frenchlunch
Croque Monsieur
France's greatest grilled cheese — ham and Gruyère between buttered bread with a golden béchamel crust.
Prep
10 min
Cook
15 min
Servings
2
Difficulty
Easy
4.7
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France's greatest grilled cheese — ham and Gruyère between buttered bread with a golden béchamel crust.
The croque monsieur — roughly 'Mr. Crunch' — is the grilled ham and cheese sandwich elevated to French café art. What separates it from every other toastie is the béchamel: a nutmeg-scented white sauce enriched with Gruyère, spooned over the assembled sandwich and grilled until it caramelises into a golden, bubbling, blistered crust. Inside, good cooked ham and more Gruyère melt together against a whisper of Dijon mustard, all held by buttery pan-toasted bread. It has been a fixture of Parisian café menus since 1910, eaten at zinc counters with a green salad and a glass of wine. Crown it with a fried egg and it becomes a croque madame. Deceptively simple, devastatingly delicious, and a fifteen-minute masterclass in French technique.
Serves 2
Melt the butter over medium heat, whisk in the flour, and cook the roux for a full minute to lose the raw flour taste. Add the warm milk gradually, whisking constantly to keep it lump-free, and cook about 5 minutes until thick enough to coat a spoon. Season with salt, pepper, and nutmeg, then stir in 50g of the Gruyère off the heat.
Warm milk into a hot roux is the lump-proof combination; cold milk into hot roux invites trouble.
Butter one side of each bread slice — this is the outside. Spread Dijon on the unbuttered faces of two slices, then layer the ham in loose folds rather than flat sheets so it stays tender, followed by a generous handful of Gruyère. Close with the remaining bread, butter-side out.
Cook the sandwiches in a skillet over medium heat, about 3 minutes per side, pressing gently with a spatula, until both faces are evenly golden and the cheese inside has begun to melt. Medium heat matters: too hot and the bread browns before the interior warms.
A heavy pan or small pot set on top acts as an improvised press for even, café-style browning.
Transfer the sandwiches to a baking sheet, spoon the béchamel thickly over the tops right to the edges, and scatter with the remaining Gruyère. Slide under a hot grill/broiler for 3–4 minutes until the surface is bronzed, bubbling, and blistered in spots. Serve immediately with a sharply dressed green salad.
Watch constantly under the broiler — the line between burnished and burnt is about thirty seconds.
The béchamel on top is what separates a croque monsieur from a basic grilled cheese — don't skip it.
Gruyère is non-negotiable for authentic flavour; Emmental or Comté are the closest substitutes.
Use a sturdy, tight-crumbed bread like pain de mie — airy sourdough lets the béchamel soak through.
Fold the ham loosely instead of laying it flat; the pockets of air keep it tender and let cheese melt between layers.
Make the béchamel ahead and refrigerate it — it spreads even better cold and saves time at lunch.
Croque Madame: top with a fried egg — the runny yolk becomes part of the sauce.
Croque Provençal: add tomato slices inside for acidity against the richness.
Croque Norvégien: swap the ham for smoked salmon and add a little dill to the béchamel.
Croque Auvergnat: use blue cheese alongside the Gruyère for a punchy mountain version.
Best eaten immediately while the béchamel crust is hot and crisp. Make components ahead instead: béchamel keeps refrigerated 3 days and the sandwiches can be assembled a few hours in advance, then pan-fried and grilled to order.
The croque monsieur first appeared on a Parisian café menu around 1910, reputedly on the Boulevard des Capucines, and Proust name-checked it in 1918's In Search of Lost Time. The name likely references the satisfying crunch ('croquer') of the toasted bread, though playful legends about the café owner's claims regarding the meat persist. It became a defining staple of French café culture throughout the 20th century.
Yes — pan-fry the sandwich first so the bread toasts properly in butter, then top with béchamel and cheese and air-fry at 180°C for about 4 minutes. The circulating heat bronzes the sauce nicely. Going air-fryer-only from raw works in a pinch, but you lose the buttery pan-fried base that defines the sandwich.
One fried egg. The croque madame is simply a croque monsieur crowned with a sunny-side-up egg, whose runny yolk mingles with the béchamel into an even richer sauce. The name supposedly comes from the egg resembling a lady's wide-brimmed hat. Everything else — the ham, Gruyère, béchamel, and grilling — is identical.
You can, but then you've made a very good grilled cheese, not a croque monsieur. The béchamel is the dish's signature: it caramelises under the grill into a creamy, golden crust no melted cheese alone can replicate, and it keeps the top of the sandwich lush rather than dry. It takes only ten minutes — make it.
Good-quality cooked ham — jambon de Paris is the French standard: mild, moist, and thinly sliced. A quality deli ham off the bone is the best substitute. Avoid smoked or honey-glazed hams, which fight the nutmeg in the béchamel, and skip dry-cured hams like prosciutto, which turn salty and tough when grilled.
Per serving (400g / 14.1 oz) · 2 servings total
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