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Longhorn French Onion Soup Recipe

Longhorn French Onion Soup Recipe

Master the Longhorn French Onion Soup recipe with this easy, flavorful guide. Perfect comfort food for any occasion. Dive in now!
Prep Time 15 minutes
Cook Time 1 hour 29 minutes
Total Time 1 hour 45 minutes
Course Soup
Cuisine American, French
Servings 6
Calories 350 kcal

Ingredients
  

  • 4 large Yellow Onions thinly sliced
  • 2 tablespoons Olive Oil
  • 2 tablespoons Butter
  • 1 teaspoon Fresh Thyme
  • 8 cups Beef Broth
  • 2 Bay Leaves
  • Salt to taste
  • Pepper to taste
  • 1 tablespoon Whole Grain Mustard
  • 1 1/2 cups Gruyère Cheese grated
  • 6 slices Baguette sliced and toasted

Instructions
 

Preparing the Base

  • Start with the Onions: In your large soup pot, combine the olive oil and butter over medium heat until the butter is melted. Add the thinly sliced onions and a pinch of salt, and cook, stirring occasionally, until the onions are golden brown and caramelized. This process is the heart of the Longhorn French Onion Soup recipe and can take about 30-45 minutes. Patience is key here; think of it as browning your onions to golden perfection.
  • Add Flavor: Once the onions have achieved a rich, caramel color, stir in the fresh thyme and cook for another minute. The aroma at this stage is your kitchen’s way of thanking you.

Building the Soup

  • Broth Time: Add the beef broth, bay leaves, and whole grain mustard to the pot. Season with salt and pepper to taste. Once the mixture starts to boil, lower the heat and let it cook slowly for around 30 minutes. This simmering is when the magic happens, infusing every spoonful with depth and character.
  • Preheat the Oven: While the soup simmers, preheat your oven to 350°F (175°C). This is in preparation for the grand finale – the cheese topping.

The Grand Finale

  • Cheese & Bread: Ladle the soup into oven-proof bowls. Top each with a slice of toasted baguette and a generous amount of grated Gruyère cheese.
  • Broil to Perfection: Place the bowls under the broiler for a few minutes, just until the cheese is bubbly and golden brown. Keep a close eye on them; like a good plot twist, the transformation from bubbly to burnt can happen quickly!
Keyword Longhorn French Onion Soup Recipe