Celebration Breakfast Casserole (with Sausage & Croissant!)
This Easy Breakfast Casserole with Sausage and croissant is the perfect cozy brunch or make-ahead breakfast. What I love about this breakfast is that it feels indulgent and bakery-style, but it’s incredibly simple to throw together.
I’ve been making this for holidays, lazy weekends, and anytime I need a crowd-pleasing breakfast.The buttery croissants soak up the egg mixture and bake into a delicious casserole with crispy golden edges and savory sausage in every bite.
If you like this dish, you should try my Crispy Chicken Breakfast Burritos , Strawberry Oatmeal Bake, Healthy McGriddle Muffins, or Cottage Cheese Crustless Quiche.
Why You Will Love This Breakfast
Easy cooking
Simple layering and a quick egg mixture make this effortless.
Comforting & satisfying
Buttery croissants, savory sausage, and melted cheese make it feel extra special.
Perfect for meal prep or brunch
Great for feeding a crowd or reheating throughout the week.
Ingredients
Ground sausage – Adds flavorful protein throughout the casserole.
Croissants – Buttery, flaky base that soaks up the egg mixture.
Eggs – The base that binds everything together into a casserole.
Milk – Helps create a soft texture.
Shredded cheese – Adds richness and melty goodness in every bite.
Italian seasoning – Brings herby, savory flavor.
Salt – Enhances all the ingredients.
Substitutions and Variations
Use a different protein:
Try bacon, ham, or turkey sausage.
Add vegetables:
Spinach, bell peppers, mushrooms, or onions work great.
Change the cheese:
Cheddar, mozzarella, or Swiss all taste delicious.
Make it spicy:
Use spicy sausage or add red pepper flakes.
Make it lighter:
Use skim milk or almond milk
Instructions
- Preheat oven: Heat oven to 350°F and grease a casserole dish.
- Cook sausage: In a skillet, cook 1 lb ground sausage until browned. Drain excess grease.
- Assemble casserole: Layer torn croissants evenly in the baking dish. Top with cooked sausage.
- Add cheese: Sprinkle shredded cheese generously over the top.
- Mix egg base: In a bowl, whisk together eggs, milk, Italian seasoning, and salt.
- Pour mixture: Pour egg mixture evenly over the croissants, sausage, and cheese. Gently press down so croissants absorb the liquid.
- Bake: Bake for 35–40 minutes, or until the casserole is set and golden brown on top.
- Serve: Let cool slightly, slice, and enjoy warm.
Tips and Notes
- Let the croissants soak for 5–10 minutes before baking for a softer texture.
- Use day-old croissants for best structure.
- Cover loosely with foil if the top browns too quickly.
- This easily reheats for busy mornings.
Recipe FAQs
Can I make this ahead?
Yes! Assemble the night before and bake in the morning.
Can I freeze it?
Yes, slice and freeze individual portions for easy breakfasts.
Can I use store-bought croissants?
Absolutely bakery or grocery croissants both work well.
Serving Suggestions
- Serve with fresh fruit
- Pair with yogurt or smoothies
- Add hot sauce or maple syrup on top
- Serve with coffee for a cozy brunch
Freezer Instructions
1. Cool completely.
Never freeze hot food. Let it cool completely first (you can even refrigerate it overnight). Before sealing, wipe away any condensation inside the container to help prevent ice crystals from forming.
2. Portion it for real life.
Freeze the amount you'll actually use. If your family won't eat a whole casserole in one night, divide it into smaller portions instead. Smaller portions also thaw much faster.
3. Leave a little room.
Don't fill containers all the way to the top, foods expand slightly as they freeze.
4. Label everything.
Write the recipe name and the date on each container so you know exactly what's waiting in your freezer.
5. Freeze.
I love freezing meals in 2-cup silicone freezer cubes. They're the perfect size for lunches or small dinners, stack beautifully, and thaw much faster than one giant frozen block.
How to Reheat
For best results, transfer your meal to the refrigerator the night before.
If it's still a little frozen in the center, microwave on the Defrost setting in 5-minute intervals until it can be broken apart easily.
Then simply reheat like you would any leftovers:
- Bake casseroles in the oven.
- Warm soups, pasta, and skillet meals on the stovetop.
- Use the microwave for quick meals.
- The air fryer works great for foods that should stay crispy.
My favorite freezer rule: Reheat food the same way you originally cooked it whenever possible. It almost always gives you the best texture.
Storage Tip: For the best flavor and texture, enjoy freezer meals within about 3 months.
Storage and Reheating Instructions
Storage:
Store in an airtight container in the refrigerator for up to 4 days.
Reheating:
Warm slices in the microwave or oven until heated through.
I hope you are Over the Spoon for this recipe!
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Easy Breakfast Casserole with Croissant & Sausage
Ingredients
- 1 lb ground sausage cooked and drained
- 6 –8 croissants torn into pieces
- 2 cups shredded cheddar cheese
- 12 large eggs
- 1 cup milk
- 1 teaspoon Italian seasoning
- 1 teaspoon salt
Instructions
- Preheat oven to 350°F and grease a casserole dish.
- Cook sausage in a pan, then drain and set aside.
- Layer croissants and sausage in dish, then top with cheese.
- In a bowl, whisk eggs, milk, seasoning, and salt together.
- Pour over casserole and press lightly to allow croissants to absorb eggs.
- Bake for 35–40 minutes until set and golden.
- Let cool slightly, slice, and serve.
Notes
Nutrition information is an estimate and may vary depending on the specific ingredients and brands used. I am not a registered dietitian, and nutritional values should be considered a general guide only.
Fantastic!! A Father’s Day hit
My dad LOVED this! We will make for every birthday brunch