Introduction to Overnight Croissant Breakfast Casserole: Holiday Brunch Recipes

Make your mornings feel special with this irresistible Overnight Croissant Breakfast Casserole. Buttery croissants, savory meats, melted cheese, and a rich egg custard come together in one decadent dish that you can prep the night before. Wake up, bake, and serve—this recipe turns brunch into a no-stress, all-flavor experience that everyone will look forward to.

Why You’ll Love This Overnight Croissant Breakfast Casserole

  • Prep Ahead Convenience – Assemble it the night before and enjoy a hassle-free morning.
  • Rich and Buttery Texture – Croissants soak up the creamy custard for a soft, indulgent bite.
  • Perfect for Entertaining – A crowd-pleaser that looks impressive but takes minimal effort.
  • Customizable to Your Taste – Add your favorite veggies, cheeses, or proteins.
  • Great for Leftovers – Reheats beautifully for an easy breakfast the next day.

Whether you’re hosting a brunch or just treating yourself to something special, this croissant breakfast casserole is a comforting, flavorful way to start your day.

Ingredients for Overnight Croissant Breakfast Casserole

Flaky, creamy, and full of flavor—these ingredients are all you need for the ultimate brunch comfort. Here’s what you’ll need:

  • Croissants: The star of the show! Flaky and buttery, they soak up the egg mixture beautifully.
  • Eggs: These provide the base for your casserole, adding richness and protein.
  • Whole Milk: This adds creaminess and helps create a custard-like texture.
  • Shredded Cheddar Cheese: A must for that gooey, melty goodness. Feel free to experiment with different cheeses!
  • Cooked Breakfast Sausage: Adds a savory kick. You can swap it for bacon or omit it for a vegetarian option.
  • Diced Bell Pepper: Adds color and a slight crunch. Use any color you like for a vibrant dish.
  • Diced Onion: Brings sweetness and depth of flavor. Yellow or white onions work best.
  • Garlic Powder: A sprinkle of this elevates the flavor profile without overpowering the dish.
  • Salt and Black Pepper: Essential for seasoning. Adjust to your taste preferences.
  • Paprika: Adds a hint of smokiness and a beautiful color to the casserole.
  • Fresh Parsley: For garnish, it adds a pop of color and freshness to the final dish.

For those looking to mix things up, consider adding spinach or mushrooms for extra veggies. You can find the exact measurements for each ingredient 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 dish ready to impress your guests. Let’s dive in!

Step 1: Preheat and Prepare

Start by preheating your oven to 350°F (175°C). While it warms up, grab a 9×13-inch baking dish and grease it with cooking spray or butter. This will ensure your casserole comes out easily and doesn’t stick. Trust me, no one wants a casserole disaster on a holiday morning!

Step 2: Whisk the Egg Mixture

In a large mixing bowl, crack open those eight eggs. Add in two cups of whole milk, a teaspoon of garlic powder, half a teaspoon of salt, a quarter teaspoon of black pepper, and a sprinkle of paprika. Whisk everything together until it’s well combined. This mixture is the heart of your casserole, so make sure it’s nice and smooth!

Step 3: Layer the Ingredients

Now, it’s time to build your masterpiece. Tear the croissants into bite-sized pieces and layer them evenly in the prepared baking dish. Next, sprinkle the cooked breakfast sausage, diced bell pepper, and onion over the croissants. This layering creates a beautiful mix of flavors and textures that will make your taste buds dance!

Step 4: Pour and Press

Carefully pour the egg mixture over the layered ingredients. Make sure every croissant piece is soaked in that delicious egg goodness. Use a spatula to gently press down on the layers. This helps the croissants absorb the liquid, ensuring a moist and flavorful casserole.

Step 5: Refrigerate Overnight

Cover the baking dish with plastic wrap and pop it in the refrigerator. Let it chill for at least two hours, but overnight is best. This allows the flavors to meld beautifully, making each bite a delightful experience. Plus, it saves you time in the morning!

Step 6: Bake to Perfection

In the morning, take the casserole out of the fridge and let it sit at room temperature for about 15 minutes. Then, bake it in your preheated oven for 35-40 minutes. You’ll know it’s done when it’s puffed up and golden brown. A knife inserted in the center should come out clean. Let it cool for a few minutes before slicing. Your Overnight Croissant Breakfast Casserole is now ready to be devoured!

Tips for Success

  • Use day-old croissants for better absorption of the egg mixture.
  • Feel free to customize with your favorite veggies or cheeses.
  • Let the casserole sit at room temperature before baking for even cooking.
  • Check for doneness by inserting a knife; it should come out clean.
  • For extra flavor, add herbs like thyme or chives to the egg mixture.

Equipment Needed

  • Baking Dish: A 9×13-inch dish is ideal, but any similar-sized dish will work.
  • Mixing Bowl: A large bowl for whisking the egg mixture; a smaller bowl can suffice.
  • Whisk: Essential for blending ingredients; a fork can do the job in a pinch.
  • Spatula: Perfect for pressing down layers and serving; a wooden spoon can also work.

Variations on Overnight Croissant Breakfast Casserole

  • Vegetarian Delight: Omit the sausage and add more veggies like spinach, mushrooms, or zucchini for a fresh twist.
  • Cheese Lovers: Swap cheddar for mozzarella, feta, or pepper jack to create a unique flavor profile.
  • Herb Infusion: Incorporate fresh herbs like basil, thyme, or dill into the egg mixture for an aromatic boost.
  • Sweet and Savory: Add diced apples or pears for a hint of sweetness that pairs beautifully with the savory elements.
  • Spicy Kick: Mix in jalapeños or a dash of hot sauce to give your casserole a fiery edge.

Serving Suggestions for Overnight Croissant Breakfast Casserole

  • Fresh Fruit Salad: A colorful mix of seasonal fruits adds a refreshing contrast.
  • Crispy Bacon: Serve alongside for a savory crunch that complements the casserole.
  • Hot Coffee or Mimosas: Pair with your favorite morning beverages for a festive touch.
  • Garnish with Parsley: A sprinkle of fresh parsley elevates the presentation.

FAQs about Overnight Croissant Breakfast Casserole

Can I make this casserole ahead of time?

Absolutely! The Overnight Croissant Breakfast Casserole is designed for make-ahead convenience. Prepare it the night before and let it chill 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, brioche, or even bagels. Just ensure they’re slightly stale to absorb the egg mixture well.

Can I freeze leftovers?

Yes, you can freeze leftovers! Just slice the casserole and wrap individual portions tightly in plastic wrap. When you’re ready to enjoy, thaw in the fridge overnight and reheat in the oven.

How do I know when the casserole is done baking?

Your casserole is ready when it’s puffed up and golden brown. Insert a knife into the center; if it comes out clean, you’re good to go!

Can I make a vegetarian version of this casserole?

Definitely! Simply omit the sausage and load up on your favorite vegetables like spinach, mushrooms, or zucchini. You’ll still get a delicious and satisfying dish!

Final Thoughts

There’s a certain joy that comes from sharing a meal, especially one as delightful as the Overnight Croissant Breakfast Casserole. This dish not only brings comfort but also creates lasting memories around the table. The ease of preparation allows you to focus on what truly matters—spending quality time with family and friends. Each bite is a warm hug, filled with flavors that dance on your palate. So, whether it’s a holiday gathering or a casual brunch, this casserole is sure to impress and satisfy. Embrace the joy of cooking and let this recipe be a part of your cherished moments!

Isabella

Overnight Croissant Breakfast Casserole: Brunch Made Easy!

A delicious and easy Overnight Croissant Breakfast Casserole perfect for holiday brunches.
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 2 hours 55 minutes
Servings: 8 servings
Course: Breakfast
Cuisine: American
Calories: 350

Ingredients
  

  • 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 any color
  • 1/2 cup diced onion
  • 1 teaspoon garlic powder
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/4 teaspoon paprika
  • Fresh parsley chopped (for garnish)

Method
 

  1. Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish with cooking spray or butter.
  2. In a large mixing bowl, whisk together the eggs, whole milk, garlic powder, salt, black pepper, and paprika until well combined.
  3. Layer the torn croissant pieces evenly in the prepared baking dish. Sprinkle the cooked sausage, diced bell pepper, and onion over the croissants.
  4. Pour the egg mixture over the croissant and sausage layers, ensuring everything is evenly soaked. Press down gently with a spatula to help the croissants absorb the liquid.
  5. Sprinkle the shredded cheddar cheese evenly on top.
  6. Cover the baking dish with plastic wrap and refrigerate for at least 2 hours, or preferably overnight, to allow the flavors to meld and the croissants to soak up the egg mixture.
  7. In the morning, remove the casserole from the refrigerator and let it sit at room temperature for about 15 minutes.
  8. Bake in the preheated oven for 35-40 minutes, or until the casserole is puffed and golden brown. A knife inserted in the center should come out clean.
  9. Let it cool for a few minutes before slicing. Garnish with chopped parsley before serving.

Nutrition

Serving: 1sliceCalories: 350kcalCarbohydrates: 18gProtein: 18gFat: 24gSaturated Fat: 10gPolyunsaturated Fat: 14gCholesterol: 220mgSodium: 600mgFiber: 1gSugar: 2g

Notes

  • For a vegetarian version, omit the sausage and add more vegetables like spinach or mushrooms.
  • Try using different types of cheese, such as mozzarella or feta, for a unique flavor twist.

Tried this recipe?

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