Need something light, filling, and yet satisfying? How about French onion soup? This mouthwatering, Americanized version is super quick to make and full of nourishing ingredients!
Ah, the Frenchman. He loves his rich foods. Rich and creamy sauces, deeply flavored broths and very well seasoned meats. It keeps me on my culinary toes.
While I love to create food and work in the kitchen, there are days when simple needs to happen. When I say “simple”, I mean a meal that takes one pot, less than 20 minutes of prep and cooking time, and easy clean up. It HAS to meet these standards, as well as be nourishing for the body, mind, and even soul.
Homemade bone broth is the base of this delicious soup. Bone broth has so many nourishing benefits to it. They include:
- Treat leaky gut syndrome
- Overcome food intolerances and allergies
- Improve joint health
- Reduce cellulite
- Boost immune system
Although onions are typically higher in carbs, they are also high in vitamin C, chromium, and antioxidants. This makes them a must have in your diet, even if only occasionally. The nutrients are very powerful in just a few carbs.
This low carb French onion soup is just what the chef ordered.
It has rich homemade beef broth made from beef bones, caramelized onions, with a blend of seasonings that go together like peanut butter and jelly. Or eggs and bacon. Or strawberries and whipped cream. You get the idea.
To get the recipe for your own homemade beef stock, read the post here.
Top it off with crispy, stretchy cheese and you have a complete, satisfying keto soup!
Now, traditionally, French onion soup is made with a lot more onions, red wine, and is served over crusty French baguette slices in the bowl. It is also most commonly topped with provolone cheese or guyere cheese.
To keep this a keto french onion soup, we are leaving out the red wine, the French bread and cutting the amount of onions down. Instead of crusty French bread, we are serving this over cloud bread. Making it more budget friendly, we are swapping out the more expensive cheeses and topping this with mozzarella cheese. This isn’t French at all, but it’s the Americanized version, so to speak. Browned bits of stretchy mozzarella cheese taste amazing, by the way!
This soup only takes about 30 minutes, start to finish, making it perfect for a weeknight supper. It also freezes fairly well, if you want to make a larger batch ahead of time and freeze it for another quick and easy meal.
So, how many carbs in French onion soup?
This low carb version only has 6 net carbs per serving. The onions and garlic are full of Vitamin C, making the carbs a healthy choice. For a 1/2 cup serving size, there are about 7 net carbs in the onions. If you are concerned about the number of carbs in onions, you can cut the amount in the recipe to only 1 onion. If you cut the amount of onions down, the net carbs per serving will go down to 4.
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Ingredients
- 3 Tablespoons butter
- 2 garlic cloves, crushed
- 2 small onions, sliced
- 1 Tablespoon Worcestershire sauce
- 4 cups beef broth
- 1 teaspoon salt
- 1 teaspoon black pepper
- 2 Tablespoons fresh rosemary
- 1 cup shredded mozzarella cheese, divided
Instructions
- Melt the butter in a heavy bottomed pot over medium heat.
- Add onions and garlic, and sautee for 5-7 minutes until onions are carmelized.
- Pour the Worcestershire sauce over the vegetables and deglaze the pan.
- Add in beef broth, rosemary, salt and pepper, and stir well. Bring to a boil, then turn heat down to medium low.
- Simmer for 10 minutes over medium low heat to allow flavors to meld.
- If serving over cloud bread, place a cloud bread piece in each bowl.
- Top with soup.
- Sprinkle 1/4 cup of cheese over each bowl.
- Place under broiler for 7 minutes until cheese is melted and golden brown.
- Serve immediately.
Do you love French onion soup? What’s your favorite soup on a busy weeknight?
French Onion Soup

Ingredients
- 3 Tablespoons butter
- 2 garlic cloves, crushed
- 2 small onions, sliced
- 1 Tablespoon Worcestershire sauce
- 4 cups beef broth
- 1 teaspoon salt
- 1 teaspoon black pepper
- 2 Tablespoons fresh rosemary
- 1 cup shredded mozzarella cheese, divided
Instructions
- Melt the butter in a heavy bottomed pot over medium heat.
- Add onions and garlic, and sautee for 5-7 minutes until onions are carmelized.
- Pour the Worcestershire sauce over the vegetables and deglaze the pan.
- Add in beef broth, rosemary, salt and pepper, and stir well.
- Simmer for 10 minutes over medium low heat to allow flavors to meld.
- If serving over cloud bread, place a cloud bread piece in each bowl.
- Top with soup.
- Sprinkle 1/4 cup of cheese over each bowl.
- Place under broiler for 7 minutes until cheese is melted and golden brown.
- Serve immediately.
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Nutrition Information:
Yield:
4Serving Size:
1Amount Per Serving: Calories: 180 Total Fat: 14g Saturated Fat: 8g Trans Fat: 1g Unsaturated Fat: 4g Cholesterol: 37mg Sodium: 1680mg Carbohydrates: 7g Fiber: 1g Sugar: 2g Protein: 9g
Zach
Some of Zach's favorite keto resources include:
Perfect Keto: For those who are looking for easy supplements that support a Keto diet, Perfect Keto offers a variety of products that make it easy to stay in ketosis including keto bars, whey protein, and keto nootropics.
KetoLogic: For those who have a sweet tooth, KetoLogic sells keto-friendly chocolate candies with only 1g of net carbs & zero added sugars.
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Hi. I love French onion soup and your Keto version sounds good but I have a questions. How many servings does this make because I’m try to judge how many onions actually end up per serving? I don’t want to serve an onion broth style soup.
Thanks,
Coleen
This recipe serves 4. Thanks for being here!