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Longhorn French Onion Soup Recipe
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Longhorn French Onion Soup Recipe

There’s something so warm and comforting about a bowl of Longhorn French Onion Soup Recipe. The rich, savory broth combined with the sweetness of caramelized onions, all topped with a layer of gooey melted cheese—it's like a cozy hug in a bowl.
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Prep Time 10 minutes
Cook Time 1 hour
Servings: 6
Course: Soup
Cuisine: American, French
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

  • Onions = 06 large thinly sliced
  • Unsalted Butter = 04 tablespoons
  • Olive Oil = 02 tablespoons
  • Sugar = 01 tablespoon
  • Flour = 01 tablespoon
  • Beef = 08 cups broth
  • Dry White Wine = 1/2 cup Optional
  • Leaves = 02 bay
  • Thyme = 01 teaspoon dried
  • Salt and Pepper to taste
  • Baguette = 01 sliced
  • Gruyère Cheese = 02 cups grated

Equipment

  • Large Pot or Dutch Oven
  • Wooden Spoon
  • Ladle (for Serving)
  • Oven-Safe Bowls (for serving)
  • Baking Sheet
  • Sharp Knife (for slicing onions)
  • Cheese Grater 

Method
 

  1. Step by Step Instructions:
Step 1: Caramelize the Onions
  1. Melt the butter with olive oil in a large pot.
  2. Add sliced onions and sugar, then cook slowly, stirring often.
  3. Continue until the onions turn golden and caramelized.
  4. This will take about 30-40 minutes.
Step 2: Add the Flour
  1. Sprinkle flour over the caramelized onions and stir well.
  2. Cook for 2-3 minutes to remove the raw flour taste.
Step 3: Add Broth and Seasonings
  1. Pour in the beef broth and white wine, if using.
  2. Add bay leaves, thyme, salt, and pepper.
  3. Stir everything together, then bring the mixture to a boil.
  4. Once boiling, reduce the heat, cover, and simmer for 30 minutes.
Step 4: Prepare the Bread and Cheese
  1. Preheat the oven to 350°F (175°C).
  2. Place baguette slices on a baking sheet and toast until golden, about 10 minutes.
  3. Remove from the oven and set aside.
Step 5: Serve the Soup
  1. Ladle the hot soup into oven-safe bowls.
  2. Place a toasted baguette slice on top.
  3. Generously sprinkle grated Gruyère cheese over the bread.
Step 6: Broil the Cheese
  1. Turn on the broiler.
  2. Place the bowls on a baking sheet and broil.
  3. Watch carefully as the cheese melts and turns golden, which will take just a few minutes.
Step 7: Enjoy!
  1. Carefully remove the hot bowls from the oven.
  2. Serve immediately and enjoy your homemade Longhorn French Onion Soup.
Servings and Preparation Times
  1. Preparation Time: 10 minutes
  2. Cooking Time: 1 hour (including caramelizing onions)
  3. Total Time: 1 hour 10 minutes
  4. Serves: This recipe makes about 6 servings, depending on the portion size. It’s perfect for a family dinner or to serve as a starter for a special meal.

Notes

  • Caramelize the Onions Slowly: The key to a great French onion soup is perfectly caramelized onions. Take your time with this step—cooking the onions slowly over low heat allows them to develop a deep, sweet flavor.
  • Use Good Quality Beef Broth: Since the broth is the base of your soup, using a high-quality beef broth will make a big difference in the overall flavor.
  • Toast the Bread: Toasting the bread before adding it to the soup helps it hold up better under the cheese and prevents it from becoming too soggy.
  • Choose the Right Cheese: Gruyère cheese is traditionally used for French onion soup because of its excellent melting qualities and nutty flavor. However, you can also use Swiss or a mix of cheeses if you prefer.
  • Broil Carefully: When broiling the cheese-topped soup, keep a close eye on it. Cheese can go from perfectly melted to burnt very quickly, so don’t step away from the oven.