Hearty French Onion Soup

Warm up your soul with this Hearty French Onion Soup, a comforting classic that layers deeply caramelized onions, savory beef stock, and fragrant herbs for an unforgettable bowl of goodness. Perfect for chilly evenings, this recipe features a golden Gruyère cheese topping melted over crisp, oven-toasted baguette slices for the ultimate indulgence. With just a touch of dry white wine to deglaze and enhance the flavors, every spoonful delivers a rich, velvety texture and a perfect balance of sweet and savory notes. Ready in under two hours, this French Onion Soup is a crowd-pleasing favorite that can be served as a starter or enjoyed as a fulfilling main dish. It's the perfect way to elevate your weeknight meal or impress at your next dinner party!

Nutriscore Rating: 69/100

Prep Time:15 mins

Cook Time:75 mins

Total Time:90 mins

Servings: 6

Ingredients

• 3 tablespoons unsalted butter
• 1 tablespoon olive oil
• 6 large yellow onions
• 1 teaspoon kosher salt
• 0.5 teaspoons granulated sugar
• 2 tablespoons all-purpose flour
• 0.5 cups dry white wine
• 8 cups low-sodium beef stock
• 2 sprigs fresh thyme sprigs
• 1 whole bay leaf
• 1 loaf baguette
• 2 cups Gruyère cheese
• 0.5 teaspoons black pepper

Directions

Step 1

Peel and slice the yellow onions into thin, even slices.

Step 2

In a large heavy-bottomed pot or Dutch oven, heat the butter and olive oil over medium heat until melted.

Step 3

Add the sliced onions, kosher salt, and granulated sugar to the pot. Stir to coat the onions evenly.

Step 4

Cook the onions over medium heat, stirring occasionally, for about 40-50 minutes until deeply caramelized. Reduce the heat to medium-low if they start to brown too quickly.

Step 5

Sprinkle the flour over the onions and stir well to combine. Cook for 2-3 minutes to remove the raw flour taste.

Step 6

Deglaze the pot by pouring in the dry white wine. Scrape up any browned bits from the bottom of the pot with a wooden spoon.

Step 7

Add the beef stock, fresh thyme sprigs, and bay leaf to the pot. Stir to combine.

Step 8

Bring the soup to a gentle simmer and cook for 20-25 minutes, stirring occasionally. Season with black pepper to taste.

Step 9

While the soup is simmering, preheat the oven to 400°F (200°C). Slice the baguette into 1/2-inch thick slices and place them on a baking sheet.

Step 10

Toast the baguette slices in the oven for 5-7 minutes until crisp and lightly golden.

Step 11

Grate the Gruyère cheese and set aside.

Step 12

Ladle the soup into oven-safe bowls. Top each bowl with a toasted baguette slice and a generous handful of Gruyère cheese.

Step 13

Place the bowls on a baking sheet and broil in the oven until the cheese is melted and bubbly, about 2-3 minutes.

Step 14

Garnish with additional thyme if desired and serve hot.

Nutrition Facts

Serving size	3604.6 grams (3604.6g)

Amount per serving	% Daily Value*
Calories	3049

Total Fat 148.20g	190%
Saturated Fat 75.20g	376%
Polyunsaturated Fat 5.90g
Cholesterol 383mg	128%
Sodium 5591mg	243%
Total Carbohydrate 280.30g	102%
Dietary Fiber 23.80g	85%
Total Sugars 57.60g
Protein 141.60g	283%

Vitamin D 63IU	317%
Calcium 3137mg	241%
Iron 17mg	96%
Potassium 2447mg	52%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 44.1%

Protein: 18.7%

Carbs: 37.1%