Croque Monsieur Casserole Recipe for a Savory French Brunch

Croque Monsieur Casserole puts all the magic of the classic French café sandwich into an easy-baked format that feeds a crowd beautifully.

Perfect for brunch gatherings or lazy weekend mornings, it evokes comfort and elegance in equal measure.

Rich flavors meld together as golden edges bubble and crisp in the oven.

Everyone at the table will appreciate how satisfying and special it feels without requiring you to stand over a stovetop making individual sandwiches.

The dish works wonderfully for holidays, potlucks, or any occasion when you want to serve something memorable.

Simple preparation means more time enjoying company and less stress in the kitchen.

Pull up a chair and make room for seconds!

Reasons to Make Croque Monsieur Casserole

• Easy Breakfast Hero: This casserole transforms classic French sandwich ingredients into a crowd-pleasing morning meal that saves your sanity during busy weekends.
• Crowd-Pleaser Potential: Everyone from kids to grandparents will appreciate the comforting blend of ham, cheese, and eggs – perfect for family gatherings or weekend brunches.
• Make-Ahead Magic: Prepare the entire dish the night before and pop it in the oven when your guests arrive, giving you more time to enjoy morning conversation.
• Pantry-Friendly Recipe: Using simple ingredients like English muffins, ham, and eggs means you can probably make this without a special trip to the grocery store.

Ingredients to Prepare for Croque Monsieur Casserole

• Sourdough English Muffins (6): Cut into cubes to form the hearty foundation of your casserole.

• Deli Sliced Ham (1/2 pound): Adds a classic, savory flavor to your breakfast dish.
• Large Eggs (8): Create a rich, custardy texture that binds the casserole together.

• Swiss Or Gruyere Cheese (3 cups): Provides a creamy, nutty melted cheese layer.
• Parmesan Cheese (3 tablespoons): Sprinkled on top for a golden, crispy finish.

• Half-And-Half (1 1/4 cups): Ensures a smooth, creamy egg mixture.
• Milk (2 cups): Helps create a silky sauce consistency.

• Kosher Salt (1 1/2 teaspoons), Freshly Ground Black Pepper (3/4 teaspoon): Enhance the overall flavor profile.
• Dijon Mustard (2 tablespoons): Adds a subtle tangy kick.
• Nutmeg (1/8 teaspoon): Provides a delicate, warm undertone.

• Butter (10 tablespoons): Adds richness and helps prevent sticking.
• All-Purpose Flour (4 tablespoons): Helps thicken the sauce and create a smooth texture.

Tools and Equipment for Croque Monsieur Casserole

• 9×13 Inch Baking Dish: Your go-to pan for creating this cheesy, layered casserole with perfect edges and even cooking.
• Whisk: Essential for blending eggs, half-and-half, and seasonings into a smooth, silky mixture.
• Large Mixing Bowl: Spacious bowl for combining egg mixture and preparing casserole ingredients.
• Sharp Chef’s Knife: Needed to cube English muffins and slice ham into perfect bite-sized pieces.
• Cutting Board: Sturdy surface for preparing ingredients without damaging your countertop.
• Measuring Cups and Spoons: Precise tools to ensure accurate ingredient quantities for a balanced flavor.
• Cheese Grater: Helpful for grating Parmesan cheese to sprinkle on top of the casserole.
• Aluminum Foil: Used to cover the casserole during initial baking for even cooking.

How to Make Croque Monsieur Casserole

Which Tips Keep Croque Monsieur Casserole Crispy

• Choose high-quality ham for maximum flavor that makes your casserole taste restaurant-worthy.
• Lightly toast your English muffins before cubing to help them absorb the egg mixture without getting soggy.
• Distribute cheese evenly across each layer so every bite delivers rich, melty goodness.
• Whisk your eggs thoroughly to create a smooth, creamy base that binds everything perfectly.
• Watch carefully during the final uncovered baking stage to prevent burning and achieve golden perfection.

Which Croque Monsieur Casserole Variations to Try

• Gluten-Free Version: Swap English muffins with gluten-free bread cubes, ensuring your celiac friends can enjoy this hearty breakfast casserole just as much.
• Vegetarian Swap: Replace ham with sautéed mushrooms or spinach, giving the casserole a delicious plant-based protein punch that keeps the dish satisfying.
• Low-Carb Alternative: Use cauliflower florets instead of English muffins to cut down on carbs while maintaining the same cheesy, eggy comfort you crave.
• Spicy Breakfast Kick: Add diced jalapeños or red pepper flakes to the egg mixture for a zesty morning meal that wakes up your taste buds.

Best Serving Approach for Croque Monsieur Casserole

• Serve Warm and Fresh: Pull this casserole straight from the oven when your guests are ready to eat, keeping the cheese melted and texture perfect.
• Pair with Light Salad: Complement the rich casserole with a crisp green salad dressed in a tangy vinaigrette to balance the dish’s creamy flavors.
• Weekend Brunch Champion: Make this casserole the star of your weekend gathering, preparing it ahead so you can relax with friends during breakfast.
• Wine Suggestion: Serve with a chilled, dry white wine like Sauvignon Blanc to cut through the richness and enhance the meal’s French-inspired profile.

Best Ways to Store Croque Monsieur Casserole

• Refrigerate leftovers in an airtight container for up to 3 days, making sure to seal it tightly so your casserole stays fresh and doesn’t absorb other fridge flavors.
• Reheat individual portions in the microwave for 1-2 minutes, covering with a damp paper towel to keep the edges from getting tough and dry.
• Warm the whole casserole in the oven at 350°F for about 15-20 minutes, which helps restore the crispy top and keeps the texture closer to when it was first baked.
• Freeze portions wrapped in plastic wrap and aluminum foil for up to a month, thawing overnight in the refrigerator before reheating for the best texture and flavor.

Croque Monsieur Casserole FAQ Breakdown

Croque Monsieur Casserole Recipe

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4.9 from 20 reviews

• Total Time: 50 minutes
• Yield: 6 to 8 1x

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Description

Croque monsieur brings French café comfort straight to your kitchen table, delivering pure cheesy ham happiness in one simple baking dish. Layers of crusty bread, melted gruyère, and savory ham create a delightful breakfast or brunch favorite that feels like a warm culinary hug from Paris.

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Ingredients

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Main Ingredients:

• 6 sourdough English muffins
• 8 large eggs
• ½ pound deli sliced ham
• 3 cups grated Swiss or Gruyere cheese

Wet Ingredients and Binding Agents:

• 2 cups milk
• 1 ¼ cups half-and-half
• 10 tablespoons butter
• 4 tablespoons all-purpose flour
• 2 tablespoons Dijon mustard

Seasonings and Finishing Touches:

• 1 ½ teaspoons kosher salt
• ¾ teaspoon freshly ground black pepper
• ⅛ teaspoon grated nutmeg
• 3 tablespoons freshly grated Parmesan cheese

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Instructions

1. Warm your oven to 375°F and generously coat a 9×13-inch baking dish with 2 tablespoons melted butter. This ensures your casserole won’t stick.
2. Slice 6 sourdough English muffins into 1-inch cubes. Spread the cubes evenly across the buttered baking dish.
3. Layer ½ pound deli sliced ham over the muffin cubes. Sprinkle 2 cups of grated Swiss cheese across the ham.
4. Whisk 8 large eggs with 1 ¼ cups half-and-half, 2 tablespoons Dijon mustard, 1 teaspoon kosher salt, and ½ teaspoon black pepper until smooth.
5. Pour the egg mixture carefully over the ham, muffin cubes, and cheese. Press down gently to help muffins absorb the liquid.
6. Prepare the bechamel sauce by melting 4 tablespoons butter in a saucepan over medium heat. Whisk in 4 tablespoons flour until smooth.
7. Gradually add 2 cups milk to the butter-flour mixture, stirring constantly. Cook for 3-4 minutes until the sauce thickens.
8. Stir ½ teaspoon kosher salt, ¼ teaspoon black pepper, and ⅛ teaspoon nutmeg into the bechamel sauce.
9. Pour the bechamel evenly over the casserole. Top with remaining 1 cup Swiss cheese and 3 tablespoons Parmesan.
10. Cover with foil and bake at 375°F for 30 minutes. Remove foil and bake an additional 15-20 minutes until golden and puffy.

Notes

• Swap English muffins with day-old sourdough or brioche for extra flavor and texture.
• Let the casserole rest 10 minutes after baking to help it set and make slicing easier.
• For a vegetarian version, replace ham with sautéed mushrooms or spinach for a hearty alternative.
• Using room temperature eggs helps create a more consistent and smoother egg mixture when whisking.

• Prep Time: 15 minutes
• Cook Time: 35 minutes
• Category: Casseroles
• Method: Baking
• Cuisine: French

Nutrition

• Serving Size: 6 to 8
• Calories: 450 kcal
• Sugar: 4 g
• Sodium: 720 mg
• Fat: 32 g
• Saturated Fat: 18 g
• Unsaturated Fat: 12 g
• Trans Fat: 0.5 g
• Carbohydrates: 20 g
• Fiber: 1.5 g
• Protein: 28 g
• Cholesterol: 210 mg