Swiss Fondue Style Onion Soup

Transport your taste buds straight to the Alps with this luxurious Swiss Fondue Style Onion Soup, a comforting twist on the classic French onion soup. Caramelized yellow onions are simmered to perfection in a flavorful blend of dry white wine, rich beef or vegetable stock, and aromatic herbs like fresh thyme and bay leaf. The real star of this dish, however, is the Gruyère cheese-laden crusty French baguette that’s toasted, rubbed with garlic, and broiled to golden perfection atop each serving, creating a molten, fondue-inspired crown. Perfect for cozy evenings or elegant dinner parties, this recipe combines the nutty decadence of Swiss fondue with the soulful warmth of onion soup. Ready in just over 90 minutes, it serves as a show-stopping appetizer or a satisfying main dish for cheese lovers.

Nutriscore Rating: 63/100

Prep Time:15 mins

Cook Time:75 mins

Total Time:90 mins

Servings: 6

Ingredients

• 4 tablespoons Unsalted butter
• 2 tablespoons Olive oil
• 6 medium-sized (thinly sliced) Yellow onions
• 1 teaspoon Sugar
• 2 tablespoons All-purpose flour
• 1.5 cups Dry white wine
• 6 cups Beef or vegetable stock
• 4 sprigs Fresh thyme
• 1 piece Bay leaf
• 1 teaspoon (to taste) Salt
• 0.5 teaspoons (to taste) Black pepper
• 1 small loaf (sliced) Crusty French baguette
• 2 cups (shredded) Gruyère cheese
• 1 piece (halved) Garlic clove

Directions

Step 1

In a large, heavy-bottomed pot, melt the butter with the olive oil over medium heat.

Step 2

Add the sliced onions and sprinkle with the sugar. Stir to coat the onions evenly.

Step 3

Cook the onions on medium-low heat, stirring frequently, until deeply caramelized and golden brown. This process will take about 30-40 minutes.

Step 4

Sprinkle the flour over the caramelized onions and stir well to combine. Cook for 2 minutes to eliminate the raw flour taste.

Step 5

Add the white wine and scrape the bottom of the pot with a wooden spoon to deglaze. Simmer the wine until slightly reduced, about 5 minutes.

Step 6

Pour in the stock, and add the thyme sprigs and bay leaf. Bring the soup to a gentle simmer and cook for 20-25 minutes, uncovered.

Step 7

While the soup simmers, prepare the toasts. Rub the sliced baguette pieces with the cut side of the garlic clove.

Step 8

Toast the bread slices under the broiler until lightly golden on both sides, about 1-2 minutes per side. Set aside.

Step 9

Preheat the broiler to high. Ladle the soup into oven-safe bowls or crocks and place them on a baking sheet.

Step 10

Place a toasted baguette slice on top of each bowl of soup and cover generously with shredded Gruyère cheese.

Step 11

Place the bowls under the broiler until the cheese is bubbling and golden brown, about 3-5 minutes.

Step 12

Carefully remove from the oven, garnish with freshly cracked black pepper or additional thyme if desired, and serve hot.

Nutrition Facts

Serving size	(2960.3g)

Amount per serving	% Daily Value*
Calories	2810.7

Total Fat 165.8g	0%
Saturated Fat 83.9g	0%
Polyunsaturated Fat 7.2g
Cholesterol 414.4mg	0%
Sodium 10144.7mg	0%
Total Carbohydrate 168.5g	0%
Dietary Fiber 16.1g	0%
Total Sugars 41.6g
Protein 108.7g	0%

Vitamin D 63.4IU	0%
Calcium 2952.0mg	0%
Iron 6.8mg	0%
Potassium 1944.2mg	0%

*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: 57.4%

Protein: 16.7%

Carbs: 25.9%