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Keto French Onion Soup

Keto French Onion Soup

A rich, hearty soup with caramelized onions and melted cheese, made low-carb for keto lovers. Perfectly cozy and flavourful!
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Prep Time 15 minutes
Cook Time 50 minutes
Resting Time 5 minutes
Total Time 1 hour 10 minutes
Servings: 4 Persons
Course: Soup
Cuisine: French
Calories: 310
Ingredients Equipment Method Notes

Ingredients
  

  • 4 large yellow onions, thinly sliced
  • 3 tbsp butter
  • 2 tbsp olive oil
  • 4 cups beef broth (low-sodium)
  • 1 cup chicken broth
  • 1 tsp garlic, minced
  • 1 tsp thyme (fresh or dried)
  • 2 bay leaves
  • Salt and pepper to taste
  • 1 cup shredded Gruyère or mozzarella cheese
  • Keto bread slices or almond flour bread (optional for topping)

Equipment

  • 1 Large heavy-bottomed pot or Dutch oven
  • 1 Wooden spoon
  • 1 Ladle
  • 1 Oven-safe soup bowls
  • 1 Cheese grater

Method
 

  1. Caramelize the Onions: Add the butter and the olive oil to a large pot over medium heat. Add sliced onions and cook slowly, tossing them often, until the onions are soft, golden-brown and caramelized (about 25 – 30 minutes).
  2. Season: Fold in garlic, thyme, salt, and pepper. Fry for 2 minutes until fragrant.
  3. Simmer Broth: Pour in beef broth and chicken broth, then add bay leaves, and let the soup to simmer for 20 minutes, to infuse all the flavors.
  4. Prepare Bowls: Ladle the hot soup into oven-safe bowls, then place a slice of keto bread (optional) on top.
  5. Add Cheese: Sprinkle generously with shredded Gruyère or mozzarella cheese.
  6. Broil and Serve: Put under a broiler until cheese is melted and bubbly. Let stand 5 minutes before serving hot.

Notes

  • Use a combination of beef and chicken broth for depth of flavour.
  • Caramelising onions requires patience, for sure — low and slow yields the sweetest, most flavourful results.
  • Sprinkle in a little dry white wine (if you have any) for authentic flavour.
  • Opt for Gruyère cheese for the most classic taste.
  • Only bake it in oven-safe bowls, and broil it for the cheesy crust.