A very delicious French onion soup recipe recipe (2024)

I have been craving a proper French Onion soup like the ones I had in Paris 2 years ago. Where the onions are caramelized to rib-sticking unctuousness. I wanted the bread on top of my soup to be thick, soak up the liquid, and so heavily laden with Gruyere that when grilled, it bubbles over the side.

So I made this delicious soup using one of my first two loaves of sourdough bread after nurturing a starter since the beginning of lockdown. All the key elements are in place. This is my to-date best French Onion soup recipe and I cooked part of it in my Instant Pot to speed it up, but you can just as easily let it simmer on the stovetop.

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I used two cookbooks as my inspiration for this recipe. The first is Melissa Clark’s Dinner in an Instant and Chad Robertson’s Tartine Bread. The latter is a baking bible for the making of sourdough and a selection of recipes from the famous San Francisco bakery with the same name.

I adjusted the quantities of ingredients from Melissa and used less stock (to keep it more oniony), added more onion (for obvious reasons), more sherry (because this soup needs a decent hit of booze), and a little more fat to get things going at the start.

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The Tartine recipe used cream which I loved the sound of, and they added it at the start allowing the Maillard reaction to really set in and get the milk proteins to caramelize. I was a little more cautious with this and added the cream later on, but next time I might allow this to cook a little longer.

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When it comes to soup especially one like French onion soup where there are few ingredients, the quality of the stock is important. I was lucky I had frozen farm bone broth and chicken stock from Terra Madre on hand and I loved the combination of beef and chicken here. I would suggest using either chicken or beef stock (or a combination of the two) as it adds a level of richness to this soup.

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If you are vegetarian then use a really good quality vegetable stock obviously. If you can get your hands on fresh or frozen stock then all the better and for me, it’s worth going out of the way to source these ingredients as this is not a soup you would make every day.

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You can see my list of the best food shops in Cape Town to source suppliers, but off the top of my head, Giovanni’s in Greenpoint, Sans in Sea Point, The Olive Branch Deli in Town, Farmer Angus at Spier, Son of a Butcher in Sea Point & OZCFM, Buyfrsh online deli & Terra Madre in Elgin (online).

More recipes you might like in an Instant Pot:

Vietnamese caramel salmon

Confit duck legs with cherry sauce

Lamb shanks with red wine rosemary and bay

A very delicious French onion soup recipe recipe (6)
A very delicious French onion soup recipe recipe (7)
A very delicious French onion soup recipe recipe (8)

This recipe makes enough for 2 big bowls of French Onion Soup so double up if you want to make more.

A very delicious French onion soup recipe

A classic and delicious French onion soup recipe made on the stovetop and in an Instant Pot.

Print Recipe

A very delicious French onion soup recipe recipe (9)

Prep Time:10 minutes mins

Cook Time:45 minutes mins

Ingredients

  • 2 Tbsp olive oil
  • 3 Tbsp butter
  • 3 large white onions cut to about 3-4mm/ 1/8th inch thick rounds you can slice these in a food processor to make it easier or on a mandolin
  • 1 large sprig of Thyme
  • 1 tsp flour
  • ¼ cup pale dry sherry you could use ½ cup dry white wine instead
  • ½ cup cream
  • 750 ml good quality chicken stock or bone broth or half beef and half chicken
  • Salt & white pepper I love white pepper here
  • 2 thick slices of sourdough or one large slice cut in half it's important to use a sturdy bread here
  • 1 clove garlic optional
  • ¾ - 1 cup grated Gruyere cheese or a strong local hard cheese such as Dalewood Fromage Hugeonot

Instructions

  • Heat the butter and olive oil in a medium-large heavy-based pot and sauté the onion with the thyme for about 10 minutes.

  • Add the flour, season well with salt & pepper and cook for a minute.

  • Add the sherry to deglaze the pan and cook for a further 1 - 2 minutes.

  • Add the cream and allow this to cook for about 4 – 5 minutes until it's really thick and most of the liquid has cooked off.

  • Add 1 cup of stock and cook for about 2 minutes once again scraping down the pot.

  • To cook in an Instant Pot: Add this mix to the bowl of the Instant pot with the remaining 500ml of stock and cook on high for 10 minutes. Release the pressure manually. Remove the thyme stalk.

  • To cook on the stovetop: add the remaining 500ml of stock to the pot and carry on cooking this over low heat for about 30 minutes. Remove the thyme stalk.

  • When you are ready to serve, preheat your ovens grill/ broiler. Place the bread on a baking sheet and toast on either side for about 2 – 3 minutes until it is a light golden colour. Remove and rub the garlic clove over the toast (optional).

  • Dish up the soup in 2 ovenproof dishes to just below the rim. Place a slice of toast on each soup and then top with the grated cheese.

  • Place this in the oven about 1/3 of the way down (so not directly under the grill) and grill until the cheese is golden and bubbling and serve. If your oven has a fan and grill setting you can use this combination to keep the soup piping hot.

Servings: 2

Author: Sam Linsell

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A very delicious French onion soup recipe recipe (2024)

FAQs

How do you deepen the flavor of French onion soup? ›

A few sprigs of thyme and a bay leaf elevate the soup even more, but I take it a step further, adding a splash of fish sauce for complexity and depth—don't worry, it won't taste fishy—and a hit of cider vinegar to balance some of that oniony sweetness.

Why do you put baking soda in French onion soup? ›

The caramelized onions for this soup cook more quickly due to a pinch of baking soda but still have that deep, slow-cooked flavor. Topping the soup with hot, cheesy toasts prepared while the soup simmers, eliminates the need to bake the soup in specialty French onion soup bowls.

Are red or yellow onions better for French onion soup? ›

Onions: You can use white, yellow or red onions for French onion soup. But to make it the classic way, you will need 5-6 large yellow onions, peeled and thinly sliced. Butter: The tastiest (French) way to caramelize those onions.

What is the difference between French onion soup and onion soup? ›

What is the Difference Between Onion Soup and French Onion Soup? French onion soup is always made with beef stock. Other onion soups can be made with chicken, vegetable, or beef stock. Additionally, French onion soup typically contains wine or sherry, which isn't typical or necessary in other onion soups.

What is the best wine to use for French onion soup? ›

Wine is optional to deglaze the pan and add flavour to the soup. I recommend a dry white or red wine, such as a good quality Pinot Grigio/Gris, Sauv Blanc, Sémillon, Chardonnay, Merlot or Pinot Noir. Generally, if you can't drink it, don't cook with it.

What is missing from my French onion soup? ›

Insufficient caramelization: The key to a flavorful French onion soup lies in properly caramelizing the onions. If the onions are not cooked long enough or over low heat, they won't develop the sweet and rich flavor that is characteristic of this soup.

What's the best kind of bread to use for French onion soup? ›

Bread: I use toasted slices of French baguette rubbed with a bit of fresh garlic to make them extra delicious before adding them to my soup. It's the best! Cheese: The best cheese for French onion soup is Gruyère. It melts beautifully and tastes earthy and nutty, which works nicely with the savory soup base.

What bowls are best for French onion soup? ›

French onion soup is traditionally served in lionhead bowls, which are deep but not very wide porcelain bowls. Here are four reasons why these bowls are perfect: Plenty of soup. Even as the bread on top starts to soak up some of the soup, there's still plenty left underneath.

Which potatoes are best for soup? ›

Russets or all-purpose baking potatoes are high in starch and low in moisture. In soups, they will soak up the liquid and lose their shape. This makes them the ideal choice for making creamy soups or thickening a runny soup. Try using Russet potatoes to create the perfect Loaded Potato Soup.

How to thicken French onion soup? ›

The easiest way to thicken your French onion soup is with flour. You can also use cornstarch if you don't have any flour. Remember to never add the flour or cornstarch directly to the soup – otherwise you run the risk of it clumping.

What broth is French onion soup made of? ›

What Is French Onion Soup? French onion soup, or soupe à l'oignon gratinée, is a classic French dish made with caramelized onions and beef stock or broth. The soup is topped with bread and cheese, then gratinéed to rich, gooey perfection.

Why is French onion soup so expensive? ›

First, French onion soup calls for a ton of onions. While onions aren't expensive, there's a lot of labor involved in halving, peeling, and slicing 10, 12, 50, or one billion onions (I don't know how much soup you make).

How do you make French onion soup less bland? ›

Most likely it could be from not caramelizing the onions long enough, as this is crucial for flavor development. Also, be sure to use a good quality broth and season the soup properly with salt and pepper. You can try adding a splash of balsamic vinegar or Worcestershire sauce for a boost of flavor.

How do you get depth of flavor in soup? ›

"If your broth is lacking in savory richness, try adding roasted onion, tomato paste, mushrooms, seaweed, soy sauce, or miso. These ingredients add umami flavor and depth to broth," she says. The choice of ingredient depends on the recipe, though.

How do you doctor up canned French onion soup? ›

To elevate the canned version, quickly saute fresh onions, instead. Cook the thinly sliced onions in butter until they start to soften and take on a golden brown color, which indicates their sweet taste. The process only takes a few minutes and infuses French onion soup with a rich, decadent taste.

How do I make my French onion soup darker? ›

The caramelized onions are what give the soup its rich dark flavor and color, so don't skimp! Use a good quality beef broth. We use Better Than Bouillon to make our beef broth because it's extremely flavorful and contains a decent amount of salt, which seasons the soup well.

References

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