Backed Onion Soup Recipe

Baked Onion Soup Recipe is made with butter, onions, garlic, beef broth, white wine (or water), Worcestershire sauce, Swiss cheese, French bread, and Parmesan cheese. This comforting and hearty recipe creates a traditional Baked Onion Soup that takes about 50 minutes to prepare and can serve up to 6 people.

Backed Onion Soup Ingredients

• 1/4 cup (4 tablespoons) unsalted butter
• 3 large yellow or sweet onions, thinly sliced (about 2 pounds)
• 2 cloves garlic, minced
• 2 cans (10-1/2 oz. each) beef broth
• 1 cup dry white wine or water
• 1 teaspoon Worcestershire sauce
• 6 slices Swiss cheese, cut diagonally in half to form triangles
• 6 slices French bread, about 3/4-inch thick, toasted
• 1/2 cup (2 oz.) shredded Parmesan cheese

Backed Onion Soup Instructions

1. In a large saucepan, melt the butter over medium heat. Add the thinly sliced onions and minced garlic, cooking for about 30 minutes or until the onions are very tender, stirring occasionally.
2. Stir in the beef broth, white wine (or water), and Worcestershire sauce. Increase the heat and bring the mixture to a boil, then reduce the heat and let it simmer for 10 minutes.
3. Preheat the broiler. Ladle the soup into six ovenproof bowls. Place one triangle of Swiss cheese over each portion of soup, followed by one slice of toasted French bread. Add another triangle of Swiss cheese over the bread and sprinkle with Parmesan cheese.
4. Place the filled bowls under the preheated broiler, positioning them about 5 inches from the heat source. Broil for about 2 minutes or until the cheese is melted and golden brown.
5. Carefully remove the bowls from the broiler, allowing them to cool slightly before serving.

Recipe Tips

• Caramelizing Onions: For richer flavor, consider caramelizing the onions slowly over low heat until they turn golden brown. This process can take longer but adds a depth of flavor to the soup.
• Choosing Cheese: Experiment with different types of cheese for topping the soup. Gruyere or Gouda can be delicious alternatives to Swiss cheese, adding unique flavors to the dish.
• Broiling Technique: When broiling the soup bowls, keep a close eye on them to prevent burning. For a crispier texture, broil the cheese until it forms a golden crust without burning.

How To Store Backed Onion Soup

Refrigerate: Allow the Baked Onion Soup to cool completely. Then, ladle it into an airtight container or cover the soup bowls tightly with plastic wrap. It can be stored in the refrigerator for up to 3-4 days.

Freeze: To prolong storage, freeze the soup. Ensure it’s completely cooled before transferring. Ladle the soup into freezer-safe containers, leaving some space for expansion, or use freezer bags. The soup can be frozen for up to 2 months. When ready to enjoy, thaw it overnight in the refrigerator before reheating on the stove or in the microwave.

How To Reheat Leftover Backed Onion Soup

In The Oven: Preheat the oven to 350°F (175°C). Transfer the leftover soup into an oven-safe dish and cover it with aluminum foil to prevent drying. Reheat for about 15-20 minutes, or until it is heated through.

In The Microwave: Place a serving of the soup in a microwave-safe dish and cover it loosely with a microwave-safe cover or microwave-safe plastic wrap. Heat on high for 2-3 minutes, stirring halfway through to ensure even heating.

In The Air Fryer: Preheat the air fryer to 350°F (175°C). Transfer the soup into an air fryer-safe container. Heat for 5-10 minutes, checking halfway to prevent overheating or drying out.

What To Serve Backed Onion Soup

Baked Onion Soup Recipe pairs well with crusty bread, green salad, roasted vegetables, and garlic bread. It also can be served alongside a cheese platter, grilled cheese sandwiches, croutons, and a light soup for better savoring of the meal.

Frequently Asked Questions

Can I use different types of onions?

Yes, you can use different types of onions based on your preference. Yellow or sweet onions work well for this recipe, but you can experiment with red onions or shallots for a different flavor profile.

Can I substitute the wine with something else?

Absolutely! If you prefer not to use wine, you can substitute it with an equal amount of water or vegetable broth for a different flavor. Alternatively, you can use apple cider vinegar or balsamic vinegar for added depth.

How can I make this recipe vegetarian?

To make this recipe vegetarian, simply replace the beef broth with vegetable broth. You can also enhance the flavor by adding a tablespoon of soy sauce or miso paste to mimic the umami richness of beef broth.

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• Bean Sprout Soup Recipe
• Banana Pepper Soup Recipe
• Bean and Bacon Soup Recipes