Soups & Drinks

French Onion Soup with Gruyere Cheese

Name: French Onion Soup with Gruyere Cheese
Prep time: 20 min
Cook time: 1 h 10 min
Total time: 1 h 30 min
Yield: 6
Ingredients: 5 large yellow onions, thinly sliced; 3 tbsp unsalted butter; 2 tbsp olive oil; 1 tsp sugar; 1 tsp salt; 3 garlic cloves, minced; 8 cups beef broth; ½ cup dry white wine; 2 tsp fresh thyme; 2 bay leaves; Black pepper, freshly ground, to taste; 1 French baguette, sliced into ½-inch rounds; 2 cups Gruyere cheese, grated; ½ cup Parmesan cheese, grated

Servings: 6 Total Time: 1 hr 30 mins Difficulty: Beginner

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Introduction

French Onion Soup is one of the most classic and comforting dishes in French cuisine. Made with deeply caramelized onions simmered in a flavorful beef broth, and topped with a crusty slice of baguette smothered in melted Gruyere cheese, this soup is the epitome of cozy, rustic elegance. Its rich, savory flavor, gooey cheese topping, and hearty texture make it a timeless favorite across the world.

Why I Love This Recipe

I love this recipe because it captures everything I adore about French cooking: simple ingredients transformed into something luxurious through patience and technique. The slow caramelization of onions fills the kitchen with an irresistible aroma, and when you take that first spoonful — with gooey cheese, crispy bread, and rich broth — it feels like a warm hug in a bowl. It’s comforting enough for a casual dinner yet elegant enough to impress at a dinner party.

Why This is a Must-Try Dish

French Onion Soup with Gruyere Cheese is a must-try because:

It teaches the art of caramelizing onions — patience rewarded with incredible depth of flavor.
The combination of textures — silky broth, chewy bread, and melty cheese — is unmatched.
It’s budget-friendly yet tastes luxurious.
Perfect for cold evenings or when you want something hearty and soul-warming.

Recipe Overview

Preparation Time: 20 minutes
Cooking Time: 1 hour 10 minutes
Total Time: 1 hour 30 minutes
Servings: 6 bowls
Calories: ~400 kcal per serving

Cuisine & Course

Cuisine: French
Course: Appetizer / Main Soup Dish

Ingredients

For the Soup:

5 large yellow onions, thinly sliced
3 tbsp unsalted butter
2 tbsp olive oil
1 tsp sugar (helps caramelization)
1 tsp salt
3 garlic cloves, minced
8 cups beef broth (or a mix of beef + chicken for lighter flavor)
½ cup dry white wine (or sherry)
2 tsp fresh thyme (or 1 tsp dried thyme)
2 bay leaves
Black pepper, freshly ground, to taste

For the Topping:

1 French baguette, sliced into ½-inch rounds
2 cups Gruyere cheese, grated
½ cup Parmesan cheese, grated (optional for extra flavor)

Simple Cooking Directions

Slowly caramelize onions until golden brown.
Add garlic, deglaze with wine, then add broth, thyme, and bay leaves. Simmer until rich and flavorful.
Toast baguette slices.
Ladle soup into oven-safe bowls, top with bread and cheese, and broil until bubbly and golden.

Step-by-Step Preparation Method

Step 1: Caramelize the Onions

Heat butter and olive oil in a heavy-bottomed pot over medium-low heat.
Add sliced onions, salt, and sugar.
Cook slowly for 35–40 minutes, stirring often, until onions turn deep golden brown.

Step 2: Build the Soup Base

Add garlic and sauté for 1 minute.
Deglaze the pot with white wine, scraping up browned bits.
Add broth, thyme, bay leaves, and pepper.
Simmer uncovered for 30 minutes.
Remove bay leaves and adjust seasoning.

Step 3: Prepare the Bread

Preheat oven to 375°F (190°C).
Place baguette slices on a baking sheet and toast for 8–10 minutes until crisp.

Step 4: Assemble and Broil

Ladle hot soup into oven-safe bowls.
Place 1–2 baguette slices on top.
Sprinkle generously with Gruyere cheese (and Parmesan, if using).
Broil for 3–5 minutes until cheese melts and turns golden brown.

How to Serve

Serve hot, straight from the oven, with extra toasted bread on the side.
Garnish with fresh thyme or cracked black pepper for added elegance.
Pair with a crisp green salad and a glass of white wine for a complete French-inspired meal.

Additional Recipe Tips

Caramelize onions slowly; rushing will burn them.
Use oven-safe bowls for the final broiling step.
Beef broth gives the richest flavor, but you can mix with chicken broth for balance.
Gruyere is classic, but Emmental, Comté, or even Swiss cheese can be substituted.

Variations

Vegetarian French Onion Soup: Use vegetable broth instead of beef.
Vegan: Replace butter with olive oil and use dairy-free cheese.
Extra Rich: Add a splash of brandy or cognac before simmering.
Rustic Style: Skip the broiling step and serve with bread on the side.

Freezing & Storage

Storage: Keep leftover soup (without bread/cheese topping) in an airtight container in the refrigerator for up to 4 days.
Freezing: Freeze cooled soup (without bread/cheese) for up to 3 months. Thaw overnight in the fridge before reheating.
Reheating: Warm gently on the stove, then add fresh bread and cheese before serving.

Special Equipment Needed

Heavy-bottomed pot or Dutch oven (for caramelizing onions)
Oven-safe soup bowls (for broiling cheese topping)
Baking sheet (for toasting bread)
Broiler or oven with broil function

Conclusion

French Onion Soup with Gruyere Cheese is a timeless classic that embodies the heart of French comfort food. With its rich broth, caramelized onions, crusty bread, and gooey melted cheese, it’s a dish that never fails to impress. Whether you’re serving it as a starter for an elegant dinner or enjoying it as a cozy main course on a chilly night, this soup is a true culinary masterpiece worth making again and again.

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