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? ›

My personal go-tos include worcestershire sauce, fish sauce, and brandy. Each deepens the flavor of french onion soup. Balsamic vinegar and soy sauce are other great options.

Is chicken stock or beef stock better for French onion soup? ›

While homemade beef stock is the very best option, there's no reason to turn your nose up at chicken stock, which is without a doubt the most versatile of all stocks to keep on hand in the kitchen.

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 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.

How do you make soup taste richer? ›

Add acidic ingredients.

Foods that have a great deal of acidity, like lemon juice, vinegar, white wine, and tomato puree, can help liven up the flavor of bland-tasting bone and other broths. "The acidity of these ingredients works to complement and enhance the broth's flavors, not mask it.

What spices add depth to soup? ›

Herbs and sources add flavor, aroma, and intensity to the soup broth. You can pick fresh or dried herbs like basil for tomato-based soups or fresh parsley for clear broths. You may also add more spices like turmeric, ground ginger, ground paprika, or nutmeg for a touch of spice and color to your soup broth.

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.

What is the best wine to use in 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.

Which broth is best for soup? ›

Best Chicken Broth for Soup

Swanson's broth is perfectly savory with the right blend of carrots, celery, onion and a little something extra. “This brand has an almost buttery quality to it,” explains Mark. Testers described Swanson broth as being comforting and even nostalgic flavor to it.

Why do you put vinegar in soup? ›

Vinegar, much like salt, is a flavor enhancer — it not only imparts its own taste and acidity to a soup, but in small quantities, it helps to bring out the brightness of other ingredients as well.

Should onions be caramelized for French onion soup? ›

The Secret Ingredient Is Time. The second most important element is to properly caramelize the onions. Caramelizing the amount of onions needed in this recipe will take at least 40 minutes. Caramelizing is a chemical process that occurs when the sugars in the onions reach a certain temperature.

Why is my French onion soup sour? ›

It might be because of the stock or that you used onions that has sour flavor such as white onions.

How do you 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 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.

How do you add acid to French onion soup? ›

For our French onion soup, you doctor up the beef stock with a little white wine and cognac. They add just the right hit of sweet acidity and complexity; without these ingredients, the stock and onions can be overwhelmingly flat and sweet, so try not to skip them.

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