Introduction to Overnight Croissant Breakfast Casserole
Flaky, buttery croissants soaked overnight in a savory egg custard with gooey cheese, smoky bacon or sausage, and just a touch of cream—this Overnight Croissant Breakfast Casserole makes waking up feel like a weekend luxury. The croissants soak up the rich flavors while maintaining their signature crisp edges after baking. Prep it the night before, pop it in the oven in the morning, and enjoy a warm, indulgent breakfast with zero morning stress.
Why You’ll Love This Recipe:
Flaky croissants create an unbeatable texture.
Perfect for brunch, holidays, or feeding a crowd.
No early-morning cooking—just bake and enjoy.
Easily customizable with your favorite add-ins.
Savory, comforting, and absolutely satisfying.
Ingredients for Overnight Croissant Breakfast Casserole
We’re building this recipe layer by layer—starting with the good stuff.
Croissants: The star of the show! Use large, buttery croissants for that flaky texture.
Eggs: Essential for binding everything together and providing that rich flavor.
Whole Milk: Adds creaminess to the egg mixture, making it extra luscious.
Shredded Cheddar Cheese: A must for that melty, cheesy goodness that everyone loves.
Breakfast Sausage: Cooked and crumbled, it brings a savory kick to the dish.
Bell Pepper: Diced for a pop of color and a hint of sweetness.
Onion: Adds depth and flavor; you can use yellow or white onions based on your preference.
Garlic Powder: A sprinkle of this elevates the flavor profile without overpowering it.
Salt and Black Pepper: Essential seasonings to enhance all the flavors.
Cayenne Pepper (optional): For those who like a little heat, this adds a nice kick.
Fresh Parsley (optional): A lovely garnish that adds freshness and color to your dish.
For those looking to mix things up, consider substituting the breakfast sausage with diced ham or crispy bacon. You can also add a touch of sweetness by incorporating diced strawberries or blueberries before baking. The exact quantities for each ingredient can be found at the bottom of the article, ready for printing!
How to Make Overnight Croissant Breakfast Casserole
Creating this Overnight Croissant Breakfast Casserole is a breeze! Follow these simple steps, and you’ll have a delicious breakfast ready to impress. Let’s dive in!
Step 1: Prepare the Egg Mixture
Start by grabbing a large mixing bowl. Whisk together the eggs and whole milk until they’re well combined. This is where the magic begins! Add in the garlic powder, salt, black pepper, and cayenne pepper if you’re feeling adventurous. Whisk until everything is blended smoothly. This egg mixture is the heart of your casserole, bringing all the flavors together. Trust me, it’s worth the effort!
Step 2: Layer the Croissants
Next, take your torn croissant pieces and place them evenly in a greased 9×13 inch baking dish. Make sure they’re spread out nicely, as this will help them soak up all that delicious egg mixture. The croissants should be fluffy and inviting, creating a perfect base for your casserole. Don’t be shy—layer them generously!
Step 3: Add the Fillings
Now it’s time to sprinkle the cooked breakfast sausage, diced bell pepper, and onion over the croissant layer. This is where the flavor really starts to build! The sausage adds a savory punch, while the bell pepper and onion bring a fresh crunch. Spread them evenly to ensure every bite is packed with goodness. Your kitchen will start to smell amazing!
Step 4: Combine and Soak
Pour the egg mixture evenly over the croissant and filling layers. Make sure every piece of croissant is soaked in that creamy goodness. This soaking process is crucial; it allows the croissants to absorb the flavors and become fluffy during baking. Cover the dish with plastic wrap and refrigerate overnight. If you’re short on time, let it soak for at least four hours. Patience is key here!
Step 5: Bake the Casserole
When you’re ready to bake, preheat your oven to 350°F (175°C). Remove the plastic wrap and pop the casserole in the oven. Bake for 35-40 minutes, or until the top is golden brown and the eggs are set. The aroma will fill your home, making it hard to resist! Let it cool for a few minutes before slicing. Enjoy the fruits of your labor!
Tips for Success
Use day-old croissants for better absorption of the egg mixture.
Feel free to mix in your favorite veggies for added flavor and nutrition.
Let the casserole sit overnight for the best texture and taste.
Check for doneness by inserting a knife; it should come out clean.
Experiment with different cheeses for a unique twist!
Equipment Needed
9×13 inch baking dish: A standard size for casseroles; a similar-sized dish works too.
Mixing bowl: Any large bowl will do for whisking the egg mixture.
Whisk: Essential for blending; a fork can work in a pinch.
Plastic wrap: To cover the dish; a clean kitchen towel can be a substitute.
Oven mitts: Safety first when handling hot dishes!
Variations
Vegetarian Delight: Skip the sausage and add sautéed mushrooms, spinach, or zucchini for a hearty veggie version.
Sweet Twist: Incorporate diced strawberries or blueberries for a fruity flavor that pairs beautifully with the croissants.
Spicy Kick: Add jalapeños or diced green chilies for a spicy version that will wake up your taste buds.
Herb Infusion: Mix in fresh herbs like basil or chives for an aromatic touch that elevates the dish.
Gluten-Free Option: Use gluten-free croissants or bread to make this casserole suitable for gluten-sensitive guests.
Serving Suggestions
Fresh Fruit Salad: A light and refreshing side that complements the richness of the casserole.
Crispy Bacon: For those who can’t resist, serve alongside for an extra savory crunch.
Hot Coffee or Tea: A warm beverage pairs perfectly with this hearty breakfast.
Garnish with Fresh Herbs: A sprinkle of parsley or chives adds a pop of color and flavor.
FAQs about Overnight Croissant Breakfast Casserole
Can I make this casserole ahead of time?
Absolutely! The Overnight Croissant Breakfast Casserole is designed for prep ahead. Just assemble it the night before and let it soak in the fridge. This allows the flavors to meld beautifully, making your morning stress-free.
What can I substitute for croissants?
If you don’t have croissants on hand, you can use day-old bread or even bagels. Just keep in mind that the texture will change slightly, but it will still be delicious!
Can I freeze leftovers?
Yes, you can freeze leftovers! Just make sure to let the casserole cool completely before wrapping it tightly in plastic wrap and aluminum foil. It can be stored in the freezer for up to three months. Reheat in the oven when you’re ready to enjoy it again.
How do I know when the casserole is done baking?
The casserole is done when the top is golden brown and a knife inserted in the center comes out clean. If it’s still runny, give it a few more minutes in the oven.
Can I add more vegetables to the casserole?
Definitely! Feel free to add your favorite veggies like spinach, mushrooms, or even diced tomatoes. Just make sure to sauté them first to reduce moisture, ensuring your casserole doesn’t become soggy.
Final Thoughts
There’s a certain joy that comes from sharing a meal made with love, and the Overnight Croissant Breakfast Casserole embodies that spirit perfectly. It’s not just about the delicious flavors; it’s about the memories created around the breakfast table. Whether it’s a lazy Sunday morning or a special occasion, this dish brings everyone together. The ease of preparation allows you to focus on what truly matters—enjoying time with family and friends. So, roll up your sleeves, embrace the process, and let this casserole become a cherished part of your breakfast tradition. Your mornings will never be the same!
A delicious and easy Overnight Croissant Breakfast Casserole perfect for a hearty breakfast or brunch.
Ingredients
Scale
8 large croissants, torn into pieces
8 large eggs
2 cups whole milk
1 cup shredded cheddar cheese
1 cup cooked and crumbled breakfast sausage
1/2 cup diced bell pepper
1/2 cup diced onion
1 teaspoon garlic powder
1 teaspoon salt
1/2 teaspoon black pepper
1/4 teaspoon cayenne pepper (optional)
Fresh parsley for garnish (optional)
Instructions
In a large mixing bowl, whisk together the eggs, milk, garlic powder, salt, black pepper, and cayenne pepper until well combined.
In a greased 9×13 inch baking dish, layer the torn croissant pieces evenly across the bottom.
Sprinkle the cooked sausage, bell pepper, and onion over the croissants.
Pour the egg mixture evenly over the croissant and sausage layers, ensuring everything is well soaked.
Sprinkle the shredded cheddar cheese on top.
Cover the baking dish with plastic wrap and refrigerate overnight (or for at least 4 hours) to allow the flavors to meld and the croissants to soak up the egg mixture.
Preheat the oven to 350°F (175°C).
Remove the plastic wrap and bake the casserole for 35-40 minutes, or until the top is golden brown and the eggs are set.
Let it cool for a few minutes before slicing. Garnish with fresh parsley if desired.
Notes
For a sweeter twist, add 1 cup of diced strawberries or blueberries to the mixture before baking.
You can also substitute the breakfast sausage with diced ham or cooked bacon for a different flavor profile.
