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French Onion Soup with Gruyere and Baguette

French Onion Soup with Gruyere and Baguette

French Onion Soup with Gruyere and Baguette is a warm, rich, and comforting classic French dish featuring deeply caramelized yellow onions in a savory broth, topped with toasted baguette slices and melted nutty Gruyere cheese. Perfect for chilly evenings or whenever craving a wholesome, flavor-packed meal.

  • Total Time: 1 hour 30 minutes
  • Yield: 4 servings 1x

Ingredients

Scale

Vegetables & Herbs

  • 6 large yellow onions, thinly sliced
  • 2 sprigs fresh thyme
  • 2 bay leaves
  • Fresh chopped parsley or chives for garnish (optional)

Fats & Oils

  • 3 tablespoons butter
  • 1 tablespoon olive oil

Liquids

  • 6 cups beef broth or vegetable broth
  • 1 cup dry white wine or dry sherry

Bread & Cheese

  • 1 baguette, sliced into thin rounds
  • 2 cups grated Gruyere cheese

Seasonings

  • Salt, to taste
  • Black pepper, to taste

Instructions

  1. Caramelize the Onions: Slice the yellow onions thinly. Heat butter and olive oil in a large pot over medium heat. Add the onions and stir occasionally for about 40 minutes, cooking slowly until they turn a deep, golden-brown color. This slow caramelization develops the soup’s rich and deep flavor.
  2. Deglaze with Wine: Pour in the dry white wine or sherry to deglaze the pot. Use a wooden spoon to scrape up all the browned bits sticking to the bottom. This adds acidity and lifts the deep flavors from the onions.
  3. Add Broth and Simmer: Add the beef or vegetable broth along with fresh thyme sprigs and bay leaves. Bring to a gentle simmer and cook for 30 minutes to meld the flavors into a fragrant, savory broth.
  4. Prepare the Baguette and Cheese: While the soup simmers, slice the baguette into thin rounds and toast until crisp and golden. Grate the Gruyere cheese in preparation for topping.
  5. Assemble and Broil: Ladle the hot soup into oven-safe bowls. Place toasted baguette slices on top of the soup, then generously sprinkle with grated Gruyere. Place the bowls under a broiler for a few minutes until the cheese melts, bubbles, and turns golden brown, forming a delicious crust.

Notes

  • Use patience to slowly caramelize the onions thoroughly for the best flavor.
  • Choose quality authentic Gruyere for superior meltability and flavor.
  • Toast baguette slices well to prevent sogginess in the soup.
  • Season gradually, tasting as you go to avoid over-salting.
  • Use oven-safe bowls capable of withstanding broiling heat.
  • Variations: Use vegetable broth for vegetarian, plant-based cheese and vegan butter for vegan, gluten-free bread for gluten-free versions.
  • If you don’t have a broiler, use a very hot oven or a kitchen torch to melt and brown the cheese.
  • Author: Lina
  • Prep Time: 20 minutes
  • Cook Time: 1 hour 10 minutes
  • Category: Appetizers
  • Method: Baking
  • Cuisine: French
  • Diet: Gluten Free (with gluten-free bread substitution)

Nutrition

  • Serving Size: 1 bowl (approx. 1.5 cups soup plus bread and cheese)
  • Calories: 380 kcal
  • Sugar: 7 g
  • Sodium: 900 mg
  • Fat: 22 g
  • Saturated Fat: 13 g
  • Unsaturated Fat: 7 g
  • Trans Fat: 0 g
  • Carbohydrates: 30 g
  • Fiber: 3 g
  • Protein: 15 g
  • Cholesterol: 55 mg

Keywords: French Onion Soup, Gruyere, Baguette, Caramelized Onions, Comfort Food, French Cuisine, Soup, Gluten-Free Option, Vegetarian, Vegan Variation