Easy French Onion Soup

Flavorful French Onion Soup: A Satisfying Classic Made Simple

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Indulge in the rich and comforting flavors of French Onion Soup with our easy-to-follow recipe. Bursting with caramelized onions, savory broth, and gooey cheese, this dish is the epitome of comfort food perfection. Whether you’re craving a cozy meal on a chilly evening or looking to impress guests with a gourmet appetizer, this recipe is sure to delight your taste buds. So, let’s dive into the kitchen and create some culinary magic!


  • ¼ cup butter
  • 3 tablespoons olive oil, divided
  • 4 large yellow onions (about 5 cups), thinly sliced
  • 1 ½ teaspoons sugar
  • 3 cloves garlic, minced
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • ¾ cup dry white wine
  • 2 teaspoons balsamic vinegar
  • 6 cups beef broth (or vegetable broth for a vegetarian version)
  • 2 bay leaves
  • 8 slices of French baguette
  • 2 cups shredded Gruyère cheese or 4 slices Swiss cheese
  • Fresh chopped parsley for topping (optional)


  1. Caramelize Onions: In a large pot or Dutch oven, melt butter with 2 tablespoons of olive oil over medium heat. Add sliced onions and sugar, stirring occasionally, until onions are golden brown and caramelized, about 30-40 minutes.
  2. Add Garlic and Seasonings: Stir in minced garlic, salt, and black pepper, and cook for an additional 1-2 minutes until garlic is fragrant.
  3. Deglaze with Wine: Pour in dry white wine and balsamic vinegar, scraping up any browned bits from the bottom of the pot. Allow the mixture to simmer for 5-7 minutes to reduce slightly.
  4. Add Broth and Simmer: Pour in beef broth and add bay leaves. Bring the soup to a simmer and let it cook for another 15-20 minutes to allow the flavors to meld together.
  5. Prepare Baguette: Meanwhile, preheat the broiler and arrange baguette slices on a baking sheet. Brush the slices with the remaining olive oil and toast under the broiler until golden brown, about 1-2 minutes per side.
  6. Assemble Soup Bowls: Remove the bay leaves from the soup and discard. Ladle the hot soup into oven-safe bowls and top each with a slice of toasted baguette.
  7. Add Cheese: Sprinkle shredded Gruyère cheese (or place a slice of Swiss cheese) over the baguette slices, covering them completely.
  8. Broil Until Cheese is Melted: Place the soup bowls under the broiler for 2-3 minutes, or until the cheese is bubbly and golden brown.
  9. Serve: Carefully remove the soup bowls from the oven, garnish with fresh chopped parsley if desired, and serve hot.

Cook’s Notes and Variations:

  • Slow Cooker Method: To make this soup in a slow cooker, caramelize the onions on the stovetop, then transfer them to a slow cooker. Add the remaining ingredients (except for the bread and cheese) and cook on low for 6-8 hours or on high for 3-4 hours. Follow steps 5-9 to finish the soup.
  • Vegetarian Version: Use vegetable broth instead of beef broth for a vegetarian-friendly option. You can also omit the cheese or use a plant-based cheese alternative to make it vegan.
  • Add Depth of Flavor: For an extra depth of flavor, add a splash of brandy or cognac to the soup before simmering.

Keto and Low Carb Versions:

  • Keto Option: To make this soup keto-friendly, omit the sugar and use low-carb bread or skip the bread entirely. Replace the dry white wine with additional beef broth or use a dry white wine labeled as keto-friendly. Use a keto-friendly cheese such as cheddar or mozzarella for topping.
  • Low Carb Option: Follow the keto option above, and additionally, reduce the amount of onions used to lower the carb content. You can also use a low-carb sweetener such as erythritol or monk fruit instead of sugar.

Frequently Asked Questions (FAQs):

Q: Can I use yellow onions instead of white onions?

A: Yes, yellow onions can be used interchangeably with white onions in this recipe. They will add a slightly sweeter flavor to the soup.

Q: How can I make this soup gluten-free?

A: To make this soup gluten-free, use gluten-free bread for the baguette slices or omit the bread entirely. Ensure that the beef broth used is labeled as gluten-free.

Q: Can I make this soup ahead of time?

A: Yes, this soup can be made ahead of time and stored in the refrigerator for up to 3 days. Reheat it on the stovetop or in the microwave before serving, then add the bread and cheese toppings just before broiling.

Q: Can I freeze leftover French Onion Soup?

A: While the soup can be frozen, the texture of the cheese may change upon reheating. It’s best to consume leftover soup within a few days for the best taste and texture.

Q: What can I serve with French Onion Soup?

A: French Onion Soup pairs well with a side salad, crusty bread, or a charcuterie board for a complete meal.

With its soul-warming flavors and hearty ingredients, our Easy French Onion Soup is the perfect dish to cozy up with on a chilly day or impress guests with at your next dinner party. From the caramelized onions to the gooey cheese topping, every spoonful is a delight for the senses. So, whip up a batch of this classic soup, grab a bowl and spoon, and savor the comforting goodness with every bite. Your taste buds will thank you!

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