French Onion Soup Recipe

Why You’ll Love This Recipe

French Onion Soup is a comforting and flavorful dish that combines caramelized onions, rich beef broth, and a crispy, cheesy topping. This classic French dish is perfect for cold days, special occasions, or when you’re craving something warm and savory. The combination of sweet onions, umami-rich broth, and melted Gruyère cheese creates an irresistible bowl of soup that is sure to impress.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

• Yellow onions
• Butter
• Olive oil
• Garlic
• Sugar
• All-purpose flour
• Beef broth
• Dry white wine
• Worcestershire sauce
• Bay leaf
• Fresh thyme
• Salt and black pepper
• Baguette slices
• Gruyère cheese
• Parmesan cheese

Directions

1. Caramelize the onions: In a large pot, heat butter and olive oil over medium heat. Add sliced onions and cook slowly, stirring occasionally, until they are deeply caramelized, about 40 minutes.
2. Add garlic and flour: Stir in the minced garlic and cook for a minute. Sprinkle in the flour and mix well, cooking for another minute to remove the raw flour taste.
3. Deglaze the pot: Pour in the dry white wine and scrape the bottom of the pot to release any browned bits.
4. Simmer the broth: Add the beef broth, Worcestershire sauce, bay leaf, and fresh thyme. Season with salt and black pepper to taste. Let the soup simmer for about 30 minutes.
5. Prepare the bread and cheese: While the soup is simmering, slice the baguette and toast the slices until golden brown.
6. Assemble and broil: Ladle the soup into oven-safe bowls. Place toasted baguette slices on top and generously sprinkle with Gruyère and Parmesan cheese. Broil until the cheese is melted and bubbly.
7. Serve hot: Carefully remove from the oven and serve immediately.

Servings and Timing

• Servings: 4-6
• Prep Time: 10 minutes
• Cook Time: 1 hour
• Total Time: 1 hour 10 minutes

Variations

• Vegetarian Option: Substitute vegetable broth for beef broth.
• Different Cheese: Swap Gruyère with Swiss, provolone, or mozzarella.
• Herb Infusion: Add rosemary or oregano for a unique twist.
• Gluten-Free: Use gluten-free bread and a gluten-free flour alternative.
• Spicy Kick: Add a pinch of red pepper flakes for a little heat.

Storage/Reheating

• Storage: Store leftover soup in an airtight container in the refrigerator for up to 4 days.
• Freezing: The soup (without the bread and cheese topping) can be frozen for up to 3 months. Reheat on the stove before serving.
• Reheating: Warm the soup on the stovetop over medium heat until hot. Toast fresh bread and add cheese before broiling again for the best texture.

FAQs

How do I get the onions to caramelize properly?

Cook them slowly over medium heat, stirring occasionally, and be patient. It takes time for the natural sugars to develop a deep, golden brown color.

Can I make this soup ahead of time?

Yes! The soup base can be made a day in advance and stored in the refrigerator. Reheat before adding the bread and cheese topping.

What kind of onions should I use?

Yellow onions are best for French Onion Soup as they have the perfect balance of sweetness and depth of flavor.

Can I use chicken broth instead of beef broth?

Yes, but the flavor will be lighter. For a richer taste, stick with beef broth.

What can I substitute for wine?

You can use additional beef broth or a splash of apple cider vinegar for acidity.

Do I have to use oven-safe bowls?

Yes, since the final step involves broiling, the bowls should be heatproof to prevent breaking.

What is the best bread for this soup?

A baguette works best since it toasts well and holds up in the soup.

Can I make this soup without flour?

Yes, but the flour helps thicken the soup slightly. You can omit it or use cornstarch as an alternative.

Why does my soup taste bitter?

If the onions burn instead of caramelizing, they can turn bitter. Make sure to cook them low and slow.

How can I make this dish extra cheesy?

Double the cheese and broil for an extra minute or two until it forms a golden, crispy crust.

Conclusion

French Onion Soup is a timeless comfort food that never fails to impress. With its deep, caramelized onion flavor, rich broth, and cheesy, toasted topping, it is the perfect dish to warm up any day. Whether you’re making it for a special occasion or just a cozy night in, this recipe is easy to follow and delivers delicious results every time.

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