Dinner

Croque Monsieur (Bistro-Style) Recipe

Name: Croque Monsieur (Bistro-Style) Recipe
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: French
Ingredients: 2.5 tbsp butter; 2.5 tbsp flour; 1 1/3 cup milk (warmed); 1/8 tsp nutmeg; 1/4 tsp white pepper; 1 tsp dijon mustard; 2 tbsp chives (finely chopped); salt (to taste); 8 slices brioche bread (thick cut); 8 slices ham; 8 oz gruyère (shredded); 4 oz parmigiano reggiano (grated)

ByMaya Arden April 4, 2026April 4, 2026

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Introduction

The Croque Monsieur is a classic French bistro-style sandwich that combines rich béchamel sauce, ham, and melted cheese on thick brioche bread. This recipe brings together creamy, savory flavors perfect for a comforting lunch or light dinner.

Two triangular sandwiches sit on a white plate with a patterned gold and black rim, each sandwich showing three main layers: a light toasted bread base, a middle filling that is slightly visible with a darker color hinting at meat or sauce, and a thick top layer of melted golden-brown cheese that is bubbly and slightly browned on edges. The sandwiches are garnished with finely chopped green herbs scattered on the cheese top, adding contrast and freshness. The plate is placed on a white marbled textured surface, with a wooden board and a small bowl of green herbs partially visible in the background. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

2.5 tbsp butter
2.5 tbsp flour

1 1/3 cup milk (warmed)
1/8 tsp nutmeg

1/4 tsp white pepper
1 tsp Dijon mustard

2 tbsp chives (finely chopped)
Salt (to taste)
8 slices brioche bread (thick cut)

8 slices ham
8 oz Gruyère (shredded)
4 oz Parmigiano Reggiano (grated)

Instructions

Step 1: Make the Béchamel sauce by melting butter in a small saucepan over medium-low heat. Whisk in the flour and cook for about 4 minutes to remove the raw flour taste.
Step 2: Gradually whisk in the warmed milk, continuing to stir until the sauce thickens, about 5 minutes. Stir in nutmeg, white pepper, Dijon mustard, chopped chives, and salt to taste.
Step 3: Preheat your oven to 400°F (205°C) and line a baking sheet with parchment paper.

Step 4: Place 4 slices of brioche bread on the baking sheet and spread the béchamel sauce evenly over each slice.
Step 5: Top the sauce with slices of ham and about 1 ounce of shredded Gruyère per sandwich.
Step 6: Spread the remaining béchamel on one side of the other 4 bread slices. Place these slices sauce-side up on top of the ham and cheese layers to form sandwiches.

Step 7: Sprinkle the tops with the remaining shredded Gruyère and grated Parmigiano Reggiano.
Step 8: Bake the sandwiches for 12-15 minutes until heated through. Then broil for 1-2 minutes until the cheese is bubbling and golden brown. Serve immediately.

Tips & Variations

Use day-old brioche for better texture and less sogginess when baking.

Swap the ham for turkey or smoked salmon for a different flavor variation.
Add a thin layer of Dijon mustard on the bread before assembling for extra tang.
For a Croque Madame, top each sandwich with a fried egg before serving.

Storage

Store leftover Croque Monsieur sandwiches covered in the refrigerator for up to 2 days. Reheat in a preheated oven at 350°F (175°C) for about 10 minutes to restore crispness. Avoid microwaving to prevent sogginess.

How to Serve

Two triangular slices of baked dish are placed on a white plate with a decorative border of small beige, brown, black, and white square patterns. Each slice has a thick top layer of golden-brown melted cheese that looks bubbly and slightly crispy on edges, sprinkled evenly with small chopped green herbs. The crust underneath is visible slightly at the corners, showing a browned texture. The plate rests on a white marbled surface, with a blurred bowl of green herbs in the background and part of a wooden board and silver spoon also visible. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I prepare the béchamel sauce ahead of time?

Yes, you can make the béchamel sauce a day ahead. Keep it covered and refrigerated, then gently reheat and whisk before assembling the sandwiches.

What cheeses work best for this sandwich?

Gruyère is traditional for its meltability and nutty flavor, but Swiss or Emmental are good substitutes. Parmigiano Reggiano adds a sharp finish when grated on top.