As I stood in my kitchen, the aroma of freshly baked croissants wafting through the air, I couldn’t help but think about indulging in something comforting yet effortless. That’s when the idea for my Ham and Cheese Croissant Breakfast Casserole came to life! This delightful dish is not only easy to prepare but also a showstopper for brunch gatherings and holiday mornings alike. Imagine buttery croissants mingling with smoky ham and gooey cheese, creating a rich and flavorful dish that’s perfect for lazy weekends. Plus, it’s make-ahead friendly—giving you more time to enjoy your loved ones and the moments that matter. Curious how to create this crowd-pleaser in your own kitchen? Let’s dive into the recipe!

Why is this casserole so special?
Comforting and Delicious: This Ham and Cheese Croissant Breakfast Casserole is a warm hug on a plate! The blend of buttery croissants, smoky ham, and gooey cheese creates a soul-satisfying start to your day.
Effortless Preparation: You can whip this dish up quickly, making it perfect for busy mornings. Plus, it’s a hassle-free make-ahead option! Just assemble the ingredients the night before and bake when you’re ready.
Versatile Variations: Feel free to mix it up! Try adding sautéed spinach or use bacon instead of ham for a new twist. Each variation brings its own delightful flavor profile.
Crowd-Pleasing Appeal: Ideal for family gatherings or holiday brunch, this casserole is sure to impress. Pair it with a fresh fruit salad or a light salad for a balanced meal.
Inspired by Tradition: Drawing inspiration from French cuisine, this recipe captures the essence of classic dishes like Croque Monsieur, ensuring a delightful and comforting experience every time!
Ham and Cheese Croissant Breakfast Casserole Ingredients
• Gather these essentials to create your delightful dish!
For the Casserole
• Croissants – Use fresh, buttery croissants for optimal flakiness and texture.
• Eggs – These act as the binding agent, creating a rich custard that enhances the dish.
• Half and Half or Whole Milk – Adds creaminess; swap with non-dairy milk if desired for a lighter option.
• Dijon Mustard – Provides a subtle tang that elevates the flavor profile of your casserole.
• Salt – Adjust to your taste, keeping in mind the saltiness from the ham you choose.
• Deli or Leftover Ham – Use a smoky ham for depth; turkey or vegetarian ham can be great substitutes.
• Shredded Swiss or Gruyere Cheese – Offers a melty, creamy texture; feel free to experiment with cheddar or mozzarella.
For Finishing Touches
• Powdered Sugar – A light dusting adds a touch of sweetness, balancing the savory elements when served.
This Ham and Cheese Croissant Breakfast Casserole is a cozy delight that will have everyone coming back for seconds! Enjoy the blend of textures and flavors that pay homage to a classic French favorite.
Step‑by‑Step Instructions for Ham and Cheese Croissant Breakfast Casserole
Step 1: Preheat the Oven
Begin by preheating your oven to 350°F (175°C). While it heats up, take a moment to gather your baking dish—choose between a 9×6-inch or 9×11-inch size—then lightly coat it with cooking spray to ensure the casserole doesn’t stick. This delicious Ham and Cheese Croissant Breakfast Casserole will be able to cook evenly and release easily after baking.
Step 2: Arrange the Croissants
Tear fresh croissants in half and arrange them in the prepared baking dish, creating a base that is both buttery and flaky. Next, cut your smoky ham into thirds and distribute it evenly around the croissants, ensuring each bite is packed with flavor. To finish this layer, sprinkle a generous amount of shredded Swiss or Gruyere cheese on top, creating a melty, flavorful blanket for your casserole.
Step 3: Prepare the Egg Mixture
In a small mixing bowl, crack your eggs and whisk them together with half and half, Dijon mustard, and salt until well combined. The mixture should be smooth and creamy. Once ready, pour the egg mixture evenly over the croissants, ham, and cheese, ensuring every piece of croissant is generously soaked in this delightful custard for the perfect texture.
Step 4: Chill the Casserole
Cover the baking dish with aluminum foil and let it rest in the refrigerator for at least 30 minutes, or preferably overnight if time allows. This resting period allows the croissants to absorb the flavors and moisture from the egg mixture, enhancing the overall richness of the Ham and Cheese Croissant Breakfast Casserole.
Step 5: Bake the Casserole
When you’re ready to bake, remove the foil and place the casserole in the preheated oven. Bake for 20 minutes covered, then uncover the dish and continue baking for an additional 10-15 minutes. You’ll know it’s ready when the top turns golden brown and bubbly, filling your kitchen with irresistible aromas.
Step 6: Serve and Enjoy
Once baked, let your casserole rest for about 5 minutes before serving. This allows it to set slightly, making it easier to cut into squares. Finally, for a touch of elegance, sprinkle powdered sugar on top before serving. Your Ham and Cheese Croissant Breakfast Casserole is now ready to be enjoyed warm, perfect for brunch or any cozy morning!

How to Store and Freeze Ham and Cheese Croissant Breakfast Casserole
Fridge: Store leftovers in an airtight container for up to 1 week. Reheat in the oven at 350°F (175°C) for best results, ensuring it’s heated through.
Freezer: This casserole can be frozen for up to 3 months. Wrap portions tightly in plastic wrap and foil, then place in a freezer-safe container.
Thawing: To enjoy, thaw in the refrigerator overnight, then reheat in the oven. This method keeps the texture moist and delicious.
Make-Ahead: Assemble the Ham and Cheese Croissant Breakfast Casserole a day prior and refrigerate overnight before baking when you’re ready to serve.
Ham and Cheese Croissant Breakfast Casserole Variations
Personalize your breakfast casserole experience by exploring these delicious variations tailored just for you!
- Bacon or Sausage: Swap out ham for crispy bacon or flavorful sausage to enhance the heartiness of this dish. The added crunch and savoriness create a delightful twist!
- Vegetarian Delight: Incorporate sautéed mushrooms, spinach, or bell peppers for a vibrant vegetarian option everyone will enjoy. This not only boosts flavor but adds nutritious elements as well.
- Cheese Alternatives: Experiment with different cheeses like sharp cheddar or melt-in-your-mouth mozzarella for a unique flavor experience. Each cheese brings its own charm, perfect for cheese lovers!
- Herb Infusion: Add fresh herbs like chives, parsley, or thyme to uplift the flavor profile. This simple addition adds a garden freshness that brightens every bite.
- Spicy Kick: Introduce a kick of heat by adding jalapeños or red pepper flakes. This small change can transform the flavor and make your casserole exciting!
- Sweet Variations: Drizzle maple syrup over the casserole before serving for a wonderful sweet-savory contrast. It’s like having dessert for breakfast!
- Croissant Fusion: Use pain au chocolat or almond croissants instead of traditional ones for a decadent touch. These variations can elevate your dish to a new gourmet level.
Feel free to explore ideas like incorporating refreshing dishes such as a light salad to accompany your casserole, or if you’re craving a comforting side, a hearty Southern Squash Casserole pairs well. Whatever you choose, embracing these variations will make every brunch special!
What to Serve with Ham and Cheese Croissant Breakfast Casserole
As the warm, inviting aroma of baked goodness fills your kitchen, it’s time to think about perfect pairing companions that will elevate your brunch experience.
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Fresh Fruit Salad: A vibrant mix of seasonal fruits adds a refreshing crunch that balances the richness of the casserole. Think juicy berries, sweet melons, and zesty citrus to lift each bite.
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Mixed Greens Salad: Tossed with a light vinaigrette, this salad offers a crisp and refreshing contrast to the warm casserole. The tangy dressing cuts through the richness, making every mouthful delightful.
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Savory Breakfast Potatoes: Crispy, seasoned potatoes provide a hearty side that complements the fluffy casserole. Their crunchy exterior paired with a tender inside creates a satisfying texture.
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Buttery Croissants: For the ultimate croissant experience, serve warm, flaky croissants on the side. It’s a nod to the main ingredient and perfect for spreading with a hint of jam.
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Mimosas: Brighten the mood with a bubbly mimosa! The refreshing blend of sparkling wine and orange juice adds a festive touch and pairs beautifully with the flavors of the casserole.
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Herbed Yogurt Dip: A creamy yogurt dip infused with fresh herbs like dill or chives offers a zesty contrast. It provides a delightful creaminess that enriches the breakfast spread and appeals to all palates.
These pairing options create a well-rounded meal that is sure to please everyone gathered around your table!
Expert Tips for Ham and Cheese Croissant Breakfast Casserole
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Use Fresh Croissants: Ensure you use fresh, high-quality croissants for the best flaky texture. Stale croissants won’t absorb the custard as well, leading to a dry casserole.
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Chill Overnight: For maximum flavor absorption, let the casserole chill overnight. This step intensifies flavors and allows the croissants to soak up the egg mixture thoroughly.
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Monitor Baking Time: Keep an eye on the casserole during the last 10 minutes of baking. Over-baking can result in a tough texture instead of the golden, bubbly top you desire.
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Experiment with Cheese: While Swiss or Gruyere cheeses are delicious, feel free to try different cheeses like cheddar or mozzarella for a unique flavor twist in your Ham and Cheese Croissant Breakfast Casserole.
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Add Veggies: Consider incorporating sautéed vegetables such as spinach or bell peppers for added nutrition and a pop of color. Be mindful of moisture to maintain the casserole’s integrity.
Make Ahead Options
These Ham and Cheese Croissant Breakfast Casseroles are perfect for busy home cooks looking to save time! You can easily assemble the casserole up to 24 hours in advance. To prep, simply layer the croissants, ham, and cheese in the baking dish, then whisk together the egg mixture and pour it over. Cover the dish with aluminum foil and refrigerate it overnight, allowing the croissants to soak up the delicious custard. When you’re ready to serve the next day, bake it straight from the fridge—just be sure to add a few extra minutes if it’s still cold. This way, you’ll have a cozy breakfast ready with minimal effort, just as delicious as when made fresh!

Ham and Cheese Croissant Breakfast Casserole Recipe FAQs
What type of croissants should I use?
Absolutely! Using fresh, buttery croissants from a bakery is highly recommended for optimal flakiness and flavor. Stale croissants won’t soak up the custard mixture as well, potentially leading to a dry casserole.
How should I store leftovers?
You can store any leftovers in an airtight container in the refrigerator for up to 1 week. When ready to enjoy, simply reheat in the oven at 350°F (175°C) until heated through for the best texture.
Can I freeze the casserole?
Very! You can freeze your Ham and Cheese Croissant Breakfast Casserole for up to 3 months. Wrap individual portions tightly in plastic wrap and foil, then place them in a freezer-safe container or bag.
How do I properly thaw and reheat the frozen casserole?
To thaw, place the frozen portions in the refrigerator overnight. Once thawed, reheat in the oven at 350°F (175°C) until warmed throughout. This method will help maintain the casserole’s moist texture.
Can I make this recipe ahead of time?
Definitely! You can assemble the casserole the night before, cover it, and refrigerate overnight. This allows the croissants to absorb all the delicious flavors. Just bake it fresh in the morning for a delightful brunch!
Are there any dietary considerations for this recipe?
When it comes to dietary needs, feel free to substitute ingredients! For a vegetarian option, use plant-based ham or vegetables instead of deli ham. If anyone has dairy allergies, consider using non-dairy milk and cheese alternatives for a delicious variation.

Ham and Cheese Croissant Breakfast Casserole for Cozy Mornings
Ingredients
Equipment
Method
- Preheat the oven to 350°F (175°C) and prepare your baking dish with cooking spray.
- Tear croissants in half and arrange in the baking dish, followed by chopped ham and cheese.
- In a bowl, whisk together eggs, half and half, Dijon mustard, and salt, then pour over croissants.
- Cover with foil and chill in the refrigerator for at least 30 minutes or overnight.
- Bake covered for 20 minutes, then uncover and bake for an additional 10-15 minutes until golden brown.
- Let rest for 5 minutes, sprinkle with powdered sugar, and serve warm.

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