Rich Onion Soup

User Reviews

5

141 reviews
Excellent
  • Prep Time

    10 mins

  • Cook Time

    50 mins

  • Total Time

    1 hr

  • Servings

    4 servings

  • Calories

    175 kcal

  • Course

    Soup

  • Cuisine

    French

Rich Onion Soup

Rich Onion Soup is made by slowly caramelizing thinly sliced onions in butter, then thickening with a flour roux and deglazing with white wine. Beef broth, black pepper, and thyme add depth and earthiness. The soup simmers until thickened, delivering a savory and comforting flavor with a silky texture.

Description

This Rich Onion Soup starts by cooking onions over medium heat with butter and a pinch of salt, stirring patiently until they achieve a deep caramel color. A splash of water may be added to prevent drying. Flour is then stirred in to form a roux that helps thicken the soup and remove raw flour taste. White wine is added and reduced to concentrate flavor before pouring in beef broth and seasonings.

Simmering uncovered for about 20 minutes allows the soup to thicken and the flavors to meld. The finished soup is deeply savory with sweet undertones from the caramelized onions and an aromatic blend of thyme and black pepper. It can be served as a starter or a warming main course alongside bread.

Leftovers keep well refrigerated for several days and reheat gently to preserve texture. The recipe notes recommend using yellow or white onions and caution against higher heat caramelization to avoid bitterness. Reduced sodium broth may require additional salt adjustments.

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Ingredients

Servings
  • 2 tablespoons butter unsalted
  • 4 onion 6 ounces each, sliced into thin rounds, medium
  • Pinch salt
  • 2 tablespoons all-purpose flour
  • ½ cup white wine dry
  • 1 quart beef broth not low-sodium; see notes below
  • teaspoon black pepper
  • ¼ teaspoon thyme dried

Instructions

  1. Heat the butter in a large saucepan over medium heat. Add the onions with a pinch of salt and patiently cook, stirring often, until caramelized, 15-20 minutes. If the pan becomes too dry during cooking, add a splash of water (1-2 tablespoons).
  2. Add the flour and mix with a wooden spoon for about 1 minute until it starts to brown.
  3. Add the wine. Mix well. Cook for about 2 minutes until most of the wine evaporates.
  4. Add the beef broth, black pepper, and dried thyme. Bring to a boil over high heat.
  5. Reduce the heat to medium-low and simmer, uncovered, stirring often, until the soup is noticeably thicker, about 20 minutes. Serve immediately.

Notes

  • Use yellow or white onions for the best flavor; avoid red onions for this soup.
  • Cook onions slowly over medium heat to develop deep caramelization without burning.
  • Add 1-2 tablespoons of water during caramelization if the pan becomes too dry to prevent sticking.
  • Omitting the wine is acceptable; increase broth quantity by half a cup if skipping wine.
  • If using reduced-sodium broth, taste and adjust salt accordingly before serving.
  • Store leftovers refrigerated in a sealed container for 3-4 days and reheat gently at medium-low power.
  • For freezing, portion soup into sealed containers or mugs and thaw covered before reheating.

Nutrition Information

Show Details
Serving 0.25recipe Calories 175kcal (9%) Carbohydrates 19g (6%) Protein 5g (10%) Fat 7g (11%) Saturated Fat 3g (15%) Sodium 616mg (26%) Fiber 3g (12%) Sugar 8g (16%)

Nutrition Facts

Serving: 4servings

Amount Per Serving

Calories 175 kcal

% Daily Value*

Serving 0.25recipe
Calories 175kcal 9%
Carbohydrates 19g 6%
Protein 5g 10%
Fat 7g 11%
Saturated Fat 3g 15%
Sodium 616mg 26%
Fiber 3g 12%
Sugar 8g 16%

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

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Overall Rating

5

141 reviews
Excellent

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