The Best French Onion Soup Recipe (2024)

Survey: raise your hand if you've ever ordered French Onion Soup from a restaurant envisioning a bowl of richly flavored broth, filling the room with the smell of caramelized onion, and topped with all the Gruyere your little heart could desire. Now raise your hand if, instead of a bowl of ambrosia, you received the equivalent of a slightly more aromatic chicken stock topped with a few sad, half-melted strands of pre-grated Safeway Swiss, alongside a chunk of day-too-old baguette. If you associate French Onion Soup with chain cafés, believing that this is a quintessential example of this dish, you probably haven't been super motivated to attempt it on your own (sorry Panera Bread). Or maybe you've never thought of it because, frankly, it just doesn't sound that interesting - I mean it is just onion, bread, and cheese in a simple stock, right? Wrong.

Anyone out there who has been lucky enough to spend some time in France knows that this simple soup can be one of the most flavorful, dynamic, welcoming dishes on any menu. Just like how many Americans view chicken noodle soup or hearty stews as warm reminders of home, French Onion Soup reminds me of the comfort of a warm bistro in Paris on a cold winter's day. While living in Paris, I scoured my quartier in search of the best French Onion Soup, and I thought I had found it in a brasserie near Place Saint Michel. I thought that, until I went back home to Sacramento and watched my mom school those Parisien chefs. BOOM!

Actually, I must give credit where credit is due. My mom's recipe is actually a page out of a Julia Child cookbook, who we all know learned everything she wrote about from none other but the French. So, you can imagine my excitement upon returning to the States only to find I could eat one of my favorite dishes whenever I told my mom to hurry up and make me a sandwich...er I mean, a bowl of onion soup. But unlike other moms that only see their beloved daughter during occasional visits and bend over backwards to satisfy any and all dining demands, mine doesn't really respond well to me barking orders as soon as I grace my family with my presence. So, she usually saves this dish for special occasions. What I'm trying to say here is that I realized early on, if I wanted this soup, I was going to have to make it myself.

And that's exactly what I did. Now, it's a part of my repertoire, and it's good...real good. And it's not because of some culinary prowess inherent inside of me that this dish is consistently just so...well...just so perfect. It's really because even a pigeon could probably follow the instructions and have it come out as it should. NOTE: It can take a considerable amount of time to execute (~3 hours), so give yourself some time. Otherwise, this is a classic, delicious example of French Onion Soup that's perfect when it's just you, a blanket, and Bravo, or when you're entertaining a group of friends.

Julia's French Onion Soup


(Paraphrased from Mastering the Art of French Cooking, Julia Child et al, Volume I, “Soupe a l'Oignon Gratinee”)

Serves 4-6
5 C yellow onions, thinly sliced (about 1-1/2 lb)
3 T butter
1 T oil
1 tsp salt
1/4 tsp sugar
3 T flour
2 qts boiling brown stock or canned beef bouillon
1/2 C dry white wine or vermouth
salt, and pepper to taste
1 French baguette, cut in 3/4" thick rounds (My mom uses sourdough bread cut in large cubes, generally a LaBrea sourdough oval baked fresh daily at Costco)
olive oil
3 Tb cognac
1-2 cups Swiss cheese or Gruyere shredded, and 2 oz cut into chunks
1 Tb grated raw onion
1 Tb of olive oil or melted butter

Cook the onions slowly with the butter and oil in a heavy covered saucepan for 15 minutes. Add the salt and sugar, raise the heat to moderate and cook 30 - 40 minutes, stirring frequently, until the onions have turned a deep golden brown. Sprinkle in the flour and stir for 3 minutes.

Remove from heat.

In a separate pot, bring the stock or bouillon to a boil. Blend mixture into the onions. Add wine, season to taste, and simmer partially covered 30 - 40 minutes, skimming occasionally. Correct seasoning. If not served immediately, return to a simmer before serving.

While soup simmers bake the bread rounds on a baking sheet in a preheated 350º oven about 30 minutes, till hard and lightly browned, basting them with olive oil after 15 minutes, and then turning them and basting the other side. When baking is completed, rub each piece with a cut piece of the garlic.
I cube the sourdough and baste with olive oil, then toast in the oven. When you pull them out, I hand rub garlic clove around each cube.

When the stock and bread are prepared, add the cognac to the stock and pour soup into individual oven proof bowls. Add a few chunks of cheese and grated onion to each bowl. Top with golden bread rounds (or bread cubes) and sprinkle with the grated cheese and Oil or butter (Julia loves her butter, but I cut the extra oil out).

Lower heat to 325 and bake in the oven for 20 minutes. Brown under the broiler if necessary.

Serve immediately. But be careful! It will be hot like lava for awhile after it comes out of the oven, and someone is bound to burn their tongue, so I usually allow the bowls to cool for 5-10 minutes before serving.

If you try this recipe from home, drop me a line and let me know how it turns out!

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The Best French Onion Soup 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.

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.

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 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.

What can I add to French onion soup to make it better? ›

To amp up the flavor further, I add a generous amount of white wine, along with aromatic thyme and garlic. Then, I finish it all off with a classic French onion soup essential: toasty baguette topped with melty cheese!

Why do you 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.

What is the difference between onion soup and French 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.

Does it matter how you cut onions for French onion soup? ›

Also, cutting pole-to-pole results in more uniformly sized slices, both in width and length. For certain cooking preparations using onions, such as French onion soup (our recipe here), this means more manageable and uniform cooking and browning.

Why is my French onion soup bitter? ›

The underlying flavor of this soup is the deep umami flavor of the caramelized onions. If you rush this process, the result will be a bitter charred flavor, and if you underestimate and skip this process the flavor will be nowhere near as deep or complex.

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.

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.

Why do people put lemon in soup? ›

Lemons are a chicken soup game changer. Why? They brighten up and balance the salty, rich flavors of the dish, and make all of the ingredients come into line.

Is red or white wine better in French onion soup? ›

That said, French onion soup's other key ingredients are beef broth and gruyere cheese, which accounts for its utterly decadent and robust balance of sweet, creamy, and umami. For umami-rich beef dishes and ultra-creamy cheeses, red wine's complexity, fruitiness, and bitter finish are the optimal choices.

Can I use chicken broth instead of beef broth in French onion soup? ›

If you can't get good quality beef broth, use chicken or vegetable instead. I find that the quality of those by mainstream brands is much better than the beef stock. The beef is fine to use in things like gravy and stews, but not when it's a key ingredient like in this recipe.

How to doctor up canned French onion soup? ›

Infusing the soup with a richer taste is as easy as quickly sauteing crushed garlic before pouring the soup in. Some soft, buttery garlic sauteed in earthy olive oil is the perfect addition to enrich canned French onion soup.

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.

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

A squeeze of citrus, a dollop of yogurt or a drizzle of cream, a dusting of cheese or a good chile powder, a sprinkling of some herbs or croutons — all can take a perfectly fine soup into the realm of the delectable. Even a spiral of good olive oil to finish and some coarse sea salt can do wonders.

References

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