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5 from 9 votes

French Onion Soup with Challah Croutons

A twist on the classic French onion soup, topped with cubes of sweet challah bread and fresh thyme and still full of incredibly caramelized sweet onions.
Prep Time15 minutes
Cook Time50 minutes
Total Time1 hour 5 minutes
Course: Appetizer, Dinner, Main Course, Soup
Cuisine: French
Keyword: French onion soup with croutons
Servings: 8 servings
Calories: 260kcal
Cost: $15

Equipment

Ingredients

  • 3 tablespoons Olive oil
  • 3 tablespoons unsalted butter unsalted
  • 4-5 yellow onions sliced thinly
  • ¼ teaspoon sugar
  • 3 tablespoons all purpose flour
  • 3-4 sprigs of fresh thyme leaves removed and chopped
  • ½ cup white wine
  • 8 cups beef stock low sodium preferred

Challah Croutons

  • 1 challah bread cut into cubes
  • Olive oil for drizzling

Toppings

  • 1 cup shredded Gruyere
  • Fresh thyme leaves

Instructions

  • In a large and wide pot, melt butter and oil together and add all of your onions.
  • Cover pot and cook onions on medium heat for 15-20 minutes until they begin to break down and caramelize.
  • Then take the cover off and add sugar and salt. Stir in and continue to cook the onions, stirring them every few minutes until the onions continue to break down and caramelize.
  • Once onions are a deep brown color, add flour and fresh thyme and stir it in. The onions will get thicker.
  • Add the white wine and allow to cook until wine reduces, about 2-3 minutes and then add your beef stock and mix well. Allow to cook on a gentle simmer for an additional 20 minutes. Season with salt and pepper and adjust seasoning as needed.
  • When ready, ladle soup into oven safe soup pots and top with toasted bread and shredded cheese.
  • Place soup bowls on a baking sheet and bake in 400 degree Fahrenheit oven for about 10 minutes or until the cheese melts.

Challah Croutons

  • Add cubed challah to a parchment lined baking sheet and drizzle with olive oil.
  • Bake croutons at 350 degrees Fahrenheit for 5-10 minutes until just toasted. The reserve to top soup.

Notes

You can also place the soup under a broiler for 3-4 minutes to melt the cheese. 
If making the soup ahead of time, add the croutons right before serving so they don't get too soggy. 

Nutrition

Calories: 260kcal | Carbohydrates: 18g | Protein: 11g | Fat: 15g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 7g | Trans Fat: 0.2g | Cholesterol: 30mg | Sodium: 608mg | Potassium: 672mg | Fiber: 2g | Sugar: 10g | Vitamin A: 307IU | Vitamin C: 9mg | Calcium: 224mg | Iron: 1mg