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Classic Croque Monsieur baked with Gruyère, ham, and creamy béchamel Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.1 from 47 reviews
  • Author: Kimberly
  • Prep Time: 10 minutes
  • Cook Time: 30 minutes
  • Total Time: 40 minutes
  • Yield: 4 sandwiches
  • Category: Sandwich
  • Method: Baking
  • Cuisine: French

Description

A classic French Croque Monsieur sandwich made with layers of ham and Gruyère cheese, topped with creamy béchamel sauce and baked to golden perfection with a sprinkle of Herbes de Provence. This rich and savory sandwich is perfect for a comforting lunch or brunch.


Ingredients

Béchamel Sauce

  • 3 tablespoons unsalted butter
  • 3 tablespoons all-purpose flour
  • 2 cups milk, scalded
  • ⅛ teaspoon ground nutmeg
  • ¼ teaspoon salt, or to taste
  • ¼ teaspoon white pepper

Sandwich

  • 8 slices thick-cut white bread
  • 1 tablespoon Dijon mustard
  • 12 slices Black Forest ham, thinly sliced
  • 8 ounces Gruyère cheese, shredded
  • 1 teaspoon Herbes de Provence


Instructions

  1. Preheat Oven: Preheat your oven to 425°F (218°C) and line a baking sheet with parchment paper to prepare for assembling and baking the sandwiches.
  2. Make Béchamel Sauce – Melt Butter: In a saucepan over medium-low heat, melt the unsalted butter carefully without browning it.
  3. Add Flour: Whisk in the all-purpose flour into the melted butter and cook for 2 to 3 minutes, stirring constantly to form a roux and cook out the flour taste.
  4. Whisk in Milk: Gradually pour in the warm, scalded milk while continuously whisking until the mixture is smooth and free of lumps.
  5. Season and Thicken: Add ground nutmeg, salt, and white pepper to the sauce and continue cooking, whisking frequently, for about 5 minutes until the béchamel thickens to a creamy consistency.
  6. Taste and Adjust: Taste the béchamel sauce and adjust salt or seasoning as needed to your preference.
  7. Toast Bread (Optional): Lightly toast the slices of thick-cut white bread to add structure to the sandwiches, though this step can be skipped if desired.
  8. Spread Sauces on Bread: Spread béchamel sauce on four slices of the bread and Dijon mustard on the other four slices.
  9. Assemble Bottom Layer: Place the béchamel-coated bread slices béchamel-side down onto the prepared baking sheet.
  10. Add Fillings: Layer shredded Gruyère cheese, thinly sliced Black Forest ham, and more Gruyère cheese evenly over the bottom slices.
  11. Top Sandwich: Place the remaining four bread slices on top with the mustard side down to complete the sandwich layering.
  12. Add Final Topping: Spread the sandwiches with the remaining béchamel sauce, then sprinkle additional shredded Gruyère cheese and a teaspoon of Herbes de Provence over the top.
  13. Bake and Broil: Bake the assembled sandwiches in the oven for 5 to 7 minutes until bubbling, then switch to broil for 2 to 3 minutes or until the tops are golden brown and slightly crispy.

Notes

  • Using thick-cut white bread gives the sandwich a hearty texture but feel free to use brioche or sourdough for variation.
  • Scalding the milk before adding to the béchamel helps in achieving a smooth sauce without lumps.
  • Lightly toasting the bread before assembling prevents sogginess but is optional.
  • Watch carefully during the broiling step to prevent burning the cheese.
  • For a Croque Madame, add a fried egg on top after baking.