Rustic Cheesy French Onion Soup

Author: Elena

Prep Time: 15 mins | Cook Time: 30 mins | Total Time: 45 mins | Servings: 4

Introduction

There’s something undeniably comforting about a warm bowl of French onion soup. Its rich, savory flavors and gooey cheese topping can transport you to a cozy bistro in Paris, even if you’re just at home on a chilly evening. This Rustic Cheesy French Onion Soup is a labor of love, featuring caramelized onions that create a deep, complex flavor, perfectly complemented by herbed croutons and a generous layer of melted cheese. Join me as we explore how to make this classic dish that’s sure to impress family and friends alike.

Why This Recipe Works

Caramelizing onions enhances their natural sweetness, creating a rich base for the soup.
The combination of beef and chicken broth adds depth and complexity to the flavor.
Herbed croutons provide a delightful crunch that contrasts beautifully with the creamy soup.
Melted Gruyère and mozzarella create a luxurious cheese topping that elevates the dish.

Ingredients

4 large yellow onions, thinly sliced
4 tbsp unsalted butter
1 tbsp olive oil
2 cloves garlic, minced
1 tsp sugar
1 tsp salt
1/2 tsp fresh thyme leaves (or 1/4 tsp dried thyme)
1 bay leaf
1 cup dry white wine (e.g., Sauvignon Blanc)
4 cups low-sodium beef broth
2 cups low-sodium chicken broth
1/4 cup chopped fresh parsley
Freshly cracked black pepper, to taste
4 cups cubed rustic bread (ciabatta or baguette works well)
4 tbsp olive oil (for croutons)
1 tbsp fresh parsley, chopped (for croutons)
1 tsp dried oregano (for croutons)
Salt and pepper, to taste (for croutons)
2 cups shredded Gruyère cheese
1 cup shredded mozzarella cheese
Fresh thyme sprigs (for garnish)

How to Make Rustic Cheesy French Onion Soup

Caramelize the Onions:
- In a large heavy-bottomed pot, melt the butter with the olive oil over medium heat.
- Add the sliced onions, sugar, and salt. Sauté for about 10 minutes until the onions are translucent.
- Lower the heat to medium-low and continue to cook, stirring frequently, for about 30-35 minutes until the onions are golden brown and caramelized.
Add Aromatics:
- Stir in the minced garlic, fresh thyme, and bay leaf. Cook for an additional 1-2 minutes until fragrant.
Deglaze:
- Pour in the white wine and scrape up any browned bits from the bottom of the pot. Let the wine simmer until reduced by half, about 5 minutes.
Add Broths:
- Add the beef broth and chicken broth. Bring to a boil, then reduce the heat and let it simmer for 20-25 minutes. Discard the bay leaf and stir in the chopped parsley. Season with freshly cracked black pepper to taste.
Prepare the Herbed Croutons:
- Preheat your oven to 375°F (190°C).
- In a large bowl, toss the cubed bread with olive oil, fresh parsley, oregano, salt, and pepper.
- Spread the bread cubes on a baking sheet and bake for 15 minutes, or until golden brown and crispy.
Assemble the Soup:
- Preheat your broiler to high.
- Ladle the hot soup into oven-safe bowls or crocks. Top each bowl generously with the herbed croutons and a mix of Gruyère and mozzarella cheeses.
Broil:
- Place the bowls under the broiler for about 3-5 minutes, or until the cheese is bubbling and golden brown.
Garnish and Serve:
- Carefully remove the bowls from the oven (they will be hot!). Garnish each bowl with a sprig of fresh thyme and serve immediately, ensuring it is bubbly and warm.

Expert Tips

For the best flavor, use high-quality broths and fresh herbs.
Caramelizing onions can take time; patience is key for achieving that deep, rich color.
Feel free to mix different types of cheese for a unique flavor profile.

Recipe Variations

Add sautéed mushrooms for an earthy flavor.
Incorporate a splash of balsamic vinegar for added sweetness and depth.
Use gluten-free bread for croutons to make it gluten-free.

Storage, Freezing, Reheating

Store any leftover soup in an airtight container in the refrigerator for up to 3 days. For longer storage, freeze the soup without the croutons for up to 3 months. Reheat on the stovetop or in the microwave until warmed through. Add fresh croutons before serving.

5 FAQs

Can I use yellow onions instead of sweet onions?
Yes, yellow onions work well and provide a great flavor.
Is there a vegetarian version of this soup?
Yes, substitute vegetable broth for beef broth and chicken broth.
Can I prepare this soup in advance?
Yes, you can make the soup ahead of time; just add the croutons and cheese right before serving.
What type of cheese is best for French onion soup?
Gruyère cheese is traditional, but you can mix in mozzarella or provolone for a different taste.
How do I know when the onions are caramelized?
The onions should be a deep golden brown and have a sweet aroma.

Nutrition Facts

Calories: 450 | Protein: 15g | Carbohydrates: 35g | Fat: 25g | Fiber: 2g

Final Thoughts

This Rustic Cheesy French Onion Soup is more than just a meal; it’s an experience that brings warmth and joy to the table. Whether you’re enjoying it on a cold night or serving it at a gathering, this dish is sure to be a hit. Dive into this comforting classic and savor every bite!