French Onion Soup Recipe

User Reviews

4.7

81 reviews
Excellent
  • Prep Time

    15 mins

  • Cook Time

    4 hrs 15 mins

  • Total Time

    4 hrs 45 mins

  • Servings

    6 servings

  • Calories

    394 kcal

  • Course

    Soup

  • Cuisine

    French

French Onion Soup Recipe

Bubbling gruyere cheese and crispy baguette top a brothy base full of perfectly braised onions in this showstopping French onion soup recipe. Whether you're making it to warm up on a cold day or for a delicious date night in, this feels luxurious and cozy each and every time. 

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Ingredients

Servings

Soup:

  • 3 tablespoons unsalted butter cut into 3 pieces
  • 6 large yellow onions about 4 pounds, halved and cut into ¼-inch thick slices
  • table salt
  • 2 cups water plus extra for deglazing
  • ½ cup dry sherry
  • 4 cups chicken broth
  • 2 cups beef broth
  • 6 sprigs fresh thyme tied with kitchen twine
  • 1 bay leaf
  • ground black pepper

Cheese Croutons:

  • 1 small baguette cut into ½-inch slices
  • 8 ounces shredded gruyere cheese about 2½ cups
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Instructions

  1. Braise/Caramelize Onions: Adjust oven rack to lower-middle position and heat oven to 400 degrees F. Generously spray inside of heavy-bottomed large (at least 7-quart) Dutch oven with nonstick cooking spray. Place butter in the pot and add onions and 1 teaspoon salt. Cook, covered, 1 hour (onions will be moist and slightly reduced in volume). Remove pot from oven and stir onions, scraping bottom and sides of pot. Return pot to oven with lid slightly ajar and continue to cook until onions are very soft and golden brown, 1½ to 1¾ hours longer, stirring onions and scraping bottom and sides of pot after 1 hour.
  2. Carefully remove pot from oven and place over medium-high heat. Using oven mitts to handle pot, cook onions, stirring frequently and scraping bottom and sides of pot, until liquid evaporates and onions brown, 15 to 20 minutes, reducing heat to medium if onions are browning too quickly. Continue to cook, stirring frequently, until pot bottom is coated with dark crust, 6 to 8 minutes, adjusting heat if necessary. (Scrape any crust that collected on spoon back into onions.) Stir in ¼ cup water, scraping pot bottom to loosen crust, and cook until water evaporates and pot bottom has formed another dark crust, 6 to 8 minutes. Repeat process of deglazing 2 or 3 more times, until onions are very dark brown. Stir in sherry and cook, stirring frequently, until sherry evaporates, about 5 minutes.
  3. Finish the Soup: Stir in broths, 2 cups water, thyme, bay leaf, and ½ teaspoon salt, scraping up any final bits of browned crust on bottom and sides of pot. Increase heat to high and bring to simmer. Reduce heat to low, cover, and simmer 30 minutes. Remove and discard herbs, then season with salt and pepper.
  4. Broil with Cheesy Baguette Slices: While soup simmers, arrange baguette slices in single layer on baking sheet and bake in 400-degree oven until bread is dry, crisp, and golden at edges, about 10 minutes. Set aside.
  5. Adjust oven rack 6 inches from broiler element and heat broiler. Set individual broiler-safe crocks on baking sheet and fill each with about 1¾ cups soup. Top each bowl with 1 or 2 baguette slices (do not overlap slices) and sprinkle evenly with Gruyere. Broil until cheese is melted and bubbly around edges, 3 to 5 minutes. Let cool 5 minutes before serving.

Notes

  • Equipment: 7-quart Dutch oven / Broiler-safe soup crocks
  • Onions: Use yellow onions for the best balance of flavor.
  • Broth: This recipe calls for a combination of beef and chicken broth; you can adjust the ratios based on what you have on hand and substitute stock if you'd like.
  • Baguette: Sliced French baguette is the traditional topping for French onion soup, but any crusty bread will suffice, and if you're in a pinch, you can use big croutons, too!
  • Cheese: Gruyere is the standard, but shredded Swiss makes a great substitute.
  • Broiling: If using ordinary soup bowls, sprinkle the toasted bread slices with Gruyère and return them to the broiler until the cheese melts, then float them on top of the soup. 
  • Make-Ahead: For the best flavor, make the soup a day or 2 in advance. Alternatively, the onions can be prepared through step 1, cooled in the pot, and refrigerated for up to 3 days before proceeding with the recipe.
  • Storage: Leftover soup can be refrigerated for up to 4 days.
  • Freezing: The soup can be frozen in an airtight container for up to 3 months. Do not freeze the cheese-covered bread with the soup; freeze the soup separately and add the bread and cheese before serving.
  • Recipe adapted from Cook's Illustrated

Nutrition Information

Show Details
Calories 394kcal (20%) Carbohydrates 32g (11%) Protein 17g (34%) Fat 19g (29%) Saturated Fat 11g (55%) Cholesterol 56mg (19%) Sodium 602mg (25%) Potassium 425mg (12%) Fiber 3g (12%) Sugar 5g (10%) Vitamin A 580IU (12%) Vitamin C 20.7mg (23%) Calcium 464mg (46%) Iron 2.2mg (12%)

Nutrition Facts

Serving: 6servings

Amount Per Serving

Calories 394 kcal

% Daily Value*

Calories 394kcal 20%
Carbohydrates 32g 11%
Protein 17g 34%
Fat 19g 29%
Saturated Fat 11g 55%
Cholesterol 56mg 19%
Sodium 602mg 25%
Potassium 425mg 9%
Fiber 3g 12%
Sugar 5g 10%
Vitamin A 580IU 12%
Vitamin C 20.7mg 23%
Calcium 464mg 46%
Iron 2.2mg 12%

* Percent Daily Values are based on a 2,000 calorie diet.

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4.7

81 reviews
Excellent

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