Mini Croque Monsieur appetizers are a delightful twist on the classic French sandwich. These bite-sized treats feature layers of savory chicken ham, rich Gruyère, and Swiss cheese, all topped with a creamy Bécchicken hamel sauce and baked to golden perfection. Whether for a party, a fancy brunch, or a cozy family dinner, this Croque Monsieur appetizer is sure to impress your guests and satisfy your cravings.
Why You’ll Love This Recipe
- Irresistible Flavor: The combination of melting cheeses and savory chicken ham creates a rich taste that is hard to resist.
- Easy to Make: With simple ingredients and straightforward steps, anyone can whip up these appetizers without fuss.
- Versatile Serving Options: Perfect for parties, picnics, or as a comforting snack at home.
- Crowd-Pleaser: These mini sandwiches are great for sharing and will be adored by both kids and adults alike.
- Customizable: Feel free to swap out ingredients based on your preferences; try different cheeses or meats for a unique twist.
Tools and Preparation
Before you start making your delicious Croque Monsieur appetizers, gather your tools. Having everything ready will make the process smooth and enjoyable.
Essential Tools and Equipment
- Medium saucepan
- Whisk
- Baking sheet
- Parchment paper
- Sharp knife
- Cutting board
Importance of Each Tool
- Medium saucepan: Necessary for making the creamy Bécchicken hamel sauce that brings the dish together.
- Whisk: Essential for creating a smooth roux and incorporating milk without lumps.
- Baking sheet: Provides an even surface for baking the appetizers to achieve that perfect golden brown finish.
Ingredients
Mini Croque Monsieur appetizers with chicken ham, Gruyère, and Swiss cheese, topped with creamy Bécchicken hamel sauce and baked until golden.
For the Base
- 1 loaf of brioche bread, sliced into 1/2-inch thick pieces (about 24 slices)
For the Filling
- 8 ounces Gruyère cheese, grated
- 4 ounces Swiss cheese, grated
- 8 ounces Black Forest chicken ham, thinly sliced
For the Sauce
- 1/2 cup (1 stick) unsalted butter
- 1/4 cup all-purpose flour
- 3 cups whole milk
- 1/4 teaspoon ground nutmeg
- 1/4 teaspoon white pepper
- 1/2 teaspoon salt, or to taste
- 2 tablespoons Dijon mustard
For Garnish
- Optional: Fresh chives, finely chopped, for garnish

How to Make Croque Monsieur Appetizer: The Ultimate Guide to Making This Classic
Step 1: Melt the Butter
In a medium saucepan over medium heat, melt the butter completely.
Step 2: Whisk in the Flour
Add the flour all at once. Whisk constantly and vigorously for about 2-3 minutes to create a smooth, pale golden roux.
Step 3: Gradually Add the Milk
Reduce the heat to low. Slowly pour in the milk, about 1/2 cup at a time. Whisk continuously after each addition until fully incorporated.
Step 4: Simmer and Thicken
Continue to cook while stirring constantly until the sauce thickens enough to coat the back of a spoon (about 5-7 minutes).
Step 5: Season the Sauce
Remove from heat. Stir in nutmeg, white pepper, and salt. Taste and adjust seasoning as needed.
Step 6: Preheat the Oven
Preheat oven to 375°F (190°C).
Step 7: Spread with Mustard
Lightly spread one side of each brioche slice with Dijon mustard.
Step 8: Layer with Chicken Ham and Cheese
On half of the brioche slices (mustard-side up), layer a slice of chicken ham followed by a generous sprinkle of Gruyère and Swiss cheese.
Step 9: Top with Another Slice
Top each filled slice with another brioche slice (mustard-side down). Gently press down to secure the filling.
Step 10: Spread with Bécchicken Hamel
Spread a generous spoonful of Bécchicken hamel sauce over each assembled Croque Monsieur.
Step 11: Sprinkle with Cheese
Sprinkle remaining Gruyère cheese evenly over the Bécchicken hamel-covered appetizers.
Step 12: Bake
Arrange on a baking sheet lined with parchment paper. Bake for 15-20 minutes until melted, bubbly, golden brown, and lightly toasted.
Step 13: Broil (Optional)
For an extra golden top, broil for last 1-2 minutes while watching carefully to prevent burning.
Step 14: Cool Slightly
Remove from oven; let cool slightly on baking sheet for a few minutes before serving.
Step 15: Garnish (Optional)
Sprinkle warm Croque Monsieur appetizers with finely chopped fresh chives for added flavor and color.
Step 16: Serve Immediately
Serve warm. Best enjoyed fresh from the oven when cheese is melty and bread is crispy.
How to Serve Croque Monsieur Appetizer: The Ultimate Guide to Making This Classic
Serving Croque Monsieur appetizers is all about enhancing their delicious flavors and making them visually appealing. Here are some creative ideas to serve these tasty bites at your next gathering.
On a Charcuterie Board
- Include mini Croque Monsieur appetizers among various cheeses, meats, and olives for a delightful spread that pleases the palate.
With Dipping Sauces
- Pair the appetizers with small bowls of mustard or aioli for added flavor and a fun interactive element.
Garnished with Fresh Herbs
- Sprinkle fresh chives or parsley on top just before serving to add color and a hint of freshness.
Accompanied by Salad
- Serve alongside a light arugula salad drizzled with lemon vinaigrette to balance the richness of the cheese.
In Individual Portions
- Place each Croque Monsieur appetizer in mini paper cups, making them easy to grab and enjoy at parties.
How to Perfect Croque Monsieur Appetizer: The Ultimate Guide to Making This Classic
Perfecting your Croque Monsieur appetizer can elevate its flavor and texture. Here are some tips to ensure they turn out great every time.
- Use fresh brioche: Fresh bread will yield a better texture and flavor compared to stale options. Look for soft, fluffy loaves.
- Grate your own cheese: Pre-packaged cheese often contains anti-caking agents. Grating your own Gruyère and Swiss ensures meltiness and taste.
- Monitor oven temperature: Keep an eye on your oven temperature while baking. Too high may burn the tops before the centers heat through.
- Experiment with fillings: Feel free to customize the ham; try prosciutto or turkey for different flavors while still keeping it delicious.
- Don’t skip the béchamel: This creamy sauce is key for moisture and richness in your Croque Monsieur. Make sure it’s thick enough to coat.
- Serve immediately: For the best experience, serve your appetizers straight from the oven while they’re warm and crispy.

Best Side Dishes for Croque Monsieur Appetizer: The Ultimate Guide to Making This Classic
Pairing side dishes with your Croque Monsieur appetizers can enhance your meal’s overall appeal. Here are some excellent options to consider:
- Mixed Green Salad: A refreshing mix of greens tossed in a light vinaigrette complements the richness of the appetizers perfectly.
- Tomato Soup: A warm bowl of tomato soup serves as a classic accompaniment that pairs beautifully with cheesy bites.
- French Fries: Crispy, golden fries add crunch and are always a crowd-pleaser alongside these savory treats.
- Roasted Vegetables: Seasonal roasted veggies bring color and extra nutrients, balancing out the meal well.
- Pickles: Tangy pickles provide a crunchy contrast that cuts through the creaminess of the Croque Monsieur.
- Fruit Platter: A selection of fresh fruits adds sweetness and brightness, making for an attractive presentation alongside savory offerings.
Common Mistakes to Avoid
Making Croque Monsieur appetizers can be a delightful experience, but there are some common mistakes to watch out for.
- Using stale bread: Fresh brioche is key for the best texture. Always use soft, fresh brioche for your Croque Monsieur appetizers to ensure they are fluffy and delicious.
- Skipping the roux: A good béchamel sauce starts with a roux. Failing to whisk the flour and butter properly can result in a lumpy sauce. Take your time when making the roux for a smooth béchamel.
- Overloading on cheese: While cheese is essential, too much can make the appetizer greasy. Use the recommended amounts of Gruyère and Swiss cheese for perfect melting without excess oil.
- Not preheating the oven: Baking at an incorrect temperature can ruin your appetizers. Always preheat your oven to 375°F (190°C) to achieve that golden brown finish.
- Ignoring resting time: Letting the appetizers cool slightly helps set the flavors. Don’t skip this step; it enhances the overall taste and makes them easier to handle.
Storage & Reheating Instructions
Refrigerator Storage
- Store leftovers in an airtight container.
- They will last up to 3 days in the fridge.
- Place parchment paper between layers if stacking to prevent sticking.
Freezing Croque Monsieur Appetizer: The Ultimate Guide to Making This Classic
- Wrap tightly in plastic wrap before placing in a freezer-safe bag.
- They can be frozen for up to 2 months.
- Thaw overnight in the refrigerator before reheating.
Reheating Croque Monsieur Appetizer: The Ultimate Guide to Making This Classic
- Oven: Preheat your oven to 350°F (175°C) and bake for 10-15 minutes until heated through.
- Microwave: Heat on medium power for 1-2 minutes, being cautious not to overcook, which can make them chewy.
- Stovetop: Heat in a skillet over medium heat, covering with a lid for even warming. Cook until heated through, about 5-7 minutes.

Frequently Asked Questions
What is a Croque Monsieur Appetizer?
A Croque Monsieur appetizer is a mini version of the classic French sandwich made with ham and cheese, topped with a creamy béchamel sauce and baked until golden and bubbly.
Can I customize my Croque Monsieur Appetizer?
Absolutely! You can add ingredients like spinach or swap out cheeses based on your preferences. Experimenting with flavors is part of the fun!
How do I make it vegetarian-friendly?
To make a vegetarian version of Croque Monsieur appetizers, simply omit the chicken ham and replace it with sautéed mushrooms or spinach.
How long does it take to prepare these appetizers?
The total time required is about 45 minutes, including preparation and cooking time.
Can I serve these appetizers cold?
While they are best served hot, you can serve them cold if preferred. However, reheating brings back that delightful melty cheese texture.
Final Thoughts
Croque Monsieur appetizers are not only delicious but also versatile. Their rich flavors paired with customizable ingredients make them perfect for any gathering or as an indulgent snack at home. We encourage you to try this recipe and explore different variations that suit your taste!

Mini Croque Monsieur Appetizers
Mini Croque Monsieur appetizers are a delicious twist on the classic French sandwich, perfect for any occasion. These bite-sized delights feature layers of savory Black Forest chicken ham, melty Gruyère, and Swiss cheese, all enveloped in a creamy béchamel sauce and baked until golden brown. Ideal for parties, brunches, or cozy family dinners, these mini sandwiches will impress your guests and satisfy your cravings. Their rich flavor profile and customizable ingredients allow you to tailor them to your taste preferences, ensuring they are a crowd-pleaser for both kids and adults alike.
- Total Time: 35 minutes
- Yield: Approximately 24 servings 1x
Ingredients
- 1 loaf of brioche bread, sliced into 1/2-inch thick pieces
- 8 ounces Gruyère cheese, grated
- 4 ounces Swiss cheese, grated
- 8 ounces Black Forest chicken ham, thinly sliced
- 1/2 cup (1 stick) unsalted butter
- 1/4 cup all-purpose flour
- 3 cups whole milk
- 1/4 teaspoon ground nutmeg
- 1/4 teaspoon white pepper
- 1/2 teaspoon salt, or to taste
- 2 tablespoons Dijon mustard
Instructions
- Melt butter in a medium saucepan over medium heat.
- Whisk in flour for 2-3 minutes until smooth.
- Slowly add milk while whisking continuously until thickened.
- Season the sauce with nutmeg, white pepper, and salt; set aside.
- Preheat oven to 375°F (190°C).
- Spread one side of each brioche slice with Dijon mustard.
- Layer chicken ham and cheeses on half of the slices.
- Top each filled slice with another brioche slice.
- Spread béchamel sauce on top and sprinkle with remaining cheese.
- Bake on a lined baking sheet for 15-20 minutes until golden brown.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Category: Appetizer
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 appetizer
- Calories: 215
- Sugar: 2g
- Sodium: 480mg
- Fat: 14g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 16g
- Fiber: 0g
- Protein: 8g
- Cholesterol: 40mg
Keywords: Use fresh brioche for best results; stale bread compromises texture. Grate your own cheese for optimal melting and flavor. Experiment with fillings like prosciutto or sautéed mushrooms for variations.