Keto French Onion Soup

Keto French Onion Soup

Indulge in the cozy flavors of classic French Onion Soup without worrying about your carb intake. This Keto French Onion Soup recipe brings all the rich, savory goodness you love, with a low-carb twist. It’s the ultimate comfort food for those following a ketogenic lifestyle.

Preparation Time: 10 minutes
Cooking Time: 1 hour
Serves: 4
Difficulty: Intermediate
Course: Appetizer
Cuisine: Keto, Low-Carb


  • 4 large onions, thinly sliced
  • 4 tbsp unsalted butter
  • 4 cups beef broth (check for no added sugars)
  • 1/2 cup dry white wine (optional)
  • 1 tsp thyme leaves
  • Salt and black pepper to taste
  • 1 cup shredded Gruyère cheese (for topping)
  • 2 tbsp olive oil (for caramelizing the onions)
  • 1 clove garlic, minced (for seasoning)
  • 1 bay leaf


  1. Caramelize the Onions: In a large soup pot, heat the olive oil and 2 tablespoons of butter over medium-low heat. Add the thinly sliced onions and cook slowly, stirring occasionally, until they turn a deep golden brown and caramelized, about 45 minutes to 1 hour. Be patient; this step is crucial for the soup’s flavor.
  2. Season the Onions: Add minced garlic and thyme leaves to the caramelized onions. Stir and cook for an additional 2-3 minutes until fragrant.
  3. Deglaze with Wine (optional): Pour in the white wine (if using) to deglaze the pot, scraping up any browned bits from the bottom.
  4. Add Broth and Bay Leaf: Pour in the beef broth and add the bay leaf. Bring the soup to a boil, then reduce the heat and let it simmer for 20-25 minutes to allow the flavors to meld. Season with salt and black pepper to taste.
  5. Serve: Ladle the hot Keto French Onion Soup into oven-safe bowls. Top each bowl with a generous sprinkle of shredded Gruyère cheese.
  6. Broil and Serve: Preheat your oven’s broiler. Place the bowls on a baking sheet and broil until the cheese is bubbly and golden brown, about 2-3 minutes.

Note: Be cautious when transferring the soup bowls to the broiler, as they will be hot.

Nutrition Facts (per serving):

  • Calories: 350
  • Fat: 27g
  • Protein: 9g
  • Total Carbs: 11g
  • Net Carbs: 7g
  • Fiber: 4g
  • Sugar: 5g

For more keto recipes and meal plans tailored to your needs, check out the Custom Keto Meal Plan and the 28-Day Keto Challenge. Enjoy this Keto French Onion Soup as a warm and satisfying start to your keto meal!


Leave a Comment