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Overnight Croissant Breakfast Casserole


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This Overnight Croissant Breakfast Casserole is always a hit! You just prep it the night before and pop it in the oven in the morning. Your family or guests will wake up to the mouthwatering aroma of this hearty breakfast dish.

a breakfast casserole in a white dish on a wood table with a fork and flower cloth in the background with title text reading Overnight Croissant Breakfast Casserole

This Overnight Croissant Breakfast Casserole is a combination of all the things my family loves. My husband loves sausage, my sons love bacon, my oldest daughter loves croissants, and my youngest daughter is a cheese fanatic.

I love meals my family will eat joyfully and if I can make it in advance, that’s an added bonus. I can prep this dish before bed, put it in the oven in the morning when I wake up.

Then, while we get ready, the oven does the rest of the work and a hearty breakfast is ready for us before we move on with the rest of our day!

a breakfast casserole in a white dish on a wood table with a fork and flower cloth in the background

How to Make Overnight Croissant Breakfast Casserole

Normally, I try not to use a lot of different pots and pans or create recipes with multiple steps. This Overnight Croissant Breakfast Casserole is an exception, but I still love it because I can do the prep when it’s convenient for me and the flavor is so worth the effort! Here’s how to make it:

Step 1: Make Bacon

First, you’ll need to cook up a pound of crispy bacon. You can do this on a griddle or in a skillet over medium-low heat. You can also bake your bacon in the oven (400 degrees for 18-20 minutes).

bacon cooking in a skillet

After the bacon has cooled, crumble it into small bits.

Step 2: Cook the Sausage

Next, you’ll brown a pound of pork breakfast sausage in a skillet over medium-high heat.

sausage cooking in a skillet with a wooden spoon

Drain the fat from the skillet and add the crumbled bacon.

a hand pouring crumbled bacon from a small bowl into the skillet of sausage with a wooden spoon in it

 

Step 3: Layer Casserole Ingredients

For the croissants, I like to buy the day-old ones from the bakery. They don’t have to be fresh since they’ll soak up the other ingredients so this is an easy way to save money.

Next, break the croissants into small pieces and press them into the bottom of a greased 9×13 baking dish.

pieces of croissants in a glass baking dish on a white table

Sprinkle the meat mixture over the croissants.

meat mixture from a metal bowl being poured into a dish of pieces of croissants

Step 4: Prepare Wet Ingredients

Now it’s time to combine all of our wet ingredients — eggs, milk, and cream. We’ll also mix in some seasoning. I use salt, pepper, sage, ground mustard, and garlic powder.

Whisk together until well combined. Then, pour over the croissant and meat.

sauce being poured from a bowl into a glass baking dish of sausage, bacon and croissants

That’s it for now! Cover the dish with foil and put it in the refrigerator overnight. Sitting will give the croissant plenty of time to absorb the wet ingredients and the delicious flavor of the bacon and sausage.

The Next Morning…

In the morning, preheat the oven to 350 degrees. Get the dish out of the refrigerator and remove the foil cover. Sprinkle the casserole with parmesan cheese, then top with shredded cheddar cheese (I used white cheddar).

croissants, sausage, bacon and sauce topped with shredded cheese in a glass baking dish on a white table

Bake at 350 degrees for 45-55 minutes. You’ll know it’s done when it’s “set” — it doesn’t jiggle and there’s no visible liquid. It should look like this:

baked sausage croissant breakfast casserole in a glass baking dish on a white table

Your Overnight Croissant Breakfast Casserole is ready to serve! It should slice easily into squares/rectangles like lasagna.

a close up view of a breakfast casserole in a white dish on a wood table with a fork and flower cloth in the background

Overnight Croissant Breakfast Casserole Recipe

I’ve included the step-by-step photos above for my readers who like to know what the dish looks like throughout the prep process. Personally, I prefer to print out the recipe.

So, for those of you who are like me and just want the recipe card, here it is:

Overnight Croissant Breakfast Casserole

This casserole is full of your favorite breakfast foods!
No ratings yet
Prep Time 8 hrs 15 mins
Cook Time 55 mins
Total Time 9 hrs 10 mins
Course Breakfast
Cuisine American
Servings 8
Calories 1010 kcal

Ingredients
  

  • 1 lb Bacon
  • 1 lb Pork breakfast sausage
  • 8 Croissants
  • 5 large Eggs
  • 2 3/4 cup Milk
  • 1 cup Heavy cream
  • 1 tsp Salt
  • 1/2 tsp Pepper
  • 1/2 tsp Garlic powder
  • 1/2 tsp Dry mustard
  • 1/2 tsp Ground sage
  • 1 cup Parmesan cheese
  • 8 oz Shredded cheddar cheese

Instructions
 

  • Cook 1 pound of bacon until it is crispy. Set it aside until it cools, then crumble it into pieces.
  • Brown 1 pound of pork breakfast sausage over medium-high heat, drain fat. Add the crumbled bacon to the skillet.
  • Tear croissants into bite-sized pieces and press them into the bottom of a greased 9x13 baking dish.
  • Pour the meat mixture over the top of the croissants.
  • In a large mixing bowl, combine eggs, milk, and heavy cream. Add salt, pepper, garlic powder, mustard, and sage. Whisk to combine well.
  • Pour the liquid mixture over top of the meat and croissants in the baking dish.
  • Cover the dish with tin foil, and place it in the fridge to sit overnight.
  • In the morning, preheat the oven to 350 degrees. 
  • Uncover the casserole dish, and sprinkle 1 cup of parmesan cheese over the mixture. Top with shredded cheddar cheese. 
  • Bake for 45-55 minutes until it is cooked through and the liquid has been absorbed. If the top browns too quickly, cover with foil and continue cooking until the casserole is cooked through.
  • Serve with fresh fruit.

Nutrition

Calories: 1010kcalCarbohydrates: 33gProtein: 40gFat: 79gSaturated Fat: 37gCholesterol: 336mgSodium: 1767mgPotassium: 541mgFiber: 2gSugar: 11gVitamin A: 1634IUVitamin C: 1mgCalcium: 515mgIron: 3mg
Keyword croissant breakfast casserole, overnight breakfast casserole
Tried this recipe?Let us know how it was!

a breakfast casserole in a white dish on a wood table with a fork and flower cloth in the background with title text reading Overnight Sausage Croissant Breakfast Casserole

More Breakfast Casserole Recipes

If you liked this Overnight Croissant Breakfast Casserole, you might enjoy some of my other breakfast casserole recipes.

Want some veggies in your dish? Try my Make Ahead Sausage and Spinach Strata.

a slice of sausage and spinach strata on a white plate on a white table with the rest of the casserole in a glass dish behind it

If you’re looking for something sweeter, you’ll love this Make Ahead Blueberry French Toast Casserole!

some blueberry french toast casserole on a white plate on a brown table next to a blue linen next to a glass baking dish of the rest of the casserole with a metal spoon in it

 

 

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