Vegan French Onion Soup Recipe (2024)

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5 from 2 votes

50 minutes minutes

by Marly

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This Vegan French Onion Soup recipe may be the best comfort food available. From the rich, caramelized onions to the crusty bread on top with melted vegan cheese, every bite is better than the last.

Vegan French Onion Soup Recipe (1)

Hearty vegan soup recipes make the best all-around dishes because they can be an appetizer, a side dish (for salads or sandwiches), or even the main meal. This veggie French onion soup takes it to another level because it’s all those things and absolutely delicious, too!

When it comes to comfort food, I find soup, vegan loaded potatoes, vegan nachos, and even this vegan beef stroganoff to be my favorites.

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Vegan French Onion Soup Recipe (2)

Key Ingredients

You can find the full printable recipe, including ingredient quantities, below. But first, here are some explanations of ingredients and steps to help you make this recipe perfect every time.

Here are the ingredients you’ll need for this recipe, including substitution ideas:

  • Olive oil — Any neutral vegetable oil will work, but I prefer olive oil.
  • Onions — You’ll need around 5 yellow onions, peeled and thinly sliced.
  • Brown sugar — We’ll add a bit of brown sugar to help the onions caramelize.
  • Garlic cloves — A key ingredient in most soup recipes, you’ll need around 4 or 5 cloves of garlic.
  • Flour — You can use all-purpose or gluten-free as a thickener for the soup.
  • White wine — This adds flavor, but it serves a purpose too, in that it helps deglaze the pan after cooking the onions.
  • Bayleaves — You’ll need 2 bay leaves.
  • Vegetable broth — I recommend a high-quality vegetable broth, like vegetarian Better Than Bouillon combined with water.
  • Dried thyme — A bit of dried thyme adds amazing flavor.
  • Vegan Worcestershire sauce — Standard Worcestershire sauce is made with fish, so make sure to use vegan Worcestershire Sauce. You can buy it at health food stores or online.
  • Baguette — You’ll need one baguette cut into six one-inch slices.
  • Vegan mozzarella shreds — We use either Daiya or Follow Your Heart vegan cheese.

Why is This the Best Recipe?

  • Onions are sliced thinly and caramelized until golden in color, creating the perfect foundation for this soup.
  • Adding white wine adds a savory flavor and deglazes the pan, meaning you get all the delicious morsels in every bite.
  • Baguette slices are toasted, creating one large crouton in each bowl of soup. As it soaks up the soup below it, the toasted bread becomes even more flavorful.

Storage Tips

Store soup in an airtight container in the fridge. It will keep up to 5 days. It can be frozen by transferring it to freezer-safe containers where it will keep up to 3 months. To serve, remove soup and let it come to room temperature. Cook until heated through. Then add toasted bread and vegan cheese on top and broil, until the cheese turns golden brown.

Frequently-Asked Questions

Is French onion soup vegan?

Traditional French onion soup is made with beef broth and topped with mozzarella cheese, so it’s not a vegan soup. However, it’s easy to transform this soup into a vegan delight by using vegetable broth and vegan mozzarella.

What can I use instead of wine in French onion soup?

There may be plenty of reasons you prefer not to cook with wine, however, don’t be left behind on the amazing flavor it adds to this soup. Create a decent substitute by combining 4 tablespoons of whine vinegar with a cup of vegetable broth.

Serving Suggestions

Serve vegan French soup with any of the following:

  • Vegan Caesar Salad
  • Cauliflower Salad
  • Vegan Pasta Salad
  • Vegan Garlic Bread

Reader Reviews

★★★★★
I love french onion soup but didn’t realize it was possible to make it vegan. This recipe is so good!

Elana

Vegan Soup Recipes

If you love this vegan French onion soup, here are even more tasty plant-based soup recipes you’ll love:

Vegan Split Pea Soup

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Biome Broth

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Vegan Tomato Soup

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Vegan Carrot Ginger Soup

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Vegan French Onion Soup Recipe (7)

That’s it for this vegan soup. Enjoy!

Vegan French Onion Soup Recipe (8)

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Vegan French Onion Soup Recipe (9)

Vegan French Onion Soup Recipe (10)

Vegan Onion Soup

This vegan onion soup is full of all the caramelized onion flavors. It's made with vegetable broth (instead of beef broth) and topped with vegan mozzarella. It's a classic soup recipe veganized to be your next favorite comfort food.

5 from 2 votes

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Course: Soup

Cuisine: French

Prep Time: 10 minutes minutes

Cook Time: 30 minutes minutes

Resting time: 10 minutes minutes

Total Time: 50 minutes minutes

Servings: 6

Calories: 365kcal

Author: Marly McMillen

Ingredients

  • 3 tablespoons olive oil
  • 5 large onions , peeled and sliced thin (see notes)
  • 2 teaspoons brown sugar
  • 4 medium garlic cloves , peeled and minced
  • 3 tablespoons flour (all-purpose or gluten-free)
  • ½ cup white wine
  • 2 bay leaves
  • 6 cups vegetable broth (see note)
  • 1 teaspoon dried thyme
  • 1 teaspoon vegan Worcestershire sauce
  • 6 slices baguette (one-inch slices)
  • ¾ cup vegan mozzarella shreds

Instructions

  • Caramelize the onions.Pour the olive oil into a pot overmedium-high heat. Add the onions and sauté for 3 to 5 minutes, stirring regularly. Stir in the sugar and cook until the onions are caramelized, stirring regularly.

  • Make a Roux. Add the garlic and sauté for 2 minutes. Stir in the flour—cook and stir for about 1 minute. Add the wine. Use a spatula or wooden spoon to get the brown bits in the pan.

  • Simmer.Stir in the vegetable broth, Worcestershire, thyme. Add the bay leaf and cook until the soup begins to simmer (low boil). Reduce the heat to medium-low, cover the pot, and simmer for 10 to 15 minutes. Use tongs to remove the bay leaf. Season with salt and pepper to taste.

  • Toast the bread.While the soup is cooking, preheat the oven to 400°F. Place the baguette slices in a single layer on a baking sheet. Bake for approximately 7 minutes, until the bread is toasted and golden around the edges. Remove the pan.

  • Broil.Turn the oven to the broiler setting and use oven mitts to place an oven rack on the top tier. Place soup crocks (oven-safe) on a baking sheet. Ladle some soup into the bowls, and top each with a toasted baguette slice. Add about 2 tablespoons of cheese over the top of the bread slices. Place the pan on the top rack and broil for 3 to 4 minutes, until the cheese is melted and golden brown in spots.(Pay close attention, so they don't burn.) Use oven mitts to remove the pan from the oven.

  • Serve. Allow the soup to cool for a few minutes, then serve warm.

Recommended Equipment

Medium Saucepan

Soup Crocks

(The products above contain sponsored links to products we use and recommend)

Notes

How to cut onions in thin slices:

  1. Take a whole, unpeeled onion and lay it on its side. Cut off the top and the root end.
  2. Stand the onion on one of the flat ends. Cut down the onion, cutting it in half, and peel off the outer onion skin.
  3. Lay one of the halves, cut side down. Slice the onion, beginning on the uncut, rounded edge. Once you reach the middle, tip it over and continue making thin slices. Be careful to keep your fingers out of the way as you reach the end of the onion.
  4. Repeat with the other half of the onion.

Calories: 365kcal | Carbohydrates: 52g | Protein: 10g | Fat: 12g | Saturated Fat: 2g | Sodium: 1340mg | Potassium: 428mg | Fiber: 10g | Sugar: 9g | Vitamin A: 521IU | Vitamin C: 11mg | Calcium: 86mg | Iron: 4mg

The nutrition information shown is an estimate provided by an online nutrition calculator and should not be considered a substitute for a professional nutritionist’s advice.

Did you make this recipe?

Leave a rating below then tag @namelymarly on Instagram and hashtag it #namelymarly. I love seeing your creations!

Vegan 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.

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.

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 can I thicken my 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.

How do you fix bland onion soup? ›

Fix a bland onion soup by using supermarket broth and mild white onions, tasteless oil for sauteeing, stale plain white bread instead of croutons, and mild white cheese. Start by reducing the broth. Simmering out some water will intensify the flavor of the broth. Once you get it to the right point, add some salt.

What can I add to soup for depth of flavor? ›

"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.

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.

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.

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.

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. It's traditionally served in a ramekin or a ceramic crock with a handle.

What ethnicity is French onion soup? ›

The classic French onion soup gets its name from its country of origin: France. After making its debut in the 18th century, it has become a national treasure. During ancient times (and still today), onions were cheap and easy to grow, and hence, readily available.

What pairs well with French onion soup? ›

What to Serve with French Onion Soup
  • Pan Seared Shrimp.
  • The Best Dinner Rolls.
  • Maple Bacon Carrots.
  • Garlic Parmesan duch*ess Potatoes.
  • Baked Bruschetta Chicken.
  • Caramelized Onion Pasta.
  • Sauteed Garlic Broccolini.
  • Perfect Baked Potatoes.
Jan 16, 2024

How do vegans thicken soup? ›

Blend 1½ cups cooked beans, lentils, or chickpeas with ½ cup water or broth until completely smooth. Add 2 tablespoons bean puree per 1 cup soup or stew, then stir until fully incorporated. Simmer 1 to 2 minutes, until flavors meld.

Why put flour in French onion soup? ›

Sprinkle flour over and stir into onions, if you do not eat gluten you can omit. This step gives onion soup a bit more depth and body. Add red wine, chicken stock or water, thyme, and bay leaf and simmer for 30 minutes.

What to use instead of wine in French onion soup? ›

If you prefer not to use Wine, you can substitute 3 Tablespoons white wine vinegar + chicken or beef broth to make 3/4 cup.

How do you get the depth of Flavour 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.

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 type of sherry is best for French onion soup? ›

One of the key flavors present in a good bowl of French Onion Soup is thanks to dry Fino or Manzanilla Sherry and/or a dollop of Sherry vinegar. Why not spend a couple of hours slowly cooking down a pile of onions, simmering them in stock, finally topping with cheese?

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