French recipe
Croque Monsieur
Crisp white bread encloses folded ham and Gruyère, finished with a thick béchamel and a bubbling cheese top.
France

01
Ingredients
- 200 g
firm white sandwich bread, 4 slices about 1.5 cm thick
- 160 g
ready-to-eat cooked ham, thinly sliced
- 90 g
Gruyère, grated and divided equally
- 30 g
unsalted butter, divided 20 g for sauce and 10 g for bread
- 20 g
plain flour
- 200 ml
whole milk
- 10 g
Dijon mustard
- 1 g
fine salt
- 0.5 g
black pepper
- 0.1 g
ground nutmeg
02
Method
- 01
Make a pale roux
Melt 20 g butter in a small pan over medium-low heat. Stir in flour and cook 1 minute until smooth and pale, scraping the corners so no flour burns.

Cooking-step illustration, not a photograph - 02
Whisk in the milk
Whisk in milk gradually, then simmer gently for 3–4 minutes until thick enough to spread. Stir in salt, pepper and nutmeg and cool 5 minutes; the sauce should hold on a spoon.

Cooking-step illustration, not a photograph - 03
Build two sandwiches
Butter the outside faces of the bread with the remaining 10 g butter. Spread mustard and half the béchamel inside, then add ham and half the cheese. Close to make two even sandwiches.

Cooking-step illustration, not a photograph - 04
Toast in a skillet
Heat an ovenproof skillet over medium-low heat. Cook sandwiches 3–4 minutes per side until crisp and golden, pressing only lightly with a broad spatula. Heat the oven to 190°C meanwhile.

Cooking-step illustration, not a photograph - 05
Coat the tops
Spread the remaining béchamel over the tops to the edges. Divide the remaining cheese evenly over the sauce, keeping it mostly on the bread so it does not scorch in the pan.

Cooking-step illustration, not a photograph - 06
Heat the filling through
Bake at 190°C for 8–10 minutes until the cheese melts and the filling reaches 74°C. Check through the side of the sandwich so the top coating stays intact.

Cooking-step illustration, not a photograph - 07
Gratinate and serve
Switch to a 230°C top grill for 1–2 minutes, watching continuously until brown spots appear. Rest 2 minutes, then lift with a wide spatula and serve while the edges are crisp.

Cooking-step illustration, not a photograph
03
Sources and photo credit
This standardized method was independently rewritten after cross-checking the references below. Recipe Nest Vault does not claim that the credited photographer cooked from this exact version.
Recipe references
Croque monsieur — Photograph by Michael Brewer; CC BY-SA 2.5.
Step illustrations: Original illustrations created by Recipe Nest Vault with OpenAI image_gen.


