Easy Vegan French Onion Soup Recipe | Elizabeth Rider (2024)

Easy Vegan French Onion Soup Recipe | Elizabeth Rider (1)

Vegan French Onion Soup is hearty, elegant, and surprisingly easy to make.

This is my vegan twist on classic French onion soup, the main difference being that I use vegetable stock instead of beef stock.

With just six ingredients and a little (hands-off) patience while the onions caramelize, you’ll wonder why you haven’t been making this for years to use up any onions you have sitting on your counter.

In these colder winter months, there’s no better way to stay warm than with a cozy bowl of hot soup.

Aside from being delicious, this vegan french onion soup recipe has nourishing and healing properties.

Give it a try; you’ll be shocked at how much it tastes like the original. I prefer a few big white or yellow onions in this soup.

However, you can use any combo of onions you have on hand—they all become sweet when cooked down and caramelized.

The hands-on time for this recipe is really limited; most of the time it takes is spent on the stove without your help.

It’s the perfect thing to make on a weekend afternoon while you’re doing other chores around the house.

It makes your kitchen and house smell amazing, trust me!

Vegan French Onion Soup Key Ingredients

To make this delicious healthy soup, you’re going to need just a few simple ingredients.

Onions (Of Course!)

Onions, along with garlic, shallots, scallions, and leeks, come from the Allium family and are loaded with antioxidant power.

Plus, they are delicious. Especially when cooked low and slow in recipes like this.

Onions are particularly high in flavonoids that stimulate the production of glutathione, a powerful antioxidant for your liver that helps eliminate toxins.

Onions also contain high levels of sulfur and quercetin, which help neutralize free radicals in the body and protect cell membranes.

Easy Vegan French Onion Soup Recipe | Elizabeth Rider (2)

Thyme (Preferably Fresh)

Our other star ingredient, thyme, has been used for its medicinal purposes for centuries to treat things like gastrointestinal issues, laryngitis, and lack of appetite.

Thyme can also help relieve respiratory ailments related to the common cold and flu. Thymol, flavonoids, B vitamins, vitamin C, and others give thyme its healing properties.

Fresh thyme has an incredible aroma and flavor that’s hard to capture when it’s dried. Use fresh thyme if you can, but feel free to use dried thyme if you can’t find it fresh.

Thyme is a hearty herb that grows well in pots and planters. So, if you find yourself making vegan french onion soup often, then grab yourself a little thyme plant at your local garden store for around $3 to enjoy thyme all year round.

Vegan French onion soup is easy and extra good for you, so eat up!

If you like this soup, try dozens more healthy soup recipes — soup is one of my specialties.

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Easy Vegan French Onion Soup Recipe | Elizabeth Rider (3)

Easy Vegan French Onion Soup Recipe

5 Stars4 Stars3 Stars2 Stars1 Star5 from 8 reviews

  • Author: Elizabeth Rider
  • Prep Time: 15 mins
  • Cook Time: 1 hour 45 mins
  • Total Time: 2 hours
  • Yield: 8 servings 1x
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Description

This vegan French onion soup recipe has been a top Google search result for almost 10 years now—for good reason! It’s healthy, simple to make, and absolutely delicious. If you love it, please leave a star rating in the comments below to help other readers in our community.

Ingredients

UnitsScale

  • 2 tablespoons extra virgin olive oil
  • 3 large white or yellow onions, sliced into thin half-moons
  • 3 large fresh thyme sprigs (about 1 tbsp), leaves stripped, OR 1/2 teaspoon dried
  • 4 cups (1 quart) vegetable stock/broth (no salt added), OR (if not vegan) beef broth or chicken broth)*
  • 2 cups of filtered water
  • 1 bay leaf
  • 2 tablespoons good-quality aged balsamic vinegar
  • 3 teaspoons sea salt, divided (plus more to taste if needed)
  • 1/2 teaspoon freshly ground black pepper

Optional

  • sprouted whole grain bread
  • vegan cheese melted on top

(Non-Vegan Version):

  • grated Gruyere cheese or Swiss cheese (obviously not vegan!) is traditional to melt on top of French onion soup if you follow a “flexitarian” eating style

Instructions

  1. Heat 1 tablespoon olive oil over medium heat in a large soup pot or Dutch oven.
  2. Add the onions, thyme, 1 teaspoon salt, and drizzle 1 tablespoon olive oil over the onions; lower the heat to medium-low. The onions may be filling the pot completely but will cook down to about ⅓ of their mass.
  3. Cook uncovered, stirring occasionally until the onions caramelize and turn light golden brown, about 50-60 minutes.
  4. Add the balsamic and cook until it’s absorbed and the onions are a deeper brown, about 15 more minutes.
  5. Add the stock, water, bay leaf, remaining salt, and pepper, then bring to a boil.
  6. Turn the heat to low and simmer at least 30 minutes.
  7. Remove the bay leaf before serving.
  8. I usually eat it just like this, but you can also serve it with toasted sprouted grain bread and melted gruyere cheese for a more classic presentation (adding the cheese of course makes it not vegan). Instead of baking the cheese onto the soup, put slices of sprouted grain bread on a baking sheet, rub the tops with a fresh garlic clove, drizzle with a little olive oil, and top with the gruyere cheese. Bake for 10 minutes at 350º until the cheese is melted. Top each cup of soup with a slice of the cheesy bread and serve.
  9. This soup (minus the cheese and bread) freezes well in an airtight glass container.
  10. Tip: You can also substitute 1/4 cup of good quality, bold red wine for the balsamic vinegar. I suggest a burgundy or cabernet sauvignon if you want to use wine instead of balsamic vinegar.

Notes

*Note on choosing stock: This recipe is written to be vegan so I use vegetable broth. I’ve included these substitutions if making it vegan is not important to you:

  • (Non-vegan options) Beef broth is traditional in French onion soup and has a deep earthy flavor. Chicken stock is also a great option here if you prefer it. When choosing beef or chicken stock, I suggest a high-quality (preferably organic) stock that does not contain added preservatives or excess sodium. (I like the brands Pacific, 365 from Whole Foods and Kirkland from Costco.) You can also use my homemade chicken stock (aka bone broth) recipe or store-bought bone broth to make this soup for extra protein and healing properties.
Easy Vegan French Onion Soup Recipe | Elizabeth Rider (4)
Easy Vegan French Onion Soup Recipe | Elizabeth Rider (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.

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.

Why is my French onion soup so bland? ›

If the onions are not cooked long enough or over low heat, they won't develop the sweet and rich flavor that is characteristic of this soup. Lack of seasoning: Seasoning is crucial in any dish, and French onion soup is no exception.

What's the difference between French onion soup and 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.

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 gives vegetable soup that depth of flavor? ›

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 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 do you 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.

Does sour cream make soup thicker? ›

Another option for thickening soup is by using dairy like sour cream or yogurt. Start with a small dollop and stir before checking the consistency and adding more. We recommend using plain yogurt so you don't alter the taste of the soup. You can also use cream if you prefer.

What not to put in soup? ›

The Worst Things to Put in Your Soup
  1. By Sara Butler. If there's one good thing about fall and winter, it's soup. ...
  2. Heavy Cream. Heavy cream creates an inviting texture for soups but that's where its positive contributions end. ...
  3. Juice. ...
  4. Turkey Bacon. ...
  5. Cheese. ...
  6. Croutons.

What vegetables can you not put in soup? ›

Foods in the Brassica family, such as collards, are too strong for stock/broth and can impart a bitter taste. Corn doesn't add a lot of flavor and can make the stock/broth cloudy.

What gives soup the best flavor? ›

Herbs and spices add aroma, flavor, and intensity to soup broth. "Use fresh or dried basil in tomato-based recipes or fresh parsley to add freshness to clear broth soups," says Sofia Norton, RD. You can also go with more heat and spices.

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.)

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.

Do people in France eat French onion soup? ›

It has even become a trendy dish that tourists are eager to try to experience French gastronomy. However, onion soup is in fact not part of French people's daily meals. It was originally meant to be eaten after a family reunion in the middle of the night to cure hangovers…

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.

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.

How do you reduce acidity in French onion soup? ›

You can try adding a pinch of baking soda, a small amount of sugar, or a splash of dairy such as milk, cream, or yogurt. These ingredients can help to balance out the acidity and make the soup more palatable.

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