French Onion Tomato Soup

Indulge in the comforting fusion of classic French onion soup and hearty tomato soup with this French Onion Tomato Soup recipe. Slow-caramelized onions bring a deep, rich sweetness that pairs beautifully with the vibrant tang of crushed tomatoes and tomato paste, all simmered in a thyme-scented vegetable broth for a harmonious blend of flavors. Topped with golden, oven-toasted baguette slices smothered in melty Gruyère or Swiss cheese, this dish is both rustic and luxurious. Perfect as a cozy appetizer or a light dinner, it’s a savory delight that comes together with simple ingredients but delivers gourmet-level satisfaction. Whether you’re craving a warming bowl during chilly weather or looking to elevate your soup game, this recipe is sure to please.

Nutriscore Rating: 76/100

Prep Time:15 mins

Cook Time:60 mins

Total Time:75 mins

Servings: 4

Ingredients

• 3 tablespoons unsalted butter
• 2 tablespoons olive oil
• 4 large yellow onions, thinly sliced
• 1 teaspoon granulated sugar
• 3 cloves garlic cloves, minced
• 28 ounces canned crushed tomatoes
• 2 tablespoons tomato paste
• 4 cups vegetable broth
• 1 teaspoon dried thyme
• 1 leaf bay leaf
• 1.5 teaspoons salt
• 0.5 teaspoons black pepper
• 6 slices baguette slices, about 1-inch thick
• 1 cup grated Gruyère or Swiss cheese

Directions

Step 1

Melt the butter and olive oil together in a large pot over medium heat.

Step 2

Add the thinly sliced onions and cook, stirring often, for 25-30 minutes until they are deeply caramelized. Reduce the heat if necessary to prevent burning.

Step 3

Stir in the sugar and garlic and cook for an additional 2 minutes until fragrant.

Step 4

Add the crushed tomatoes, tomato paste, vegetable broth, thyme, bay leaf, salt, and black pepper. Stir to combine.

Step 5

Bring the soup to a gentle simmer and let it cook uncovered for 30 minutes, stirring occasionally.

Step 6

While the soup simmers, preheat your oven to 400°F (200°C).

Step 7

Place the baguette slices on a baking sheet and toast them in the preheated oven for 5 minutes, flipping halfway through, until lightly golden.

Step 8

Sprinkle the grated Gruyère cheese evenly over the toasted bread slices and return them to the oven. Bake for another 5 minutes, or until the cheese is melted and bubbly.

Step 9

Remove the bay leaf from the soup and adjust seasoning with additional salt and pepper, if needed.

Step 10

Ladle the soup into bowls and top each serving with a cheesy crouton. Serve immediately.

Nutrition Facts

Serving size	2749.4 grams (2749.4g)

Amount per serving	% Daily Value*
Calories	2336

Total Fat 116.70g	150%
Saturated Fat 48.40g	242%
Polyunsaturated Fat 5.50g
Cholesterol 213mg	71%
Sodium 7962mg	346%
Total Carbohydrate 267.10g	97%
Dietary Fiber 43.20g	154%
Total Sugars 87.10g
Protein 85.70g	171%

Vitamin D 24IU	120%
Calcium 1474mg	113%
Iron 18mg	99%
Potassium 5876mg	125%

*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: 42.7%

Protein: 13.9%

Carbs: 43.4%