How To Make Gluten-Free French Onion Soup Recipe

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This recipe for Gluten-Free French Onion Soup is a twist on a fine dining classic ensuring that everyone can enjoy its oniony goodness. It does require some commitment with a three-hour cook time, but it is absolutely worth the effort!

How To Make French Onion Soup (Gluten Free)

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Gluten-Free French Onion Soup

The full ingredients list and instructions are found in the printable recipe card at the end of this post. I highly recommend reading the blog post all the way through so that you don’t miss any tips or substitution suggestions and ensure that you have all the ingredients and equipment required and understand the steps and timings involved.

French onion soup is made using beef broth and onions – lots of onions! It is then topped with a toasted piece of bread covered in melted cheese.

To make a gluten-free version of this hearty soup (that be served as a main meal or first course) the topping is made using slices of gruyére cheese and grated parmesan – making it extra cheesy.

This rich and delicious recipe takes some time to come together. However, the results are well worth it. The richly caramelized onions and slowly simmered broth are incredible.

Gluten-Free French Onion Soup

Ingredients & Equipment Used In This Recipe

While most ingredients can be bought in grocery stores, for your convenience, any specialized or notable ingredients and equipment needed for this recipe have been listed below and linked to Amazon or other stores if available online.





It may not include staple ingredients such as oil, salt, sugar, etc., as you’re likely to have those in your kitchen. The complete list of ingredients with measurements is found in the recipe card.

  • Fresh ProduceOnions, Thyme.
  • DairyUnsalted Butter, Gruyère Cheese, Parmesan Cheese.
  • Dry Red Wine use a wine that you enjoy drinking.
  • Balsamic Vinegar
  • Beef Broth/Stock
  • Bay Leaves
  • Italian Seasoningthis recipe uses store-bought Italian Seasoning, but it is so easy to make your own herb mixes, especially if you already have a bunch of herbs and spices in your pantry already. Just mix equal measures of dried basil, oregano, rosemary, parsley, and thyme. You can also add a pinch of garlic granules or powder as well as red chili flakes if you like. Store in an airtight jar and use in recipes as required.
  • Garlic Powder
  • Worcestershire Sauce

Recipes on The Purple Pumpkin Blog use both cup measurements and/or weighted measurements. American cups and kitchen food scales are handy pieces of equipment to have in your kitchen as it means you’ll be able to make all of the different recipes on my blog. I try to give American, imperial, and metric measurements in my recipes. Please note, you can mix cup measurements with weighted measurements, but never mix imperial (pounds, ounces, pints, etc.,) with metric (kilograms, grams, litres, etc.,).

French Onion Soup Recipe

More Gluten-Free Soup Recipes

For more gluten-free soups try these:

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More Soup Recipes

Looking for more soups to make? Check these recipes out next:

I’ve got more Easy Soup Recipes for you to enjoy – right-click and open these other recipes in a new tab so that you can read them after this one!

Recipe for Gluten-Free French Onion Soup

Recipe Tips

  • To prevent cracking, don’t place ramekins or bowls too close to the broiler/grill if you don’t know their temperature rating. Keep a close watch while broiling to prevent over-browning.
  • This recipe uses slices of Gruyére cheese for visual effect. To create the stringy, chewy goodness found in classic restaurant-style French Onion Soup, use equal amounts (3 oz. each) of coarsely grated Gruyére cheese and Mozzarella instead of the Gruyére and Parmesan used below.

How Do I Make Gluten-Free French Onion Soup?

Check out the printable recipe card below with full ingredients and instructions. Any demonstration photos do not print out to save your ink.

French Onion Soup Recipe

Gluten-Free French Onion Soup

Yield: 4
Prep Time: 20 minutes
Cook Time: 3 hours
Total Time: 3 hours 20 minutes

This recipe for Gluten-Free French Onion Soup is a twist on a fine dining classic ensuring that everyone can enjoy its oniony goodness!

Ingredients

  • ¼ cup unsalted butter
  • 2 lbs/900g yellow onions, trimmed and sliced root to tip
  • Sea salt and black pepper, to taste
  • ½ cup dry red wine
  • 2 Tbsp balsamic vinegar
  • 4 cup beef broth/stock
  • 2 whole bay leaves
  • 2 tsp Italian seasoning
  • 1 tsp garlic powder
  • 4-5 sprigs, fresh thyme
  • 1 tsp Worcestershire sauce, optional

For the Topping

  • 6 oz. Gruyère cheese, sliced thin and
  • ½ c. Parmesan cheese, freshly grated OR
  • 3 oz Gruyère cheese, coarsley grated and
  • 3 oz Mozzarella, coarsley grated

Instructions

  1. Heat the butter in a large, high-sided skillet over medium heat. Add sliced onions and season with salt and black pepper, to taste. Stir to combine. Cook, stirring occasionally, until caramelized, approximately 45 minutes to one hour.
  2. Deglaze the bottom of the pan by adding the red wine and balsamic vinegar and gently scraping the browned bits off the bottom with a spatula.
  3. Add the broth, bay leaves, Italian seasoning, garlic powder, sprigs of fresh thyme, and Worcestershire sauce, if using. Season with additional salt and black pepper, if desired, and stir to combine.
  4. Increase heat to high and bring to a rapid boil, then immediately reduce heat to medium-low. Loosely cover the skillet with a lid and simmer, stirring occasionally, for two hours.
  5. Remove from the heat and discard the thyme stems and bay leaves. Divide the soup between four large oven-safe ramekins or bowls. Top with slices of the Gruyère cheese, followed by the freshly grated Parmesan cheese. *
  6. Turn broiler/grill to high.
  7. Arrange ramekins on a large, rimmed baking sheet and place them on the top oven rack. Broil/grill for approximately 8-10 minutes until the cheese is melted and golden brown. Remove from oven and serve immediately garnished with a few fresh thyme leaves. Enjoy!

    French Onion Soup Recipe

Notes

  • To prevent cracking, don’t place ramekins or bowls too close to the broiler/grill if you don’t know their temperature rating. Keep a close watch while broiling to prevent over-browning.
  • *Or use the other cheese option if you'd like to create the stringy, chewy goodness found in classic restaurant-style French Onion Soup
Nutrition Information:
Yield: 4 Serving Size: 1
Amount Per Serving: Calories: 700Total Fat: 43gSaturated Fat: 25gTrans Fat: 0gUnsaturated Fat: 16gCholesterol: 134mgSodium: 1235mgCarbohydrates: 37gFiber: 4gSugar: 16gProtein: 36g

This site uses Nutritionix to provide estimated nutrition. Nutritional information is always approximate and will depend on the quality of ingredients used and serving sizes. If you need exact calories and macros, please do your own calculations.

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