French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping is a warm, savory bowl that fills the kitchen with rich aroma.

introduction — French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

This French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping mixes sweet caramelized onions and earthy mushrooms for deep flavor.
It uses extra herbs for warmth and croissant pieces with melted cheese on top for a soft, gooey finish.
Try it when you want a simple, special meal that is easy to make and full of taste.
You can pair it with a grilled cheese twist like the one found here: grilled cheese twist.

why make this recipe — French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

You should make this French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping because it is cozy and uses basic ingredients.
The extra herbs lift the soup and mushrooms add texture and heartiness.
It is a great dish for a simple dinner or when guests come over, and it pairs well with light sides like a mild stew such as a cod and potato stew.

how to make French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

Follow these steps to make the soup. The slow caramelizing of onions builds a deep, sweet base that makes this soup special.

Ingredients :

• 4 large onions, thinly sliced
• 2 cups mushrooms, sliced
• 4 cups beef or vegetable broth
• 2 tablespoons olive oil
• 2 tablespoons butter
• 1 teaspoon thyme
• 1 teaspoon rosemary
• Salt and pepper to taste
• 1 cup shredded cheese (Gruyère or Swiss)
• 2-3 croissants, cut into pieces
• 1 bay leaf

Directions :

1. In a large pot, heat olive oil and butter over medium heat. Add sliced onions and cook, stirring occasionally, until caramelized. This may take about 20-30 minutes.
2. Add the sliced mushrooms and continue to sauté until they are soft.
3. Pour in the broth and add the thyme, rosemary, bay leaf, salt, and pepper. Bring to a simmer and let it cook for another 15 minutes.
4. Preheat the oven to 375°F (190°C).
5. Remove the bay leaf from the soup and ladle the soup into oven-safe bowls.
6. Top each bowl with croissant pieces and sprinkle generously with shredded cheese.
7. Place the bowls on a baking sheet and bake in the oven until the cheese is melted and bubbly, about 10-15 minutes.
8. Serve hot and enjoy!

how to serve French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

Serve French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping hot so the cheese stays melty and the croissant is soft.
Garnish with a little extra thyme or cracked pepper for a nice finish.
Pair it with a simple green salad or a light pasta dish like an easy tortellini soup for a fuller meal.

how to store French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

Cool the soup to room temperature before storing.
Store in an airtight container in the fridge for up to 3–4 days.
If you want to freeze, leave out the croissant pieces and cheese; freeze the soup in a tight container for up to 2 months. Thaw in the fridge and reheat gently on the stove, then add fresh croissant and cheese before baking.

tips to make French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

• Cook the onions low and slow for the best caramel flavor.
• Use a mix of butter and oil so the onions don’t burn.
• Taste and adjust salt and pepper after simmering.
• Add the herbs near the start of simmering to let the flavors blend.
• For a different twist, try adding a splash of wine or balsamic for depth, and see related soup ideas like a curried chicken lentil soup for herb use tips.

variation (if any) — French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

You can make this French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping vegetarian by using vegetable broth.
Swap croissants for toasted baguette slices if you want a firmer bread topping.
Change the cheese to mozzarella or provolone for a milder finish.

FAQs — French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

Q: Can I make French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping vegetarian?
A: Yes. Use vegetable broth instead of beef broth and keep the rest the same.

Q: Can I freeze this French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping?
A: You can freeze the soup base without croissants and cheese for up to 2 months. Thaw in the fridge and reheat before adding fresh croissant and cheese.

Q: What cheese works best for French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping?
A: Gruyère or Swiss give the best melt and flavor. If you need to buy cheese tools or special shredders, Buy it here.

Q: How do I keep the croissant topping from getting too soggy?
A: Cut croissant into chunks and toast lightly before placing on soup. Add cheese and bake only until melted.

Q: Can I add wine to French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping?
A: Yes, add 1/2 cup dry white wine after the mushrooms cook and let it reduce before adding broth.

French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

A warm, savory bowl of French onion soup with caramelized onions, earthy mushrooms, topped with croissant pieces and melted cheese.

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 45 minutes mins

Total Time 55 minutes mins

Course Main Course, Soup

Cuisine French

Servings 4 servings

Calories 380 kcal

Ingredients

  

Vegetables

• 4 large onions, thinly sliced Select sweet onions for best flavor.
• 2 cups mushrooms, sliced Use any type of mushrooms you prefer.

Broth & Seasonings

• 4 cups beef or vegetable broth Use vegetable broth for a vegetarian version.
• 2 tablespoons olive oil
• 2 tablespoons butter
• 1 teaspoon thyme
• 1 teaspoon rosemary
• Salt and pepper to taste

Toppings

• 1 cup shredded cheese (Gruyère or Swiss) For best melt and flavor.
• 2-3 pieces croissants, cut into pieces Toast beforehand for less sogginess.

Instructions

 

Preparation

• In a large pot, heat olive oil and butter over medium heat. Add sliced onions and cook, stirring occasionally, until caramelized for about 20-30 minutes.
• Add the sliced mushrooms and continue to sauté until they are soft.
• Pour in the broth and add thyme, rosemary, bay leaf, salt, and pepper. Bring to a simmer and let it cook for another 15 minutes.

Baking

• Preheat the oven to 375°F (190°C).
• Remove the bay leaf from the soup and ladle the soup into oven-safe bowls.
• Top each bowl with croissant pieces and sprinkle generously with shredded cheese.
• Place the bowls on a baking sheet and bake in the oven until the cheese is melted and bubbly, for about 10-15 minutes.

Serving

• Serve hot and enjoy! Garnish with a little extra thyme or cracked pepper.

Notes

Cook onions low and slow for best flavor. Use a mix of butter and oil to prevent burning. Taste and adjust seasoning after simmering.

Keyword Cheesy Croissant, French Onion Soup, Herbs, Mushrooms