Best French Onion Soup Recipe, Whats Cooking America (2024)

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Lyonnaise-Style Onion Soup – Soupe l’Oignon

French Onion Soup is one of my favorite winter treats – to be honest,I can thoroughly enjoy this soup any time of the year. The wonderful golden onions and melted cheese are the center of this classic French onion soup recipe.

This is a classic French Onion Soup recipe. The base of the soup is simple as it is made by caramelizing onions until they are deliciously sweet and golden brown. For best flavor, make the soup two days in advance. I have to admit that it does take a bit of time to make, as it takes time to properly caramelize the onions, but it is so worth the effort to break your spoon through the melted cheese to reach to reach your reward of those sweet onions!

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Best French Onion Soup Recipe:

Prep Time

35 mins

Total Time

1 hr 20 mins

Course:Soup

Cuisine:French

Keyword:French Onion Soup Recipe, Lyonnaise-Style Onion Soup Recipe

Servings: 6 servings

Author: What's Cooking America

Ingredients

  • 4tablespoonsunsalted butter
  • 5mediumyellow onionsor red onions (about 3 pounds), peeled and sliced thin*
  • 1/2teaspooncoarse salt
  • 6cups cannedchicken stockor broth (low-sodium)
  • 1 3/4cups cannedbeef stockor broth (low-sodium)
  • 1/4cupdry white wine(or red, your choice - you could even use sherry)
  • 2sprigsparsley,fresh
  • 1sprigthyme,fresh
  • 1bay leaf
  • 1tablespoonbalsamic vinegar(good-quality)
  • Saltand black pepper
  • 1baguette(French, Italian-style, or country-style), cut on the bias into 3/4-inch slices - 2 to 3 per serving***
  • 4 1/2ouncesSwiss cheeseor Gruyere cheese, sliced 1/16-inch thick
  • 3ouncesAsiago cheese,grated

Equipment Needed:

  • 6(12-ounce)soup bowlsthat are oven and broiler safe

Instructions

  1. Cut off the stem and root ends of the onions, then halve then lengthwise, and peel away the dried skin. Cut the onions into 1/4-inch slices. It is important to have all the onion slices roughly the same size so they cook evenly.

    Best French Onion Soup Recipe, Whats Cooking America (2)

  2. Stove Top: Melt butter in large soup kettle or Dutch oven over medium-high heat. Add sliced onions and 1/2 teaspoon salt, stirring to coat onions thoroughly with butter. Cook, stirring frequently, until onions are reduced and syrupy and inside of pot is coated with very deep brown crust, approximately 30 to 35 minutes.

  3. Oven: You can also caramelize the onions in the oven. Please check out my article on Baked Caramelized Onions. This oven method cuts down on the cooking and stirring time required when you caramelize on your stove top.

    Best French Onion Soup Recipe, Whats Cooking America (3)

  4. Stir in chicken and beef broths, wine, parsley, thyme, and bay leaf, scraping pot bottom with wooden spoon to loosen browned bits; bring to simmer. Simmer to blend flavors, approximately 30 minutes. Remove herbs and discard. Stir in balsamic vinegar and adjust seasonings with salt and pepper to taste. At this point, the soup can be cooled to room temperature and refrigerated in an airtight container up to 2 days. To use, return to simmer before finishing soup with croutons and cheese.

  5. Preheat oven to 400 degrees F. While the soup simmers, arrange the baguette slices in single layer on baking sheet and bake until the bread is dry, crisp, and golden at edges, about 10 minutes (watch carefully so they do not burn). Toasting the bread slows down the process of the bread getting soggy in the hot soup. Set aside until ready to use.

  6. When ready to serve the onion soup, adjust oven rack to upper middle position; heat the broiler.

  7. Set onion soup bowlson baking sheet and fill each with about 1 1/2 cups soup. Top each bowl with two (2) toasted baguette slices(do not overlap the bread)and divide Swiss cheese slices, laying them in a single layer on top of the bread.

  8. I like to let the slices overlap the edge of the dish. It keeps the grated cheese from falling down into the soup, and looks cool when all brown andgooey. Remember, if you can see soup beneath, then you need more cheese.

  9. Sprinkle the top of each with about 2 tablespoons grated Asiago cheese. Place the bowls into the oven, about 5 to 6 inches from the broiler and let broil until cheese is brown and bubbly, about 10 minutes.

  10. Tip:For an onion soup not to collapse, the soup bowl has to be filled to the rim with the onion soup and the bread. The cheese layer should cover the whole surface, so it will stick to the sides and corm a crust that holds its shape and does not sink.

  11. Remove from oven and serve immediately. Let your guests know that the soup is really hot!

  12. Makes 6 servings.

Recipe Notes

* Onions are the essence of French Onion Soup's delicate flavor. You can use any large onion variety, but the yellow (brown-skin) onions are cheaper and actually work the best. Some onions caramelize more quickly than others, and the standard yellow onion (brown-skin) actually contains more sugars than "sweet" onions. Cooking them slowly will bring out the most flavors. Learn how easy it is to makeBaked Caramelized Onions(this is how I like to caramelize onions - so easy to do).

** Learn how easy it is to make homemadeChicken StockandBeef Stock. If possible, use only homemade stock in this French Onion Soup Recipe. You will be delighted with the outstanding taste of this soup.

*** Slice the bread on the bias (this means on an angle, as this will give you slices with more surface area). Depending on the size of the bread loaf and the size of your serving dishes, you will need 12 to 24 slices. You want the whole surface of your soup covered.

Source: I have adapted this recipe from the Cook’s Illustrated Magazine, January & February, 1999.

Related Recipes

Categories:

Balsamic Vinegar French Recipes International Regional Foods Onions Other Cheeses: Cheddar, Gruyere, Fontina, Monterey Jack, Gouda, Manchero, Queso Cheese, etc.

Comments and Reviews

5 Responses to “Best French Onion Soup Recipe”

  1. CJ

    Looks yummy! Will need to give this a try!!

    Reply

  2. Kim

    Can you freeze this?

    Reply

    • Whats Cooking America

      You can freeze the soup base and then reheat and bake in the oven to melt the cheese on top.

      Reply

  3. Dayna Plov

    This recipe was great. My husband is not a fan of French onion soup, he really liked this one. I used smoked Edam and Swiss cheese.. I used the tips on how to place the bread and cheese, it worked perfect.

    Reply

  4. Charlene marino

    made this last night and it was the best I have ever made ! thanks for posting this !

    Reply

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Best French Onion Soup Recipe, Whats Cooking America (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.

What's the difference between French onion soup and American 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.

Should French onion soup be thick or thin? ›

Made slightly thicker than most watered down soups because every mouthful NEEDS a slightly thickened texture to compliment the caramelized onions.

How do you make soup taste stronger? ›

Perk up a Bland Soup With Simple Pantry Staples

Add a splash of vinegar (any kind!), or a squeeze of citrus. Chances are, you could use a little more salt. Go ahead—it's ok. Salt perks up flat flavors and helps balance out bitter-tasting ingredients.

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

For French onion soup, consider reaching for a red wine with spice notes, such as Cabernet Sauvignon or Pinot Noir. These varietals add a subtle kick of pepper and earthiness that play well with the soup's rich flavors.

Why do you put lemon juice in soup? ›

In this case, however, the lemon provides more of a flavor undertone that enhances other seasonings like thyme, parsley, and turmeric. According to trained chef Leetal Arazi, who spoke with Real Simple, you can bring a "zesty flavor" to your soup simply by adding lemon.

How do you 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 are the best onions for soup? ›

Yellow is the ideal variety for caramelizing. When you are sauteing onions to build flavor as a base for your dish (soup, tomato sauce, you name it), the yellow onion is your friend. That being said, white onions are a totally acceptable substitute for yellow, especially if you're cooking them.

What broth is French onion soup made of? ›

This soup traditionally is made with beef stock, though sometimes a good beef stock can be hard to come by and expensive to make. If you use boxed stock, taste it first! If you don't like the taste, don't use it. (If you cook a lot of beef or beef roasts, save the scraps and freeze them to make a stock with later.)

Why does French onion soup taste so good? ›

French onion soup is the ultimate comfort food. Onions get slowly cooked until sweet and caramelized, then simmered in rich broth until they're practically falling apart. To finish it off, toasted bread is added to give it that lovable crisp-gone-soggy texture and a generous amount of Gruyère cheese is melted on top.

What is the bowl called 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.

Why add flour to French onion soup? ›

Onion soup, at its very essence, is nothing more than onions and water boiled together. Period, done, finished, everything added from that point on is pure opinion. Caramelizing the onions brings out sugars, and makes a more luxurious silky and sweet soup, adding flour gently thickens and provides body.

How to keep bread from getting soggy in French onion soup? ›

How do you keep bread from getting soggy in French onion soup? To keep bread from getting soggy, you can broil the crusty bread slices with olive oil, separately, on a baking sheet for 2-3 minutes until crispy before adding to the soup.

How should I cut my onions for French onion soup? ›

Get the oven to 400 degrees while you prepare the onions: Cut down through the poles of each onion, down through the root end into and through the stem end. Peel each half, keeping the flesh tethered at the root end. Slice 1/4-inch thick longways, pole-to-pole, using a mandolin if you have one.

What to add to bland French onion soup? ›

Simmering out some water will intensify the flavor of the broth. Once you get it to the right point, add some salt. A shot of brandy at the end helps too.

How to doctor up canned French onion soup? ›

Some fresh rosemary or thyme brings a woody, peppery taste to the soup, complementing the umami flavor of the beef stock. With a splash of balsamic vinegar and green onions or fresh basil as a garnish, the canned soup is transformed from a grocery store original into a gourmet dish.

How do you get the depth of flavor in vegetable soup? ›

Dried herbs and seasonings: homemade seasoned salt, black pepper, Italian seasoning, and dried bay leaves lend flavor to the soup. Stock: I much prefer chicken stock over vegetable stock in terms of flavor, though if you want to keep this soup vegetarian, feel free to use vegetable broth or stock instead.

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