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Easy Sausage, Spinach and Cheddar Breakfast Casserole is a cozy and perfect dish to serve a hungry breakfast crowd.

easy sausage breakfast casserole

This past weekend, we had an awesome time with some overnight guests. My sister and her husband were in town. They joined us at the beach for a fun couple of days of eating, drinking, and socializing.

I like to make a hearty breakfast for out-of-town guests. I whipped up my Easy Sausage, Spinach, and Cheddar Breakfast Casserole early on Saturday morning. Along with crumb topped blueberry muffins, breakfast was a hit. I love, love, love this casserole! It is so versatile. Adapt it to use whatever breakfast meats, veggies, and cheese you have hand.

the ingredients

The base of the breakfast casserole is the same. Change up the “filling” ingredients with your favorites. This combo of ingredients is my go~to for an easy sausage breakfast casserole.

salted butter
breakfast sausage
spinach
large eggs
whole milk
Dijon mustard
baking powder
kosher salt
pepper
cheddar cheese

the recipe details

Just some sauteing and mixing is all that is needed for the breakfast casserole. First I sauté the sausage until it has some crispy bits and cooked through. To streamline the prep, stir in the spinach just before the sausage is done cooking.

Next whisk the eggs along with milk, some mustard for a little kick, baking soda, kosher salt and pepper.

Now for the easy part, combine the cooked sausage and spinach with the egg mixture and the shredded cheddar cheese. Pour into a buttered baking dish and cook until just set and puffed up in the middle.

Wasn’t that easy? Let’s eat!

breakfast casserole with sausage and spianch

can you make a breakfast casserole in advance?

Absolutely! That is why I love breakfast casseroles. If you are anything like me, I’m blurry eyed in the morning. But coffee first. I need all the help I can get.

After baking, completely cool, cover with plastic wrap. and store in the refrigerator for up to 3 days. When you would like a serve it, just reheat a piece on 60% power in the microwave for about 1 minute.

Alternately, you can prep the ingredients the day or night before assemble the casserole in the morning. Brown the breakfast sausage, sauté the spinach and grate the cheddar cheese in advance. Store the ingredients in the refrigerator, and they will be ready to go the morning you make the casserole. Just combine all the ingredients and in about 30 minutes breakfast is served.

my cooking videos ~ blueberry bread pudding pancakes

why is my breakfast casserole runny?

It is important to precook the vegetables before adding them along with the other ingredients for a breakfast casserole. Vegetables contain a high percentage of water. When raw veggies cook in the casserole, they release the water and make your breakfast too liquidy. Giving the vegetables a quick sauté will solve this problem.

slice of breakfast casserole with sausage and cheese

try these breakfast casserole variations

The breakfast casserole has a few basic ingredients (which you most likely have on hand) including eggs, milk, Dijon mustard, baking soda, kosher salt and pepper. The recipe is very forgiving. Change up the add-in ingredients to make it include your favorites. Some options include

cooked and crumbled bacon
diced ham
diced Canadian bacon
Swiss, pepper jack or herb goat cheese
steamed broccoli or asparagus
sautéed mushrooms or zucchini
finely diced fresh tomatoes.

egg dish with ham, onion, red pepper, zucchini and cheddar cheese

just one more thing

If you make this easy breakfast casserole recipe, I’d love hearing from you all. Be sure to leave a comment and/or give this recipe a rating ~ I do my best to reply to all your comments. And snap a photo to post to Instagram. I’ll add the photos to my Insta stories as I love seeing all your creations.

more breakfast recipes I love