Easy French Onion Soup

Dive into Comfort with Easy French Onion Soup

Experience the warmth and richness of a classic French bistro with our Easy French Onion Soup recipe. This soul-warming dish combines caramelized onions, savory beef broth, and melted cheese atop toasted baguette slices for a truly comforting meal. Perfect for chilly evenings or elegant gatherings, this soup is sure to impress with its depth of flavor and simplicity. Let’s embark on a culinary journey to the streets of Paris as we explore the art of French Onion Soup!


  • 1/4 cup butter
  • 3 tablespoons olive oil, divided
  • 4 large yellow onions (about 5 cups), thinly sliced
  • 1 1/2 teaspoons sugar
  • 3 cloves garlic, minced
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 3/4 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, melt butter and 2 tablespoons of olive oil over medium heat. Add thinly sliced onions and sugar, stirring occasionally until onions are caramelized and golden brown, about 30-40 minutes.
  2. Add Aromatics: Stir in minced garlic, salt, and black pepper, cooking for an additional 1-2 minutes until fragrant.
  3. Deglaze Pan: Pour in dry white wine and balsamic vinegar, scraping the bottom of the pot to loosen any browned bits. Cook for 2-3 minutes to allow the alcohol to evaporate.
  4. Simmer Soup: Add beef broth and bay leaves to the pot, bringing the mixture to a simmer. Allow the soup to simmer for 20-30 minutes to allow the flavors to meld together.
  5. Prepare Bread: While the soup simmers, preheat the oven broiler. Brush baguette slices with remaining olive oil and place them on a baking sheet. Toast under the broiler for 1-2 minutes per side, until golden brown.
  6. Assemble Soup: Ladle the hot soup into oven-safe bowls. Top each bowl with a toasted baguette slice and sprinkle generously with shredded Gruyère or Swiss cheese.
  7. Broil Cheese: Place the bowls of soup under the broiler for 2-3 minutes, until the cheese is melted and bubbly.
  8. Serve: Carefully remove the bowls from the oven and garnish with fresh chopped parsley if desired. Serve hot and enjoy the luxurious flavors of French Onion Soup!

Cook Notes and Variations:

  • Vegetarian Version: Substitute beef broth with vegetable broth for a vegetarian-friendly version of this soup.
  • Cheese Options: Experiment with different types of cheese such as mozzarella, provolone, or even cheddar for a unique twist on this classic dish.
  • Add Depth: Enhance the flavor of the soup by adding a splash of Worcestershire sauce or a sprinkle of thyme during the simmering process.

Keto and Low-Carb Versions:

  • Keto Option: Skip the baguette slices or use low-carb bread alternatives such as almond flour bread or cloud bread. Opt for a dry white wine with low residual sugar content or omit it altogether. Use a keto-friendly sweetener such as erythritol instead of sugar for caramelizing the onions.
  • Low-Carb Option: Similarly, reduce the amount of onions and substitute them with low-carb vegetables such as cauliflower or bell peppers. Use a homemade beef or vegetable broth with no added sugars or carbohydrates.

Frequently Asked Questions (FAQs):

  1. Can I use store-bought broth instead of making it from scratch? Yes, you can use store-bought beef or vegetable broth as a convenient alternative. Look for low-sodium options to control the salt content of the soup.
  2. What can I use if I don’t have bay leaves? If you don’t have bay leaves on hand, you can omit them from the recipe. Bay leaves add a subtle flavor but are not essential to the overall taste of the soup.
  3. Can I make this soup ahead of time? Yes, French Onion Soup can be made ahead of time and stored in the refrigerator for up to 3 days. Reheat it gently on the stovetop or in the microwave before serving.
  4. How can I prevent the cheese from sticking to the bowl? To prevent the cheese from sticking to the bowl, you can lightly grease the edges of the bowls with cooking spray or butter before adding the soup and cheese.

In conclusion, Easy French Onion Soup offers a taste of elegance and comfort in every spoonful, making it a timeless classic for any occasion. With its rich, savory broth, sweet caramelized onions, and gooey melted cheese, it’s a dish that’s sure to warm both body and soul. Whether you’re serving it as a starter for a dinner party or enjoying it as a cozy meal at home, French Onion Soup never fails to delight with its luxurious flavors and rustic charm. So gather your ingredients, don your apron, and prepare to savor the culinary magic of Easy French Onion Soup. Bon appétit!

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