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Keto French Onion Soup

Bone Broth French Onion Soup

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4 tbsp unsalted butter
1 pound peeled and sliced onions
2 garlic cloves, minced
½ tsp baking soda
4 cups homemade beef broth
2 sprigs thyme
1 bay leaf
2 tbsp apple cider vinegar
1 ½ cup shredded Gruyère cheese
fresh thyme leaves, for garnish


  1. In a large Dutch oven melt the butter over medium heat.
  2. Add the onions and garlic and cook, string occasionally, until softened, about 8 minutes.
  3. Lower the heat to medium low, add the bay leaf and thyme sprigs and stir in the baking soda.
  4. Cover with a lid and cook, stirring frequently, until the onions are sweet and golden brown, 1 to 2 hours.
  5. Discard the thyme sprigs and bay leaf.
  6. Add the beef broth.
  7. Raise the heat to medium high and bring to a boil.
  8. Lover the heat and simmer for 20 minutes.
  9. Add the apple cider vinegar and season with salt and black pepper to taste.
  10. Preheat the broiler and adjust oven rack to top position.
  11. Divide the soup between 6 ovenproof serving bowls, then top each one with ¼ cup shredded Gruyere cheese.
  12. Place the bowls on a baking sheet.
  13. Broil until the cheese is melted.
  14. Garnish with fresh thyme leaves and serve.


Keywords: soup, french onion, bone broth

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