French onion soup is a delicious, low-carb, keto-friendly soup that's perfect for welcoming the cooler temperatures of the fall season. With a rich bone broth as a base, a bunch of onions, topped with a slice of keto bread and melty cheese, this recipe does not skimp in the flavour department. It can take time to make, but it's a soup you'll savour.
Keto French Onion Soup Recipe
Ingredients:
- 5 tablespoons olive oil
- 1 tablespoon unsalted butter
- 2 lbs sweet onions, thinly sliced
- Kosher sea salt and freshly ground black pepper, to taste
- 4 cups beef bone broth (*Or use vegetable broth for vegetarian.)
- 1 teaspoon dried thyme
- 1 bay leaf
- 3 tablespoons red wine vinegar
- 1 tablespoon Worcestershire sauce
- 2 cloves garlic, minced
- ¾ cup Heidi cheese, grated (*Comte, Gruyere or Swiss also work.)
- Keto bread
Directions:
Heat butter and olive oil to medium heat in a large skillet big enough to fit all the onions. Add the onions, season with salt and pepper, and cook on medium-high heat for about 10 minutes, stirring often. Reduce the heat to low and cook the onions for 30-40 minutes or until they are caramelized.
In a separate pot, add beef broth, thyme, bay leaf, vinegar, and garlic. Turn on the heat to medium and add in the onions. Cook for 30-40 minutes or until soup is dark, thick and flavourful. Add extra salt and pepper to taste. Preheat broiler on low or 450F.
Pour soup into 3 oven-proof bowls. Top with enough keto bread to cover the soup completely then sprinkle each bowl with ¼ cup of grated cheese. Put the bowls of soup in the oven and broil for 3-5 minutes, until the cheese has melted and has a nice golden colour.
Did you make this keto French onion soup recipe? If so, please let me know how it turned out in the comments. Or if you share pics of your creations on Instagram, please tag me so I can see them. Enjoy! :)
