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Can You Freeze French Onion Soup?

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By Ross Young

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French onion soup is a true classic. It’s rich, indulgent and takes hours upon hours of cooking to get the sweetness out of the onions. So if you’re going to make it, you may as well well a large batch. But, how should you store it?

Can You Freeze French Onion Soup?

Yes, you can freeze French onion soup for up to 3 months. To freeze French onion soup, cool it before portioning it out into thick freezer bags. Once bagged up, seal the bags and place them in the freezer.

Does French Onion Soup Freeze Well? Yes

Can You Refreeze French Onion Soup? No

How To Freeze French Onion Soup

Before freezing French onion soup, there’s one thing you’ll need: a good quality freezer bag (or a few, if you’re freezing it in portions). Don’t opt for cheap bags here. You don’t want the smell of onion soup to escape nor do you want them to leak everywhere!

Got your bags? Then it’s time to get freezing it:

  1. Cool: If you’ve recently cooked the french onion soup, you’ll want to wait for it to completely cool before starting the freezing process. Hot soup won’t freeze well and can melt your container. Remove any cheese or croutons from the soup because they won’t freeze well.
  2. Portion Into Bags: Once your soup has cooled, spoon the desired amount into a freezer bag or a freezer-safe container. Consider separating the soup into smaller bags for individual servings.
  3. Label: Grab a marker and be sure to write the date you’ve frozen the soup on the front of the container so you know how long it’s been there.
  4. Freeze: Place the containers in a convenient spot in your freezer and you’re good to go!

3 Tips for Freezing French Onion Soup

Now you know how to freeze it, we’ve got our 3 top tips which we strongly recommend following when freezing French onion soup to have the best results:

Use Thick Bags
The last thing you want is onion soup leaking all over your freezer. If you’re going to use bags, make sure they’re leak-proof to avoid unwanted leakages and mess. 

Label Clearly
If you’ve frozen a range of soups, you’ll struggle to tell them apart when they’re frozen so make sure you write clear and obvious labels.

Freeze Flat
If you’ve placed the soup in bags, consider laying the bags down to allow the soup to freeze flat. It will help save a bit of space when storing it. Just be careful of any spills!

How Long Can You Freeze French Onion Soup?

As long as you keep your french onion soup in a sealed container in the freezer, it should keep for up to 3 months.

Try to keep the soup in a spot towards the back of the freezer to prevent any unnecessary thawing from the freezer door being open.

How Long Does French Onion Soup Last in the Fridge?

As it has a strong odour, it’s a good idea to store French onion soup in an airtight container in the fridge where it will last for around 3 days.

How Do You Defrost French Onion Soup?

If you plan to eat french onion soup the next day, toss the container in the fridge and allow it to defrost overnight. You can place the container in a warm tub of water if you’d like to have the soup ready the same day.

Or, if you need it quickly, place it in a heatproof bowl and allow it to heat up in the microwave.

Can You Refreeze French Onion Soup?

Although refreezing French onion soup is unlikely to be dangerous, it can impact the flavour drastically.

If you were to refreeze it, the flavour will degrade rapidly and you’ll be left with an unenjoyable, bland soup.

Does French Onion Soup Freeze Well?

French onion soup freezes extremely well.

So feel free to make some extra in your next batch of soup and save it to eat on a rainy day. Keep a side of delicious croutons and some tasty cheese to top off your reheated dish.

You won’t be able to tell the difference between fresh and frozen.

French Onion Soup Freezer Recipe

French onion soup is far from the quickest or easiest soup to throw together… But that’s why it’s perfect for freezing.

You’ll need to forgo the usual crouton and gruyere toppings when freezing it but these can easily be added when it comes to reheating it:

Freezer-Friendly French Onion Soup Recipe

4.0 from 1 vote
Course: Appetizers, LunchCuisine: FrenchDifficulty: Easy


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Cooking time




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Decadent, rich and indulgent… Just 3 words that describe this French onion soup!

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  • 100g Butter

  • 1tbsp Olive Oil

  • 2kg Onions, Thinly Sliced

  • 1tsp Sugar

  • 3 Sprigs Thyme

  • 2 Bay Leaves

  • 3tbsp Plain Flour

  • 250ml White Wine

  • 2.5l Stock

  • Salt

  • Black Pepper


  • Place a large pan over a medium heat and add the butter to melt along with the olive oil. Once sizzling, add the onions to the pan, give them a quick stir and then fry for 10 minutes.
  • Add the sugar, thyme and bay to the pan, give it a stir and then cook over a low heat for another 50 minutes. Keep an eye on them and stir regularly to avoid any onions catching. This low, slow and long cooking process will draw the sweetness out of the onions.
  • Once the onions are completely soft and sweet, sprinkle in the flour and stir to combine.
  • Turn the heat up to medium and pour the wine in, allow it to evaporate a little then add the stock in. Cover the pan and simmer for 20 minutes.
  • You can then serve the soup up with your favourite toppings or you can allow it to cool before portioning into freezer-safe containers.


If you’ve still got questions about freezing French onion soup or soup in general, then these may help:

How Long Does French Onion Soup Last in the Fridge?

When kept in a covered container, French onion soup will last for around 3 days in the fridge. If you want to extend the shelf life much further then the only option is to freeze it!

Can You Freeze Onion Soup?

Yes, it doesn’t have to be French to be suitable for the freezer. Most soups can be frozen, providing that they don’t contain potatoes!

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