Name: Heavenly Overnight Croissant Breakfast Casserole to Wow You
Prep time: 30 min
Cook time: 45 min
Total time: 555 min
Ingredients: 5 day-old croissants (torn into chunks); 1 lb ground sausage (cooked); 2 cups cheddar cheese (or other cheese varieties); 6 large eggs; 2 cups whole milk; 1 tsp salt; 0.5 tsp black pepper; 1 tsp garlic powder; 1 tsp onion powder; 1 tbsp fresh parsley (optional garnish); 1 cup additional cheese (for topping); to taste hot sauce or red pepper flakes (for spiciness)

As the sun peeks through the kitchen window, the aroma of warm, buttery croissants mingling with savory sausage is enough to stir anyone from sleep. This is not just breakfast; it’s an experience waiting to unfold with my Overnight Croissant Breakfast Casserole. Perfect for those chaotic mornings or leisurely brunches, this dish combines simple ingredients and a touch of love to provide both comfort and convenience. You can whip it up the night before, ensuring a stress-free morning while enjoying the company of family and friends. Plus, its versatility means you can customize it with your favorite veggies or cheeses, making it a true crowd-pleaser. Who wouldn’t want a cozy slice of this golden casserole to kickstart their day? Ready to create a breakfast masterpiece that everyone will rave about? Let’s get cooking!

Why is this casserole a must-try?

Heavenly Flavors: The rich combination of buttery croissants and creamy eggs creates a flavor explosion that will make your taste buds dance.

Effortless Prep: Simply assemble the casserole the night before, and let it chill overnight for a hassle-free breakfast experience.

Versatile Options: Feel free to swap in your favorite ingredients, like veggies or different cheeses, to tailor it to your family’s preferences.

Impressive Presentation: This golden, fluffy dish is sure to impress your guests and make any brunch feel special.

Nutritional Boost: Packed with protein and satisfying textures, it’s a hearty way to start the day, especially when paired with fresh fruit or a light salad. Discover how to elevate your morning with this Blueberry Pancakes Breakfast idea alongside your casserole!

Overnight Croissant Breakfast Casserole Ingredients

For the Casserole

Croissants – Day-old croissants work best as they absorb the egg mixture without getting soggy.
Ground Sausage – Provides essential savory depth; can be swapped for turkey, chicken, or plant-based alternatives.
Cheddar Cheese – Adds creaminess and flavor; feel free to use variations like Swiss, Monterey Jack, or mozzarella.
Large Eggs – The foundation of the dish, creating a custard-like texture.
Whole Milk – Infuses moisture and richness into the casserole.
Salt – Enhances the overall flavor profile.
Black Pepper – A subtle spice that elevates the dish.
Garlic Powder – Delivers savory undertones that complement the other ingredients.
Onion Powder – Adds a sweet depth of flavor to the mix.
Fresh Parsley – Optional garnish that brightens the dish with a pop of color.

For the Toppings

Additional Cheese – Sprinkle on top 10 minutes before baking for a melty, crispy finish.
Hot Sauce or Red Pepper Flakes – For those who like a spicy kick added to their Overnight Croissant Breakfast Casserole.

Whether you’re hosting a brunch or just treating yourself to a cozy breakfast, these ingredients will ensure a satisfyingly delicious start to your day!

Step‑by‑Step Instructions for Overnight Croissant Breakfast Casserole

Step 1: Prepare the Baking Dish
Start by greasing a 9×13-inch baking dish with cooking spray or butter to prevent sticking. Tear 5 day-old croissants into large, uneven chunks, about 2-3 inches in size, and arrange them evenly in the dish. Layering them snugly allows the egg mixture to soak in better, setting the foundation for your Overnight Croissant Breakfast Casserole.

Step 2: Cook the Sausage
In a skillet over medium heat, cook 1 lb of ground sausage until it’s well browned and cooked through, about 5-7 minutes. Make sure to break it apart with a spatula as it cooks. Once done, drain any excess grease and sprinkle the hot sausage evenly over the croissant chunks, adding savory depth to the casserole.

Step 3: Whisk the Egg Mixture
In a large mixing bowl, whisk together 6 large eggs and 2 cups of whole milk until fully combined and frothy, about 1-2 minutes. Season the mixture with a teaspoon of salt, half a teaspoon of black pepper, along with a teaspoon each of garlic powder and onion powder. This egg mixture will create a creamy custard base that will soak into the croissants and sausage, enhancing the flavors.

Step 4: Combine Layers
Carefully pour the egg mixture over the croissant and sausage layers in the baking dish, ensuring even distribution. Gently press down on the croissants with a spatula or your hands to help them absorb the custard mixture. This step is crucial for a flavorful and moist Overnight Croissant Breakfast Casserole when baked.

Step 5: Refrigerate Overnight
Cover the baking dish tightly with plastic wrap or aluminum foil and refrigerate overnight. This resting period allows the flavors to meld beautifully and gives the croissants time to absorb the egg mixture, resulting in a deliciously rich and fluffy casserole that’s ready to be baked in the morning.

Step 6: Preheat the Oven
The next morning, preheat your oven to 350°F (175°C). This ensures that your Oven Croissant Breakfast Casserole starts baking at the right temperature, creating that golden, fluffy texture we all love. Set a timer for 10 minutes while you prepare to bake—this timing is key for perfectly cooked layers.

Step 7: Bake the Casserole
Remove the cover from the baking dish and place it in the preheated oven. Bake for 45 minutes or until the casserole is set in the center and lightly golden on top. For a crispy, cheesy finish, sprinkle additional cheese on top and broil for 2 minutes, keeping a close eye to avoid burning.

Step 8: Serve and Enjoy
Once baked, let your Overnight Croissant Breakfast Casserole stand for about 5-10 minutes before slicing into squares. This resting period allows the casserole to firm up slightly, making it easier to serve. Pair it with fresh fruit or a light salad for a delightful brunch experience that’s sure to impress your family and friends.

Expert Tips for Overnight Croissant Breakfast Casserole

Use Day-Old Croissants: Stale croissants absorb the egg mixture better without getting overly soggy, resulting in a fluffier casserole.
Don’t Skip Refrigeration: Allowing your casserole to chill overnight is crucial for the flavors to meld and the texture to set perfectly.
Control Your Toppings: Add cheese during the last 10 minutes of baking for a melty finish, but be careful not to overdo it to avoid a greasy top.
Watch the Baking Time: Check for doneness at 40 minutes; overbaking can lead to dryness, whereas perfect timing gives you a golden, fluffy result.
Season Generously: Don’t skimp on the seasoning in the egg mixture—this is key for elevating the taste of your Overnight Croissant Breakfast Casserole.

Make Ahead Options

Preparing the Overnight Croissant Breakfast Casserole in advance is a game-changer for busy mornings! You can assemble this casserole up to 24 hours ahead of time by following the initial steps—just remember to cover it with plastic wrap or aluminum foil before refrigerating overnight. This will help the croissants absorb the delicious egg mixture perfectly, ensuring that every bite is just as scrumptious as when fresh. To finish, simply preheat your oven to 350°F (175°C) and bake for 45 minutes, or until golden and set. You could even make it up to 3 days in advance and freeze it! Just thaw in the fridge overnight before baking for a delightful brunch dish that’s ready with minimal effort.

What to Serve with Overnight Croissant Breakfast Casserole

Indulge in a delightful breakfast spread that complements the comforting, savory notes of your casserole, elevating your brunch experience.

Fresh Fruit Salad: A mix of seasonal berries and melons adds a burst of refreshing sweetness that lightens the rich casserole.
Light Green Salad: Tossed greens with a tangy vinaigrette offer a crisp contrast, bringing a refreshing balance to the creamy, cheesy dish.
Savory Breakfast Potatoes: Crispy, herbed potatoes provide a satisfying crunch, making for a hearty and fulfilling brunch spread.
Yogurt Parfaits: Layered with granola and fresh fruit, these are a lighter option that adds texture and a touch of sweetness, enhancing the meal.
Honey-Glazed Bacon: Sweet and smoky, this irresistible side brings a touch of indulgence, perfectly complementing the savory casserole.

Pair your casserole with a steaming cup of freshly brewed coffee or some zingy mimosas for that extra touch of luxury!

Storage Tips for Overnight Croissant Breakfast Casserole

Fridge: Store leftovers in an airtight container for up to 3 days. Reheat individual portions in the microwave or oven until warmed through.

Freezer: You can freeze the assembled casserole before baking for up to 2 months. Wrap tightly in plastic wrap and foil to prevent freezer burn.

Reheat: For baked leftovers, reheat in the oven at 350°F (175°C) for about 20-25 minutes until heated through and crispy on top.

Thawing: If frozen, move the casserole to the fridge the night before to thaw before baking or reheating. Enjoy the effortless deliciousness of your Overnight Croissant Breakfast Casserole!

Overnight Croissant Breakfast Casserole Variations

Feel free to get creative and tailor this casserole to your taste buds with these delicious tweaks!

Brioche Delight: Swap croissants for brioche for a sweeter, richer twist that’s equally yolky and comforting.
Veggie Boost: Stir in sautéed spinach, mushrooms, or bell peppers for a pop of nutrition and color. It’s a simple way to get more greens on your plate!
Spicy Kick: Add hot sauce or red pepper flakes for a zesty surprise that elevates the entire dish—perfect for those who love a touch of heat.
Cheese Variety: Experiment with different cheese blends! Try Swiss, Monterey Jack, or even feta for a tangy kick. Each cheese brings its unique flavor profile.
Meat Swap: Replace ground sausage with turkey, chicken sausage, or a plant-based option to suit your dietary needs or preferences—without sacrificing flavor.
Herb Infusion: Enhance the flavor by incorporating fresh herbs like thyme or chives into the egg mixture for an aromatic touch that dances on your taste buds.
Nutty Crunch: Top with toasted nuts or breadcrumbs before baking for an extra crunch that adds delightful texture to every bite.
Sweet Touch: For a brunch dessert vibe, add a dash of vanilla and a sprinkle of cinnamon to the egg mixture, turning it into a delightful sweet treat.

For more breakfast inspiration, consider making a side of Blueberry Pancakes Breakfast to serve alongside your casserole for an unforgettable brunch spread. Or, complement this dish with succulent bites from a Turkey Egg Breakfast. Happy cooking!

Overnight Croissant Breakfast Casserole Recipe FAQs

What kind of croissants should I use for the casserole?
I recommend using day-old croissants as they absorb the egg mixture better without becoming soggy. Fresh croissants can be too soft, leading to a less stable structure in the casserole.

How long can I store my leftovers?
Store any leftover Overnight Croissant Breakfast Casserole in an airtight container in the fridge for up to 3 days. To reheat, simply pop it in the microwave or oven until warmed through, about 10-15 minutes.

Can I freeze this casserole?
Absolutely! You can freeze the assembled casserole before baking for up to 2 months. Make sure to wrap it tightly in plastic wrap and foil to prevent freezer burn. When you’re ready to bake, thaw it in the refrigerator overnight before cooking.

What if my casserole is too soggy after baking?
If your Overnight Croissant Breakfast Casserole turns out soggy, it could be due to using fresh croissants rather than stale ones. For next time, ensure you’re using day-old croissants. Additionally, allowing it to sit uncovered in the oven for a few minutes after baking can help evaporate excess moisture and firm it up.

Can I customize the ingredients to fit dietary needs?
Very! This casserole is incredibly versatile. You can substitute ground sausage with turkey, chicken, or a plant-based option. For a dairy-free version, try using almond or oat milk and vegan cheese. Plus, feel free to mix in sautéed veggies like spinach or mushrooms for added nutrition.

Is this dish safe for my pets?
While the ingredients in the Overnight Croissant Breakfast Casserole are delicious for humans, it’s not advisable to share with pets. Foods like onions and garlic can be harmful to them. Always double-check the ingredients before offering anything from your plate to furry friends!