As I stood in my kitchen, the warm aroma of toasting bread wafted through the air, whisking me away to a cozy French café. Today, I’m transforming the beloved Croque Monsieur into a Savory Croque Monsieur Breakfast Casserole that’s bound to become your new brunch favorite. Imagine tender cubes of crusty bread soaked in a creamy custard, layered with savory ham and gooey Gruyere cheese, all topped with a luxurious béchamel sauce. This dish is quick to assemble and perfect for feeding a crowd, making it not just a feast for the palate, but a beautiful centerpiece for your table. Whether you’re hosting friends or simply seeking a delightful way to elevate your morning routine, this breakfast casserole promises to deliver comfort and joy in every bite. Curious how to bring a taste of Paris to your kitchen? Let’s dive into this recipe!

Why is this casserole a brunch favorite?

Simplicity: This Croque Monsieur Breakfast Casserole is easy to prepare and requires minimal effort, perfect for busy mornings or last-minute brunches.

Flavor Explosion: The rich combination of ham, Gruyere cheese, and creamy béchamel creates a savory delight that will tantalize your taste buds.

Crowd-Pleasing: Ideal for gatherings, this dish serves multiple people, ensuring everyone leaves satisfied and happy.

Versatility Galore: You can easily switch out ingredients for personal preferences—as simple as adding veggies or using alternative cheeses for a unique twist!

Make-Ahead Magic: Assemble the casserole the night before and pop it in the oven the next morning, making brunch stress-free and enjoyable.

Transform your weekends with this delightful recipe, and don’t forget to check out my other favorites like the Breakfast Protein Biscuits for a complete brunch spread!

Croque Monsieur Breakfast Casserole Ingredients

Get ready to whip up this delectable dish with these essential ingredients!

For the Casserole
• White Bread – Provides the base structure of the casserole; rustic varieties are recommended for added flavor.
• Eggs – Creates a rich custard base, binding the ingredients together beautifully.
• Half and Half – Adds creaminess to the custard; substitute with milk or a non-dairy alternative for a lighter option.
• Dijon Mustard – Enhances flavor with a tangy touch; yellow mustard makes a suitable substitute.
• Sliced Ham – Incorporates savory depth; turkey or plant-based alternatives can be used for variety.
• Gruyere Cheese – Delivers a nutty flavor and superb melting quality; can be swapped with Swiss or mozzarella.

For the Béchamel Sauce
• Butter – Essential for making béchamel and greasing the baking dish.
• Flour – A key ingredient for thickening the béchamel; use gluten-free flour if desired.
• Milk – Needed for the béchamel sauce; a dairy-free option works well too.
• Nutmeg – A pinch adds warmth to the béchamel; while optional, it’s highly recommended for depth of flavor.

Now that you have all the ingredients ready, let’s bring the magic of the Croque Monsieur Breakfast Casserole into your kitchen!

Step‑by‑Step Instructions for Croque Monsieur Breakfast Casserole

Step 1: Preheat the Oven
Begin by preheating your oven to 350°F (175°C). This ensures that when your Croque Monsieur Breakfast Casserole is ready to bake, it will cook evenly and efficiently. While the oven warms up, gather all your ingredients and equipment, including a baking dish, whisk, and mixing bowls, to streamline your process.

Step 2: Prepare the Bread
Cut your white bread into cubes, approximately one-inch in size, and spread it evenly on a baking sheet. Place the sheet in the preheated oven and let it dry out for about 10 minutes, being careful not to brown the bread. This step removes excess moisture, helping your casserole achieve the perfect texture when baked.

Step 3: Whisk the Custard
In a large mixing bowl, whisk together the eggs, half and half, and Dijon mustard until well combined and frothy. Allow the bread cubes to cool slightly before transferring them to the bowl, ensuring they soak in the creamy mixture. Let this sit for about 10 minutes, allowing the bread to absorb the custard fully.

Step 4: Layer the Casserole
Grease a spacious baking dish with butter to prevent sticking, then layer half of the soaked bread mixture across the bottom. Evenly distribute the sliced ham and half of the Gruyere cheese over the bread, and gently press it down. Next, add the remaining bread cubes, followed by more ham and the rest of the cheese for a cheesy finish.

Step 5: Make the Béchamel Sauce
In a medium saucepan, melt a generous amount of butter over medium heat. Once melted, whisk in the flour until it turns a light golden color, which should take about 2 minutes. Gradually pour in the milk while stirring continuously, ensuring no lumps form. Cook this mixture until it thickens and bubbles, seasoning it with a hint of nutmeg for added flavor.

Step 6: Assemble and Bake
Pour the luscious béchamel sauce evenly over the assembled casserole, ensuring everything is well coated. Sprinkle the remaining Gruyere cheese on top for that irresistible melty goodness. Place the dish in the oven and bake for 30 minutes, letting the aroma of your Croque Monsieur Breakfast Casserole entice everyone.

Step 7: Broil for Perfection
After 30 minutes of baking, switch your oven setting to broil. Keep a close watch on the casserole as it broils for an additional 5 to 10 minutes, until the top is golden brown and bubbly. This step gives your casserole the perfect crispy crust that contrasts beautifully with the soft, cheesy interior.

Step 8: Serve and Enjoy
Once done, take your Croque Monsieur Breakfast Casserole out of the oven and allow it to rest for a few minutes. This resting period helps the layers settle for cleaner servings. Then, slice into the casserole, serve hot, and relish every gooey, delicious bite that promises a delightful brunch experience.

Expert Tips for Croque Monsieur Breakfast Casserole

Dry the Bread: Ensure the bread is properly dried before soaking. This prevents a soggy casserole, leading to a perfectly balanced texture.
Whisking Technique: Whisk the béchamel vigorously to eliminate lumps. Gradually adding milk while stirring helps achieve a smooth consistency in the sauce.
Layering Order: For even distribution of flavors, layer the casserole carefully. Start with the soaked bread, followed by ham and cheese, and repeat.
Monitor Broiling: Keep a close eye on the casserole while broiling. It can go from beautifully golden to burnt in seconds—an attentive eye is essential!
Chill Before Baking: As a make-ahead option, assemble your Croque Monsieur Breakfast Casserole the night before. Refrigerate it, then bake it fresh in the morning for a warm delight.

How to Store and Freeze Croque Monsieur Breakfast Casserole

Fridge: Store leftovers in an airtight container for up to 3 days. Reheat in the oven or microwave until heated through, ensuring the casserole doesn’t dry out.

Freezer: For longer storage, freeze individual portions wrapped tightly in plastic wrap and then placed in a freezer-safe bag. It can be kept for up to 2 months.

Reheating: Thaw overnight in the fridge before reheating. Warm in the oven at 350°F (175°C) for about 20-25 minutes, or until hot and bubbling.

Make-Ahead Tips: Assembling the Croque Monsieur Breakfast Casserole the night before allows for a stress-free morning. Simply refrigerate and bake when ready!

What to Serve with Croque Monsieur Breakfast Casserole

Elevate your brunch experience with delightful sides that perfectly complement this cheesy, savory breakfast bake.

Fresh Fruit Salad: A colorful mix of seasonal fruits adds a refreshing sweetness that balances the richness of the casserole.
Light Green Salad: Crisp greens tossed with a zesty vinaigrette provide a crunchy contrast, making each bite feel lighter and more vibrant.
Roasted Veggies: Roasted asparagus or cherry tomatoes bring a lovely depth of flavor and healthful warmth, enhancing the dish’s overall appeal.

For drinks, consider Sparkling Water with Lemon: This bubbly refreshment cleanses the palate, making it a delightful companion for your savory casserole. Pairing with a Savory Quiche: The buttery crust and flavorful filling mirror the richness of the casserole, creating a perfect harmony. These additions will not only enrich your Croque Monsieur Breakfast Casserole experience but impress everyone at the table!

Make Ahead Options

These Croque Monsieur Breakfast Casserole preparations are perfect for busy mornings and stress-free brunches! You can assemble the casserole up to 24 hours in advance and refrigerate it, allowing the bread to soak in the custard overnight for even richer flavors. When you’re ready to enjoy, simply preheat the oven, pop it in, and bake as directed. To maintain quality, be sure to cover the dish with foil while baking for the first 30 minutes, then remove it to allow for that golden, crispy top. Leftovers can be stored in the refrigerator for up to 3 days, making this dish not just a meal, but a delicious solution for your busy week ahead!

Croque Monsieur Breakfast Casserole Variations

Feel free to customize this dish and explore delightful twists that will elevate your Croque Monsieur Breakfast Casserole!

Vegetarian Option: Replace the ham with sautéed spinach, mushrooms, or bell peppers for a hearty veggie medley. Each bite offers a burst of fresh flavor that complements the creamy cheese beautifully.
Spicy Kick: For those who love heat, add sliced jalapeños or a sprinkle of red pepper flakes to the egg mixture. The warmth will awaken your senses and add an exciting zing.
Cheese Swap: Swap Gruyere for sharp cheddar or pepper jack for a different flavor profile. Cheddar brings a rich taste, and pepper jack introduces a delightful spice, making each serving uniquely delicious.
Herb Infusion: Mix in fresh herbs like thyme, chives, or parsley into the custard for an aromatic twist. The herbs create layers of flavor that will transport your casserole to new heights.
Gluten-Free Option: Use gluten-free bread and flour to adapt this recipe for a gluten-sensitive diet. It maintains the wonderful textures and flavors, ensuring no one feels left out at the table.
Nut-Free Adaptation: If you have nut allergies, ensure your half and half and other alternatives are nut-free and enjoy this casserole worry-free. It can be just as creamy without jeopardizing anyone’s health.
Bacon Enthusiasts: For a smoky touch, consider crispy bacon bits instead of ham. The saltiness of the bacon pairs wonderfully with the creamy béchamel sauce, creating an indulgent experience.
Breakfast Classics: Add cooked breakfast sausage for that classic morning flavor. The mix of ham and sausage is a delicious way to amp up the protein while keeping the dish hearty.

Once you’ve tried these variations, don’t forget to revisit recipes like the Low Carb Casserole or the Cheese Potato Breakfast for more cozy and hearty options on your brunch table. Enjoy experimenting!

Croque Monsieur Breakfast Casserole Recipe FAQs

What type of bread is best for this casserole?
I recommend using rustic white bread for its structure and flavor, but any sturdy bread can work, like sourdough or even brioche for a sweeter touch.

How long does leftover casserole last in the fridge?
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Just be sure to reheat it gently to keep the texture creamy!

Can I freeze the Croque Monsieur Breakfast Casserole?
Absolutely! To freeze, wrap individual portions tightly in plastic wrap, then place them in a freezer-safe bag. It can stay good for up to 2 months. Just remember to label it with the date for easy reference!

How should I reheat the casserole once it’s frozen?
Thaw overnight in the refrigerator, and then preheat your oven to 350°F (175°C). Wrap the casserole in foil to avoid drying out, and reheat for about 20-25 minutes until it’s hot and bubbling.

What if I have dietary restrictions, like gluten intolerance?
No worries! You can easily modify the recipe by using gluten-free bread and gluten-free flour for the béchamel. It’s a great way to enjoy this delicious casserole without compromising on flavor!

How can I prevent the casserole from becoming soggy?
To avoid sogginess, ensure that your bread is adequately dried out in the oven before soaking it in the custard mixture. This extra step helps maintain that delightful texture when baking!