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Home » Sandwiches » A guide to the perfect Croque Monsieur

A guide to the perfect Croque Monsieur

Posted May 4, 2021 by Chris Last Updated April 28, 2022

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Here I’ll give you some game changing tips and tricks to making the perfect Croque Monsieur!

two sandwiches on small wooden board with focus on the first at the front

Croque Monsieur

A Croque Monsieur is the definition of ‘simple yet simply delicious’. I know it sounds fancy, but it only requires supermarket ingredients and is SO easy to make!

What is a Croque Monsieur?

For those still wondering, a Croque Monsieur is essentially a hot toasted ham and cheese sandwich. It’s got French origins and was first seen around Cafes in Paris.

Whilst the ingredients are fairly universal, there’s a few different techniques to make it. Today I’ll show you what I deem to be the easiest, and most importantly TASTIEST way to make it! Follow me…

black spatula lifting half croque monsieur with cheese dripping out

Béchamel Sauce

One of the most iconic layers of this sandwich is the béchamel sauce. Here you’ll need the basics to whip up the base of the sauce (butter, flour, milk) then some extra goodies to take it up a few notches:

  • Gruyere – Gruyere is an essential in a Croque Monsieur. Most recipes place this inside the sandwich and leave the sauce without cheese, however I much prefer melting the gruyere through the béchamel (don’t worry, there’s more cheese in the sandwich as well 😛).
  • Nutmeg – This brings out the gorgeous nutty tones of the gruyere.
  • White Pepper – Offers a very gentle background heat. White pepper is a classic addition to béchamel because it blends in better than black pepper.

You’re looking for the sauce to be fairly thick. Too thin and it’ll just seep into the bread and make it soggy. That and it’ll spill out into the pan!

Process shots: melt butter (photo 1), stir in flour (photo 2), whisk in milk and add seasoning (photo 3), melt in gruyere (photo 4).

4 step by step photos showing how to make bechamel sauce for croque monsieur

How to prepare Croque Monsieur

Alrighty, so the béchamel is done and dusted. We’ll use that in just a sec, but first let’s see what you’ll need to make the sandwich itself:

  • Bread – You want something sturdy like a Sourdough and slice it fairly thick. You need to create a ‘strong’ sandwich that’ll hold its structure when all the cheese starts to melt.
  • Butter – You’ll want to spread the outside of the bread just as you would a grilled cheese.
  • Dijon – This goes on the inside of the bread. You only need a slither – a little goes a long way!
  • Ham – Some slices of good quality ham. I recommend folding it in to create a bit of height/texture in the sandwich.
  • Cheese – Yup, more cheese! This time we’re going for slices of Swiss/Emmental cheese.

Process shots: butter bread and flip (photo 1), spread dijon (photo 2), add cheese (photo 3), add ham (photo 4), and more cheese (photo 5), top with bread butter side up (photo 6).

6 step by step photos showing how to make a croque monsieur

How to cook Croque Monsieur

When it comes to cooking the sandwich, here’s how I differ from some techniques you may have seen:

  • Butter – As I mentioned above, I prefer spreading butter on the bread as you would a grilled cheese. Some recipes melt the butter into the pan, but I find that by the time you’ve fried one side all the butter’s been soaked up and the second side essentially fries in a dry pan.
  • Béchamel on top – Some recipes spread the sauce inside the sandwich and/or on top, however in experience this runs the risk of a soggy sandwich. I much prefer spreading the sauce on top of the sandwich to create its very own layer. That way it also goes gorgeously crispy when you broil it!
  • No Bake – There’s absolutely no need to bake your Croque Monsieur. There, I said it. Even if your bread is considerably thick, you just need to fry the sandwich on a fairly low heat to make sure the cheese inside melts.

Once you’ve fried the sandwich and spread it with the sauce, I recommend sprinkling over some parmesan (yes, that’s cheese #3 ) to get a delicious crispy layer on top. Then straight under the grill it goes!

Process shots: add sandwich to pan (photo 1), fry both sides over low-medium heat (photo 2), spread with sauce and sprinkle with parmesan (photo 3), place under grill and broil until golden (photo 4).

4 step by step photos showing how to cook croque monsieur

croque monsieur in a small pan fresh out the girll

Croque Monsieur FAQ

What is the difference between a Croque Monsieur and a Croque Madame?

A Croque Madame is essentially just a Croque Monsieur with a sunny-side-up fried egg on top!

How do you eat a Croque Monsieur?

Don’t judge me, but I use a knife and fork. This sandwich is gooey and outrageously cheesy – you’ll thank me later!

What to serve with Croque Monsieur?

They’re pretty substantial by themselves, but to make it a full meal I recommend serving them Bistro style with a side salad and fries!

Alrighty, let’s tuck into the full recipe for this Croque Monsieur shall we?!

close up of quarter of croque monsieur with silver fork stabbing in showing filling

How to make a Croque Monsieur (Full Recipe & Video)

croque monsieur in a small pan fresh out the girll

A guide to the perfect Croque Monsieur

Here I'll give you some game changing tips and tricks to making the perfect Croque Monsieur!
4.50 from 2 votes
SaveSaved! Print Pin Rate
Course: lunch
Cuisine: French
Prep Time: 10 minutes minutes
Cook Time: 20 minutes minutes
Total Time: 30 minutes minutes
Servings (click & slide): 2 sandwiches
Calories per serving: 797kcal
Author: Chris
Cost per serving: £4 / $5

Equipment

  • Small Pot or Pan & Whisk (for bechamel)
  • Medium Non-Stick Pan & Spatula/Turner (for frying)
  • Sharp Knife & Chopping Board
  • Cheese Grater

Ingredients

Béchamel Sauce

  • 1 cup / 240ml Milk, at room temp
  • 1/2 cup / 50g Gruyere, grated
  • 2 tbsp EACH: Flour, Butter
  • 1/8 tsp EACH: White Pepper, Ground Nutmeg
  • Salt, to taste

Croque Monsieur

  • 4 fairly large slices of Bread, sliced to 1/2" thickness (see notes)
  • 4 - 6 slices of Ham (2-3 slices per sandwich)
  • 4 slices of Swiss Cheese (see notes)
  • 2 tsp Dijon Mustard
  • Butter, as needed
  • 1/3 cup / 30g freshly grated Parmesan, to top

Instructions

  • In a small pot or pan over medium heat melt butter. Stir in flour to form a paste then very gradually pour in milk, whisking as you go to avoid any lumps forming. Stir in salt, white pepper and nutmeg, then stir in gruyere until it fully melts. Remove from heat.
  • Spread 4 slices of bread with butter, then flip over and spread with a thin layer of dijon mustard. Top 2 of the slices with a slice of cheese, then add 2-3 slices of ham. I recommend folding them in to create a bit of height/texture in the sandwich. Top with more cheese, then add bread mustard-side-down (so both sandwiches are buttered on the outside).
  • Add the sandwiches to a non-stick pan over low-medium heat. Fry until they turn deep golden on the bottom with the cheese just starting to melt, then flip and fry the other side until golden.
  • Spread over béchamel sauce (give it a quick stir over heat if you need to loosen it up) then top with a good sprinkling of parmesan. Place under the grill and broil on high until golden and crisp on top.

Quick Demo

Notes

a) Bread - You want a firm loaf of bread, something like a Sourdough. Some varieties of French bread work well too. Just so the béchamel doesn't cause the sandwich to go soggy! If you've only got very soft bread I recommend toasting one side of each of the slices and face them inwards when you stack the sandwich. That way both sides of the bread is toasted and will offer a bit more stability.
b) Making sure it's cooked right through - Some recipes bake the sandwich to finish it off, but if you're frying fairly low and slow it will cook right through no problem. If you notice the bread darkening too quickly before the cheese starts to melt just lower the heat slightly. Grill/broiling will also help finish off the centre too.
c) Cheese - A lot of stores just call it 'Swiss Cheese', but if you're looking for specifics I recommend Emmental or Leerdammer. Gruyere is an absolute must, so do try and get your hands on some (most supermarkets sell it). 
d) Calories - per sandwich assuming 3 slices ham each and 2 tsp butter each:

Your Private Notes:

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Nutrition:

Nutrition Facts
A guide to the perfect Croque Monsieur
Amount Per Serving
Calories 797 Calories from Fat 432
% Daily Value*
Fat 47.98g74%
Saturated Fat 28.002g175%
Trans Fat 0.597g
Polyunsaturated Fat 3.042g
Monounsaturated Fat 13.737g
Cholesterol 160mg53%
Sodium 1656mg72%
Potassium 676mg19%
Carbohydrates 45.7g15%
Fiber 2.1g9%
Sugar 10.49g12%
Protein 45.62g91%
Vitamin A 1472IU29%
Vitamin C 0.3mg0%
Calcium 966mg97%
Iron 3.32mg18%
* Percent Daily Values are based on a 2000 calorie diet.
*Nutrition is based on the absence of salt unless stated as a measurement in the ingredients. Cost is worked out based on ingredients bought from UK supermarkets, then divided by the number of servings. In both instances these values are just for guidance. Please check out my FAQ Page for more info.
Tried this recipe?Be sure to show it off and tag @somethingaboutsandwiches with #somethingaboutsandwiches!

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If you loved this Croque Monsieur recipe be sure to Pin it for later! Already made it or got a burning question? Give me a shout in the comments below!

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Comments

  1. Michael

    June 26, 2024 at 7:31 pm

    4 stars
    even better when turned into
    CM Madame.

    Reply
    • Chris

      August 23, 2024 at 5:54 am

      You could totally do that 🙂 C.

      Reply
  2. Mary

    June 2, 2021 at 8:33 am

    5 stars
    This was absolutely PERFECT!

    Reply

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