter version, too). You could also try some apple fritters or blueberry muffins!

Proper Storage

• Fridge. Store leftover sausage and egg breakfast casserole in the fridge for up to 3 days. Keep it covered tightly with plastic wrap or foil or transfer to an airtight container.
• Reheat. The entire baking dish can be reheated in the oven, covered with foil, until heated through. Individual servings can be reheated in the microwave.

More Easy Breakfast Recipes

• Hashbrown Breakfast Casserole
• Sheet Pan Pancakes
• Easy Fluffy Homemade Waffles
• Berry French Toast Casserole
• Baked Apple Cinnamon Oatmeal

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Enjoy!