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French Onion Soup

A soul-warming dish with deeply caramelized onions, rich beef broth, and a luxurious layer of melted Gruyère cheese, perfect for any occasion.
Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Course Appetizer, Main Course, Soup
Cuisine French
Servings 4 servings
Calories 450 kcal

Ingredients
  

Main Ingredients

  • 4 large onions, thinly sliced These fragrant gems will transform from sharp and pungent to sweet and caramelized.
  • 4 tablespoons butter Forms the luscious base for the onions.
  • 1 tablespoon olive oil Enhances the butter’s richness.
  • 1 teaspoon salt Essential for drawing out moisture in the onions.
  • 1 teaspoon sugar Accelerates caramelization.
  • 8 cups beef broth Provides the soup's luxurious foundation.
  • 1/2 cup dry white wine Optional, adds bright acidity.
  • 1 teaspoon thyme Imparts delightful earthiness.
  • 1 baguette, sliced baguette, sliced Adds a satisfying crunch.
  • 2 cups grated Gruyère cheese Creates a gooey topping.

Instructions
 

Preparation

  • In a large pot, combine the butter and olive oil over medium heat.
  • Add the thinly sliced onions, salt, and sugar, stirring gently.

Cooking

  • Cook the onions for 30-40 minutes until deeply caramelized.
  • Add the white wine (if using) and deglaze the pot by scraping the bottom.
  • Pour in the beef broth and add the thyme. Bring to a gentle simmer for 15-20 minutes.

Broiling and Serving

  • Preheat the broiler to high.
  • Ladle the soup into oven-safe bowls, top with baguette slices, and sprinkle with Gruyère cheese.
  • Broil until the cheese is melted and bubbling, then serve immediately.

Notes

For a lighter version, use vegetable broth and low-fat cheese. Can be made ahead and reheated. Freezing is possible without cheese.
Keyword Cheese, Comfort Food, French Onion Soup, Onions, Soups