French Onion Soup
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Make a classic French Onion Soup with caramelized onions, beef broth, and melted cheese. Experience the rich flavor of this beloved dish with this traditional recipe. French Onion Soup – Taste the Unforgettable!
French Onion Soup, a classic French dish, has remained a beloved favorite among food enthusiasts for centuries. With its simple yet incredibly flavorful combination of caramelized onions, beef broth, and melted cheese, this soup has become a staple in many kitchens worldwide. But what exactly makes French Onion Soup so popular?
One of the key reasons behind its widespread popularity is this soup’s depth of flavor. Caramelizing the onions for an extended period creates a rich and intense sweetness. At the same time, the simmering in beef broth adds a savory note that complements the sweetness perfectly. This combination of flavors is further enhanced by adding melted cheese. Thus creating a creamy and indulgent experience that keeps people coming back for more.
French Onion Soup is also famous due to its simplicity. While the flavors may be complex, the ingredients and preparation methods are relatively straightforward. It doesn’t require fancy or hard-to-find ingredients, making it an accessible dish for home cooks of all skill levels. This simplicity also allows for creative variations, as individuals can add their personal touches to make the soup their own.
Moreover, French Onion Soup has a nostalgic and comforting quality that resonates with many people. Often associated with cozy French bistros and warm, hearty meals, it has become a symbol of comfort food. Whether enjoyed on a chilly winter evening or as a starter for a special meal, this soup has the power to evoke feelings of warmth and contentment.
Lastly, the communal aspect of French Onion Soup adds to its appeal. Traditionally served in individual crocks or bowls, each person gets their own portion topped with a generous amount of melted cheese. This communal serving style not only encourages sharing and conversation but also adds an element of fun to the dining experience.
Why is this the best recipe for French onion soup?
- This recipe incorporates the traditional elements that make French Onion Soup so beloved and also takes it a step further with a mouthwatering topping that will truly blow your guests’ minds.
- This recipe begins with the basics by caramelizing the onions to perfection. By slowly cooking the onions until they are sweet and golden brown, they release their natural sugars, resulting in deep, rich flavors that are the foundation of a truly exceptional French Onion Soup. Adding brown sugar and balsamic vinegar takes the caramelization process to the next level, enhancing the sweetness and adding a subtle tang that balances the overall flavor profile.
- But it doesn’t stop there. This recipe goes above and beyond by using beef broth instead of just water, infusing the soup with a savory depth that complements the sweetness of the onions. The aromatic notes of fresh thyme and a touch of salt provide the perfect seasoning, adding complexity to the soup.
- And, of course, we can’t forget about the star of the show: the melted cheese topping. This recipe is generous in its use of cheese. As a result, each bowl of soup is crowned with a luscious layer that oozes and stretches with every spoonful. The combination of cheeses chosen in this recipe creates a harmonious blend of flavors, with the nutty Gruyere and the sharpness of Parmesan working together to create a truly heavenly experience.
Ingredients and substitutes
- Starting with the star of the soup onions! We traditionally use yellow onions for French Onion Soup because of their sweet and mild flavor when caramelized. However, you can use other onion varieties or a mix for added complexity. These golden, sweet strands of caramelized onions are the heart and soul of the dish. Cooked low and slow until they reach that perfect deep brown hue, the caramelized onions bring a rich, savory sweetness essential for an authentic French Onion Soup topping.
- Next, we have the addition of brown sugar and balsamic vinegar. These ingredients work hand in hand to enhance the onions’ natural sweetness and add a touch of tanginess to the mix. The brown sugar adds a molasses-like depth, while the balsamic vinegar adds a subtle acidity that balances the sweetness.
- To create a robust base for the topping, we use beef broth. This savory liquid adds depth of flavor and ensures that each spoonful of soup is packed with umami goodness. The beef broth acts as a supporting character, enhancing the overall taste and adding a richness that elevates the dish.
- A dash of thyme and a pinch of salt are the seasoning powerhouses that tie everything together. Thyme brings an earthy, herbaceous note that complements the sweetness and richness of the other ingredients. Meanwhile, salt helps to heighten the flavors, ensuring that each bite is perfectly seasoned.
- Finally, we come to the star of the show: the cheeses. This recipe doesn’t hold back regarding cheese, resulting in a decadently indulgent topping. The combination of nutty Gruyere and sharp Parmesan creates a delightful balance of flavors. The Gruyere adds a creamy, slightly sweet note, while the Parmesan brings a robust, tangy kick. Together, they create a melty, stretchy blanket of cheese that takes this French Onion Soup to new heights.
Step-by-step French onion soup
- Sauté: Heat a large pot or Dutch oven over medium heat and add the butter and olive oil. Once the butter is melted and hot, add the sliced onions.
- Reduce: Sprinkle the salt over the onions and stir to coat them evenly. Cook the onions over medium-low heat, stirring occasionally, for about 30-40 minutes until they are caramelized and have a deep golden-brown color. Be patient; this step is essential for the soup’s rich flavor.
- Caramelized: Stir in the brown sugar and cook for 5 minutes until the sugar is dissolved and the onions become even more caramelized.
- Flavor: Add the minced garlic and balsamic vinegar to the caramelized onions, and cook for another 2-3 minutes until the garlic is fragrant and the vinegar has reduced slightly.
- Thicken: Sprinkle the flour over the onion mixture and stir to combine. Cook for 2-3 minutes, allowing the flour to cook and thicken the mixture. Then, add the white wine and let it cook for another 2 to 3 minutes, allowing the alcohol to cook out while still leaving all the fantastic flavor.
- Broth: Pour in the beef broth and add the bay leaf. Increase the heat to medium-high and bring the mixture to a simmer. Reduce the heat to low, cover, and let the soup simmer for about 20-25 minutes, allowing the flavors to meld.
- Oven: While the soup simmers, preheat your oven’s broiler. Toast the bread slices on both sides in the oven. Add a slice of mozzarella to each toast and broil for a minute more.
Pro tip – The mozzarella stuck to the toasted bread helps prevent the soup from soaking into too much. - Prep: Remove the bay leaf and thyme stalks from the soup. Taste and adjust the seasoning, adding more salt and black pepper to taste. Also, adjust the consistency of the soup, adding more broth or water if necessary.
Pro tip – You can make the soup up to two days ahead and warmed just before serving.
- Ladle the hot soup into four oven-safe bowls or crocks, leaving some space at the top. Sprinkle some of the cheese and place a toasted slice of French bread on top of each bowl of soup. Sprinkle a generous amount of Gruyère cheese over the bread, followed by a smaller amount of Parmesan and mozzarella cheese.
- Broil: Place the soup bowls on a baking sheet and transfer them under the broiler. Broil for 2-3 minutes or until the cheese is bubbly and golden brown. Keep a close eye to avoid burning.
- Garnish: Carefully remove the hot soup bowls from the oven using oven mitts or a towel (they will be hot), and garnish with fresh thyme or parsley if desired.
- Serve the French Onion Soup hot, and enjoy your homemade, cheesy, and delicious comfort food!
Tips for Success
- Slow and steady wins the race: Patience is key when caramelizing the onions for your soup topping. Take your time and allow the onions to cook slowly, allowing their natural sugars to release and develop that irresistible sweetness. Rushing this process may result in unevenly cooked onions and a less flavorful topping.
- The power of seasoning: Don’t underestimate the importance of seasoning each component of your French Onion Soup. While the broth should be well-seasoned, be mindful of the salt content in the cheese and bread you choose for the topping. Aim for a balance that complements the flavors rather than overwhelming them.
- Choose the right cheese: The type of cheese you choose can make or break your French Onion Soup topping. Gruyère is the classic choice, with its nutty and slightly sweet flavor that melts beautifully. However, don’t be afraid to experiment with other options like Swiss, Emmental, or a combination of cheeses to add your personal touch.
- Consider the bread: The bread used for the topping is just as important as the cheese. Traditional French bread works wonderfully, but you can also opt for a baguette or a crusty artisan loaf. Whichever bread you choose, slice it thick enough to hold up to the cheesy goodness yet thin enough to soak up the flavorful broth.
- The broil factor: The final broiling step is essential for achieving that mouthwatering golden crust on your French Onion Soup topping. Keep a close eye on the broiler; it can quickly take your soup from beautifully caramelized to charred. Make sure to position the oven rack at the right height and always be ready to pull it out at the perfect moment for a picture-perfect finish.
Creative variations
- Cheesy Herb Crust: Elevate your French Onion Soup by adding a cheesy herb crust to your topping. Mix shredded Gruyère cheese with finely chopped fresh herbs like thyme, parsley, and chives. Sprinkle this flavorful blend generously over the soup before broiling. As the cheese melts and browns, it will create a heavenly aroma and an additional layer of savory goodness.
- Bacon Bliss: Bacon lovers, rejoice! Take your French Onion Soup to new heights by incorporating crispy bacon into your topping. Cook a few slices of bacon until they are nicely browned and crispy. Chop the bacon into small pieces and mix it with the breadcrumbs and herbs before sprinkling it over the soup. The smoky, salty flavor of the bacon will add a delightful twist to the classic recipe.
- Onion Ring Extravaganza: For those who can’t get enough of onions, why not turn the topping into a crispy onion ring extravaganza? Slice onions into rings, dip them in a batter of flour, egg, and milk, and then coat them with breadcrumbs. Arrange the onion rings on top of the soup and broil until they turn golden brown and crispy. Not only will this create a visually stunning presentation, but it will also provide an irresistible crunch with every spoonful.
- Gourmet Mushroom Medley: Elevate your French Onion Soup with a gourmet twist by adding a medley of sautéed mushrooms to your topping. Choose a variety of mushrooms like cremini, shiitake, and oyster, and sauté them in butter until they are tender and golden brown. Mix the mushrooms with breadcrumbs, herbs, and a touch of garlic for an earthy and rich flavor profile. Spread this mushroom medley over the soup, broil it to perfection, and delight your guests with an extra layer of umami goodness.
Creative ways to serve French onion soup
- One way to serve this delectable soup is to take a cue from classic French cuisine and serve it “au gratin.” After adding the topping, sprinkle a generous amount of Gruyère or Emmental cheese over the soup and broil it until it melts and is golden brown. The result is a delightful combination of gooey, cheesy goodness and savory soup that will have your guests eagerly diving in for more.
- Another creative way to serve French Onion Soup is to turn it into a mini culinary adventure by serving it in individual bread bowls. Hollow out small round loaves of bread, leaving a bit of bread on the bottom and sides to form a sturdy bowl. Ladle the soup into each bread bowl and top with the flavorful onion topping. The bread absorbs the soup and adds a wonderful texture to each spoonful, making it a memorable and Instagram-worthy presentation.
- Consider serving the French Onion Soup as a shooter for a modern twist on the classic. Fill shot glasses or small glass bowls with a small portion of the soup, and then top it off with the exquisite onion topping. This elegant and bite-sized version allows your guests to savor the rich flavors of the soup in a single delicious gulp.
- If you’re adventurous and want to surprise your guests, why not experiment with a sweet and savory fusion? Try serving the French Onion Soup with a drizzle of balsamic reduction or sprinkling some crispy bacon crumbles over the top. The tangy sweetness of the balsamic reduction or the bacon’s smoky saltiness perfectly complements the soup’s deep flavors, creating a delightful combination that will leave your guests craving for more.
Frequently asked questions
What is French Onion Soup?
French Onion Soup is a classic French dish made with caramelized onions and beef broth and topped with melted cheese and toasted bread. It’s famous for its rich and savory flavor.
What is the best onions to use in French onion soup?
Yellow onions are traditionally used for French Onion Soup because of their sweet and mild flavor when caramelized. However, you can use other onion varieties or a mix for added complexity.
Can I substitute the balsamic with another type of vinegar?
Absolutely! While balsamic lends a unique tangy sweetness to the French Onion Soup, you can also experiment with other vinegars. Red wine, apple cider, or sherry vinegar can add distinct flavors and elevate the soup to new heights. Just remember the taste profile you aim for and adjust the quantity accordingly.
What kind of cheese is typically used for the topping?
Gruyère cheese is the most commonly used cheese for topping French Onion Soup due to its nutty and melty qualities. However, Swiss or Mozzarella can also be used.
Can I make French Onion Soup in advance?
Yes, you can prepare the soup base in advance and store it in the refrigerator for a day or two. When ready to serve, reheat the soup and add the cheese and toasted bread before serving.
Can I freeze French Onion Soup?
While it’s possible to freeze French Onion Soup, the texture of the onions and cheese may change upon thawing. It’s best enjoyed fresh or refrigerated for a short period.
Are there any vegetarian options for topping the French Onion Soup?
Certainly! If you have vegetarian guests or want a meat-free alternative, there are several options that can bring out the flavors of the soup. Consider topping your French Onion Soup with a dollop of tangy goat cheese or sprinkling some crispy fried onions on top. These vegetarian-friendly options will add a delightful texture and taste to the soup, satisfying all your guests, regardless of their dietary preferences.
Can I make French Onion Soup vegan?
You can make vegan versions of French Onion Soup using vegetable broth and substituting dairy-based cheese and butter with plant-based alternatives.
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French Onion Soup Recipe
Print Pin Rate Share by Email Share on FB Save GrowCalories: 465kcal
Adjust Servings Here: 6 servings
Description
Give your taste buds an unforgettable journey with French Onion Soup. Experience the richness of caramelized onions, beef broth, and melted cheese like never before.
Video
Ingredients
- 4 – 5 large (900 g) Onions (thinly sliced ( I used 4 med brown sweet and 1 small Spanish red Onions) )
- 2 tbsp (30 ml) Olive oil
- 2 tbsp (30 g) Butter
- 1 tsp Salt (or to taste)
- ¼ tsp Black pepper powder
- 2 tbsp (30 ml) Balsamic vinegar
- 2 tbsp (25 g) Brown sugar
- 2 tbsp (15 g) Al-purpose flour
- 4 large Garlic cloves (minced)
- 1 cup (240 ml) White whine
- 6 cups (1500 ml) Beef broth
- 2 small Bay leaves
- ½ tsp Black pepper powder
- 1 sprig Fresh thyme or parsley for garnish (optional)
Plus
- 4 slices French bread (toasted)
- 1 cup (113 g) Gruyère cheese (grated)
- ½ cup (50 g) Parmesan cheese (grated)
- ½ cup (60 g) Mozzarella cheese (grated)
- 1 tbsp Parsley or thyme leaves for garnish (optional)
Instructions
- Sauté: Heat a large pot or Dutch oven over medium heat and add the butter and olive oil. Once the butter is melted and hot, add the sliced onions.2 tbsp Olive oil, 2 tbsp Butter
- Reduce: Sprinkle the salt over the onions and stir to coat them evenly. Cook the onions over medium-low heat, stirring occasionally, for about 30-40 minutes until they are caramelized and have a deep golden-brown color. Be patient; this step is essential for the soup's rich flavor.4 – 5 large Onions, 1 tsp Salt
- Caramelized: Stir in the brown sugar and cook for 5 minutes until the sugar is dissolved and the onions become even more caramelized.2 tbsp Brown sugar
- Flavor: Add the minced garlic and balsamic vinegar to the caramelized onions, and cook for another 2-3 minutes until the garlic is fragrant and the vinegar has reduced slightly.4 large Garlic cloves, 2 tbsp Balsamic vinegar
- Thicken: Sprinkle the flour over the onion mixture and stir to combine. Cook for 2-3 minutes, allowing the flour to cook and thicken the mixture. Then, add the white wine and let it cook for another 2 to 3 minutes, allowing the alcohol to cook out while still leaving all the fantastic flavor.2 tbsp Al-purpose flour, 1 cup White whine
- Broth: Pour the beef broth, then add the bay leaf and thyme. Season with salt and pepper. Increase the heat to medium-high and bring the mixture to a simmer. Reduce the heat to low, cover, and let the soup simmer for about 20-25 minutes, allowing the flavors to meld.6 cups Beef broth, 2 small Bay leaves, ½ tsp Black pepper powder, 1 sprig Fresh thyme or parsley for garnish (optional), ¼ tsp Black pepper powder
- Oven: While the soup simmers, preheat your oven's broiler. Toast the bread slices on both sides in the oven. Add a slice of mozzarella to each toast and broil for a minute more. Pro tip – The mozzarella stuck to the toasted bread helps prevent the soup from soaking into too much.4 slices French bread
- Prep: Remove the bay leaf and thyme stalks from the soup. Taste and adjust the seasoning, adding more salt and black pepper to taste. Also, adjust the consistency of the soup, adding more broth or water if necessary. Pro tip – The soup can be made up to two days ahead and warmed before serving.
- Ladle the hot soup into four oven-safe bowls or crocks, leaving some space at the top. Sprinkle some of the cheese and place a toasted slice of French bread on top of each bowl of soup. Sprinkle a generous amount of Gruyère cheese over the bread, followed by a smaller amount of Parmesan and mozzarella cheese.1 cup Gruyère cheese, ½ cup Parmesan cheese, ½ cup Mozzarella cheese
- Broil: Place the soup bowls on a baking sheet and transfer them under the broiler. Broil for 2-3 minutes or until the cheese is bubbly and golden brown. Keep a close eye to avoid burning.
- Garnish: Carefully remove the hot soup bowls from the oven using oven mitts or a towel (they will be hot), and garnish with fresh thyme or parsley if desired.1 tbsp Parsley or thyme leaves for garnish
- Serve the French Onion Soup hot, and enjoy your homemade, cheesy, and delicious comfort food!
Recipe Notes & Tips
- Slow and steady wins the race: Patience is key when caramelizing the onions for your soup topping. Take your time and allow the onions to cook low and slow, allowing their natural sugars to release and develop that irresistible sweetness. Rushing this process may result in unevenly cooked onions and a less flavorful topping.
- The power of seasoning: Don’t underestimate the importance of seasoning each component of your French Onion Soup. While the broth itself should be well-seasoned, be mindful of the salt content in the cheese and bread you choose for the topping. Aim for a balance that complements the flavors rather than overwhelming them.
- Choose the right cheese: The type of cheese you choose can make or break your French Onion Soup topping. Gruyère is the classic choice, with its nutty and slightly sweet flavor that melts beautifully. However, don’t be afraid to experiment with other options like Swiss, Emmental, or even a combination of cheeses to add your own personal touch.
- Consider the bread: The bread used for the topping is just as important as the cheese. Traditional French bread works wonderfully, but you can also opt for a baguette or a crusty artisan loaf. Whichever bread you choose, slice it thick enough to hold up to the cheesy goodness, yet thin enough to soak up the flavorful broth.
- The broil factor: The final broiling step is essential for achieving that mouthwatering golden crust on your French Onion Soup topping. Keep a close eye on the broiler as it can quickly take your soup from beautifully caramelized to charred. Make sure to position the oven rack at the right height and always be ready to pull it out at the perfect moment for a picture-perfect finish.
Conversions Used
1 lb = 453 grams, 1 cup = 240 ml, 1 stick = 113g, 1 tbsp= 15 ml, 1 tsp= 5 ml,
Nutrition Information
Nutrition Facts
French Onion Soup Recipe
Amount per Serving
Calories
465
% Daily Value*
Fat
22
g
34
%
Saturated Fat
10
g
50
%
Trans Fat
0.2
g
Polyunsaturated Fat
2
g
Monounsaturated Fat
8
g
Cholesterol
47
mg
16
%
Sodium
1925
mg
80
%
Potassium
414
mg
12
%
Carbohydrates
41
g
14
%
Fiber
3
g
12
%
Sugar
12
g
13
%
Protein
21
g
42
%
Vitamin A
467
IU
9
%
Vitamin C
8
mg
10
%
Calcium
443
mg
44
%
Iron
3
mg
17
%
* Percent Daily Values are based on a 2000 calorie diet.
The nutrition information and metric conversion are calculated automatically. I cannot guarantee its accuracy. If this data is important to you please verify with your trusted nutrition calculator. Thank you
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French onion soup is a favourite in our house, especially during these cold winter days! It’s such a satisfying and cosy dish!
This French Onion Soup is pure comfort in a bowl! The rich, savory broth, perfectly caramelized onions, and the gooey melted cheese on top create a masterpiece. Soo goood..
This French Onion Soup is pure comfort in a bowl! The rich, savory broth, perfectly caramelized onions, and the gooey melted cheese on top create a masterpiece.
Spectacular soup. So thankful I found your recipe. Your French onion soup is delicious and so comforting; we all loved it and asked for more!
This recipe not only sounds amazing, but the pictures have me wanting a big bowl of it right now! I can’t wait to try this out!!