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–+ servings
French Onion Soup

Hearty French Onion Soup for Cozy Nights In

Delve into the warmth of this French Onion Soup, a classic comfort food brimming with flavor and topped with cheese.
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Prep Time 10 minutes
Cook Time 1 hour 30 minutes
Total Time 1 hour 40 minutes
Servings: 4 bowls
Course: Dinner
Cuisine: French
Calories: 380
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Soup
  • 4 cups thinly sliced yellow onions
  • 2 tablespoons unsalted butter Can use salted butter but adjust salt
  • 1 tablespoon olive oil Any neutral oil can be used
  • 1 teaspoon kosher salt
  • 1 pinch sugar Optional
  • 6 cups beef broth Substitute with vegetable broth for a vegetarian version
  • 1/2 cup dry white wine Splash of apple cider vinegar can suffice
  • 1 teaspoon fresh thyme Dried thyme may be used with adjustment
  • to taste freshly cracked black pepper
  • 2 tablespoons all-purpose flour Gluten-free flour can be used
For the Topping
  • 1 loaf French bread Ciabatta can work well
  • 1 cup shredded Gruyère cheese Swiss or mozzarella can substitute
  • 1/2 cup shredded Parmesan cheese Pecorino Romano can be used for a sharper taste

Equipment

  • Large pot
  • Oven
  • Baking Sheet

Method
 

Step-by-Step Instructions
  1. In a large pot, melt 2 tablespoons of unsalted butter and 1 tablespoon of olive oil over medium heat. Allow the butter to foam and bubble.
  2. Once melted, add 4 cups of thinly sliced yellow onions, stirring to coat. Sauté for about 40-45 minutes, until they become deep golden brown.
  3. Sprinkle 1 teaspoon of kosher salt and a pinch of sugar over the onions, stirring well for another 5 minutes to deepen flavors.
  4. Stir in 2 tablespoons of all-purpose flour, cooking for 2-3 minutes to thicken the soup.
  5. Pour in 1/2 cup of dry white wine and scrape up brown bits from the bottom. Allow to simmer for 3-5 minutes.
  6. Add 6 cups of beef broth, 1 teaspoon of fresh thyme, 2 bay leaves, and freshly cracked black pepper to taste. Bring to a gentle simmer for about 30 minutes.
  7. Preheat your oven to 350°F (175°C). Slice French bread and toast in the oven for about 10 minutes.
  8. Ladle soup into oven-safe bowls, placing toasted bread on top. Sprinkle with a mix of shredded Gruyère and Parmesan cheese.
  9. Broil for 2-4 minutes until cheese is bubbling and golden brown.
  10. Serve hot, ensuring every bowl has a crispy, cheesy topping.

Nutrition

Serving: 1bowlCalories: 380kcalCarbohydrates: 45gProtein: 12gFat: 18gSaturated Fat: 10gPolyunsaturated Fat: 1gMonounsaturated Fat: 6gCholesterol: 50mgSodium: 900mgPotassium: 500mgFiber: 3gSugar: 5gVitamin A: 500IUVitamin C: 8mgCalcium: 450mgIron: 2mg

Notes

Slow caramelization is key for the best flavor. Toast bread properly before adding to the soup and watch the broiler closely to avoid burning.

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