Breakfast Croissant Casserole

Name: Breakfast Croissant Casserole
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 6 servings
Ingredients: 6 large croissants, cut into pieces; 6 large eggs; 2 cups milk; 1/2 cup shredded cheese (cheddar or mozzarella); 1 cup cooked and crumbled bacon or sausage; 1/4 cup chopped green onions; Salt and pepper to taste; Optional: 1/2 teaspoon ground nutmeg

Highlighted under: Homestyle Happiness

I love starting my day with a warm, comforting dish that feels both indulgent and satisfying. The Breakfast Croissant Casserole has quickly become a staple in our household, especially on lazy weekend mornings. This recipe takes just a few minutes to prepare and combines the flaky texture of croissants with a delicious custard mixture, eggs, and your choice of fillings. It’s perfect for feeding a crowd or just enjoying a leisurely brunch with loved ones.

Created by

Natalie Briggs

Last updated on 2026-02-01T19:57:35.785Z

When I first made this Breakfast Croissant Casserole, I was amazed at how a few simple ingredients could transform into such a delightful dish. The buttery croissants soak up the custard beautifully, creating a soft, pillowy texture that pairs perfectly with crispy bacon or vibrant vegetables.

In experimenting with different fillings, I discovered that adding a hint of nutmeg really brightens the dish. The warm spices with the freshness of herbs elevate the flavors and make each bite unforgettable. I highly recommend trying it with some cheese for an extra gooey surprise!

        Why You'll Love This Recipe
        Flaky croissants create a delightful texture.
Versatile with fillings of your choice.
Perfect for brunch gatherings or meal prep.

      

Choosing the Right Croissants

When selecting croissants for the Breakfast Croissant Casserole, freshness is key. Opt for bakery-fresh croissants for the best results, as they retain moisture and texture. If you use day-old croissants, you may want to lightly toast them before cutting to help them absorb the custard without becoming overly soggy. Flaky, buttery croissants will create a delightful texture that contrasts with the custard, while still soaking up the rich flavors of your chosen fillings.

If you're feeling adventurous, consider using flavored croissants, such as chocolate or almond, for a unique twist on this classic dish. Keep in mind that sweeter croissants will alter the flavor profile, making it more of a brunch dessert than a savory breakfast. Balance sweet with savory fillings like cream cheese or bacon for an inspired taste contrast.

Customizing Your Fillings

One of the greatest joys of the Breakfast Croissant Casserole is its versatility. While the recipe calls for bacon or sausage, you can easily substitute these proteins with plant-based alternatives, such as crumbled tofu or tempeh seasoned with your favorite spices. This makes it a fantastic option for vegetarians or those looking to reduce meat consumption without sacrificing flavor.

Fruits like blueberries or diced apples can lend a sweet touch when paired with creamy cheeses such as goat cheese or ricotta. For a more robust flavor, consider adding sautéed mushrooms or spinach. The options are endless, and this adaptability means you can tailor the dish to suit seasonal ingredients or dietary preferences.

Ingredients

Gather these ingredients to whip up your Breakfast Croissant Casserole:

Main Ingredients

6 large croissants, cut into pieces
6 large eggs
2 cups milk
1/2 cup shredded cheese (cheddar or mozzarella)
1 cup cooked and crumbled bacon or sausage
1/4 cup chopped green onions
Salt and pepper to taste
Optional: 1/2 teaspoon ground nutmeg

Once you have all your ingredients ready, let's move on to the preparation!

Instructions

Here's how to prepare your Breakfast Croissant Casserole:

Prepare the Base

Preheat your oven to 350°F (175°C). In a large mixing bowl, whisk together the eggs, milk, salt, pepper, and nutmeg if using. Fold in the chopped croissant pieces carefully until they are well-coated with the custard mixture.

Add Fillings

Layer the crumbled bacon or sausage into a greased 9x13-inch baking dish. Pour the custard-coated croissants over the meat, and sprinkle the shredded cheese and green onions on top.

Bake the Casserole

Bake in the preheated oven for about 30 minutes, or until the top is golden brown and a knife inserted into the center comes out clean. Let it cool for a few minutes before serving.

Serve warm and enjoy!

Pro Tips

For a sweeter twist, consider adding fruit like berries or apples to the mixture. You can also switch up the cheese for a sharp feta or creamy brie to suit your taste.

Storing and Reheating

To store leftover Breakfast Croissant Casserole, allow it to cool completely, then cover it tightly with plastic wrap or transfer it to an airtight container. It can be kept in the refrigerator for up to 3 days. When reheating, you can either microwave individual portions for 1-2 minutes or place the whole casserole in a preheated oven at 350°F (175°C) for about 15-20 minutes, until warmed through. This method helps restore some of that original crispiness on top.

If you're planning to make this casserole ahead of time, consider preparing the custard mixture and croissant layers the night before. Simply cover and refrigerate overnight. On the day of serving, add your toppings, and bake as per the original instructions. This makes it hassle-free for busy mornings or brunch gatherings.

Scaling the Recipe

If you're hosting a larger gathering, this recipe scales beautifully. Simply double the ingredients and use a larger baking dish, such as a 12x18-inch pan. Keep an eye on the baking time, as a larger volume will require around 10-15 additional minutes in the oven. Check for doneness by inserting a knife into the center; it should come out clean when the casserole is fully cooked.

You can also make individual servings by using ramekins. Distribute the ingredients evenly among them and adjust the baking time to about 20-25 minutes. This is a fun way to serve the casserole, and it allows everyone to have their own portion, customizing toppings as they like!

Questions About Recipes

→ Can I make this casserole ahead of time?

Yes! You can prepare the casserole the night before, cover it, and refrigerate. Just bake it in the morning.

→ What other fillings can I use?

Feel free to experiment with vegetables such as spinach, bell peppers, or mushrooms, as well as different types of cheese.

→ How long will leftovers last?

Leftovers can be stored in the refrigerator for up to 3 days. Reheat in the oven for the best texture.

→ Can I freeze this casserole?

Yes, you can freeze the unbaked casserole for up to 2 months. Just thaw in the refrigerator overnight and bake as directed.