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French Onion Soup with Gruyère Recipe

This vegan French Onion Soup delivers sweet caramelized onions, hearty vegetable broth, and melty plant-based Gruyère on crusty bread.
Print Recipe
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 4 servings
Calories: 220
Ingredients Method Notes

Ingredients
  

  • 4 large yellow onions thinly sliced
  • 3 tbsp olive oil
  • 2 cloves garlic minced
  • 6 cups vegetable broth
  • 1 tsp thyme dried or fresh
  • 1 tbsp balsamic vinegar
  • 1 tsp soy sauce or tamari
  • Salt and black pepper to taste
  • 4 slices crusty baguette
  • 1 cup vegan Gruyère or plant-based melting cheese

Method
 

  1. Heat olive oil in a large pot over medium heat.
  2. Sauté onions slowly, stirring often, until deeply caramelized (35–40 minutes).
  3. Add garlic and cook for 1–2 minutes until fragrant.
  4. Pour in vegetable broth, balsamic vinegar, soy sauce, thyme, salt, and pepper; bring to a simmer.
  5. Simmer for 10 minutes, stirring occasionally.
  6. Toast baguette slices in oven until golden brown.
  7. Ladle soup into oven-safe bowls; top with vegan Gruyère and toast under broiler until melted.
  8. Garnish with extra thyme and serve immediately.

Notes

Nutritional Values (per serving)

  • Calories: 220
  • Total Fat: 9g
  • Saturated Fat: 2g
  • Carbohydrates: 30g
  • Fiber: 5g
  • Protein: 7g

Vitamins & Minerals (per serving)

  • Vitamin A: 15%
  • Vitamin C: 10%
  • Calcium: 20%
  • Iron: 12%
  • Potassium: 10%

Notes & Tips

  • Use a mix of yellow and sweet onions for richer flavor.
  • A splash of sherry or white wine deepens the soup’s complexity.
  • Caramelizing onions slowly prevents bitterness—patience is key.
  • Serve with extra toasted bread for a heartier experience.