French onion soup


French onion soup
This warming onion soup is an emblematic French dish, both in bistro cuisine and home cooking.

This is a very classic version. The long, slow cooking is the secret to revealing its full flavour.
86 K 4.0/5 (35 reviews)
Grade this recipe:
Keywords:
Last modified on: December 30th 2019
For this recipe: Comment Send to a friend Ask me a question Follow Printable Diaporama Video
For 8 people, you will need:

Change to the quantities for:
Change measures:
Times for this recipe
Preparation: 35 min.
Cooking: 1 hour 55 min.
All in all: 2 hours 30 min.
When should you start or finish this recipe?
If you start now, at , you will finish around : ?.Change start time
To finish around 7pm, you'll need to have started before: .Change end time

Step by step recipe


Stage 1 - ⌛ 20 min.
French onion soup : Stage 1
Prepare 700 g onion and chop finely.

Stage 2 - ⌛ 3 min.
French onion soup : Stage 2
In a large saucepan or casserole, melt 50 g butter until it froths.

Stage 3 - ⌛ 1 min.
French onion soup : Stage 3
When the butter is frothing well, add the chopped onions, salt and pepper. Mix well.

Stage 4 - ⌛ 10 min.
French onion soup : Stage 4
Fry the onions on fairly high heat until lightly browned, stirring frequently to stop them burning.

Stage 5 - ⌛ 2 min.
French onion soup : Stage 5
Sieve 50 g flour into the pan.

Stage 6 - ⌛ 5 min.
French onion soup : Stage 6
Mix in and cook until starting to brown, stirring constantly.

Stage 7 - ⌛ 1 min.
French onion soup : Stage 7
Pour in 200 ml dry white wine all at once.

Stage 8 - ⌛ 3 min.
French onion soup : Stage 8
Stir until well mixed.

Leave to cook for 2 or 3 minutes while stirring.

Stage 9 - ⌛ 1 min.
French onion soup : Stage 9
Pour in the chicken stock, made by mixing 2 litres water (hot) with 2 chicken stock cubes.

Bring to the boil.

Stage 10 - ⌛ 1 hour 30 min.
French onion soup : Stage 10
When boiling, turn the heat down to its lowest, cover and leave to cook for 1 ½ to 2 hours.

Stage 11 - ⌛ 5 min.
French onion soup : Stage 11
Meanwhile, butter 4 slices bread and top with grated cheese.

Press the cheese down gently to help it stick to the buttered bread.

Stage 12 - ⌛ 4 min.
French onion soup : Stage 12
Cut the bread into small squares and arrange these on a baking sheet. Brown under the grill (keep an eye on the colour).

Stage 13 - ⌛ 1 min.
French onion soup : Stage 13
When the onion soup is cooked, check the seasoning.

Stage 14 - ⌛ 3 min.
French onion soup : Stage 14
Serve piping hot in large bowls, topped with with the cheese croutons.
Remarks
Use either white or yellow onions, but preferably not red ones, as they are less suitable for the long slow cooking.

At stage 4 of the recipe, there are 2 conflicting schools of thought: some prefer the more traditional method of cooking the onions until they are dark brown, others (like me) only brown them lightly - it's a matter of taste, of course. I remember as a child staying with my grandmother Jeanne. She used to cook her onions until they were really dark and, back then, I loved that.

For the grated cheese, choose whatever you prefer that browns well, such as Comté, Gruyère or even Emmental.
Keeping: Several days in the fridge, covered with plastic film.
Source: Based on a recipe by Gaston Lenôtre.
Nutritional information
Proteins (gr)Carbohydrates (gr)Fats (gr)Energy value (in k-calories)Energy value (in k-joules)
Whole recipe320 RDI=120 %2,410 RDI=230 %140 RDI=20 %1,890 RDI=100 %7,920 RDI: 100 %
Per 100 g9 RDI=4 %70 RDI=7 %4 RDI=1 %60 RDI=3 %240 RDI: 3 %
Per person40 RDI=20 %300 RDI=30 %20 RDI=3 %240 RDI=10 %990 RDI: 10 %
The % figures are calculated in relation to the Recommended Dietary Intake , or RDI of 2,000 k-calories (or 8,400 k-joules) per day for a woman
Possible allergens in this recipe: milk, Gluten, Sulfites
How much will it cost?
  • For 8 people : 4.20 €
  • Per person : 0.55 €

Change currency:

Note: Be careful, these prices are only an estimate, you can consult the table of prices by ingredients used for this estimate.
This recipe uses (among others)
Other recipes you may also like
Rice and peas
Rice and peas
This is a very simple recipe that can made almost entirely with leftovers: chicken, rice and peas.
September 1st 2013147 K4.2 30 min.
Tagliatelle with cockles
Tagliatelle with cockles
In this recipe, the cockles and pasta are prepared separately, then mixed with the sauce at the last minute. The cockles are first cooked quickly, then shelled carefully (I find it unpleasant to have to do this on the plate) and the cooking juices are used to prepare a cream sauce. The tagliatelle are cooked alongside, then the cockles are added with spring onions and the sauce.
June 24th 2018161 K 14.7 2 hours 20 min.
Marinated tuna with herbs
Marinated tuna with herbs
Here is a very simple recipe, preferably for a barbecue or plancha, but could be made in the kitchen. As for any summer-barbecue-backyard recipe, all proportons can be varied according to taste.
February 21th 2011287 K4.3 1 hour 25 min.
Tagliatelle and courgette spaghetti, carbonara style
Tagliatelle and courgette spaghetti, carbonara style
Classic pasta: tagliatelle mixed with courgette "spaghetti", and like for carbonara, with a sauce of egg yolks, cream, lemon juice and fried ham.
February 21th 2011314 K4.7 55 min.
Creamy risotto with diced vegetables and flax seeds
Creamy risotto with diced vegetables and flax seeds
Risotto is one of the great Italian recipes. It's the special way in which rice is cooked and mixed with several other things, which produces this famous dish. One can make different flavour risottos, here is a fairly simple recipe with diced vegetables and flax seeds.
February 21th 2011272 K 14.2 1 hour 50 min.
News list of cooking-ez.com

Sign up to receive the latest recipes (next batch due to be sent on 2026-03-22)

*Your e-mail Your first name or nickname
I am not a leaving thing
Note: We'll never share your e-mail address with anyone else.
Post a comment or question
Posted by:
I am not a leaving thing
The 2 comments already posted on this recipe
  • Adding a little flour will make the soup a little thicker, as the flour acts a little like a roux.
    Posted by jh june 23th 2025 at 19:59 n° 2
  • Why is the flour needed? I hear some people like it there, others hate it...
    Posted by hmijail june 23th 2025 at 13:36 n° 1

Follow this recipe
If you are interested in this recipe, you can "follow" it, by entering your email address here. You will then receive a notification immediately each time the recipe is modified or a new comment is added. Please note that you will need to confirm this following.
I am not a leaving thing
Note: We'll never share your e-mail address with anyone else.
Alternatively: you can subscribe to the mailing list of cooling-ez.com , you will receive a e-mail for each new recipe published on the site.

Back to top of page