Parisian Onion Soup

Prep: 15 min Cook: 30 min Serves: 6 Cuisine: French

A comforting French onion soup featuring caramelized onions, rich broth, toasted bread, and melted cheese. Perfect for cozy evenings, it combines sweet onions with savory broth and gooey cheese, making it a hearty starter or main course for onion lovers and those seeking classic French flavors.

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Ingredients

  • 6 large white onions
  • 1/2 cup water
  • 6 teaspoons chicken bouillon, dissolved
  • 1/2 teaspoon salt
  • 1/8 teaspoon pepper
  • 6 slices French bread or toast
  • seasoned croutons
  • sliced Swiss or Mozzarella cheese
  • 1/4 cup Parmesan cheese

Instructions

  1. Simmer thinly sliced onions in water until tender.
  2. Dissolve chicken bouillon in the water.
  3. Add the dissolved bouillon to the onions and simmer a few minutes.
  4. Place a few croutons and a slice of French bread or toast in each bowl.
  5. Add a slice of Swiss or Mozzarella cheese on top of the bread.
  6. Pour the hot soup over the cheese and bread in each bowl.
  7. Sprinkle with Parmesan cheese and let stand for a minute or two to melt the cheese.

Tips & Substitutions

For added flavor, try sautéing the onions in a bit of butter before simmering them in water. If you prefer a vegetarian version, substitute the chicken bouillon with vegetable bouillon. You can also use Gruyère cheese instead of Swiss or Mozzarella for a more traditional taste. This soup pairs beautifully with Noodle Soup for a comforting meal.

Serving Suggestions

Serve the soup hot, garnished with additional Parmesan cheese and fresh herbs like thyme or parsley for a pop of color. It pairs wonderfully with a simple green salad or a side of crusty baguette. For a heartier meal, consider serving it alongside Chicken In Tomato And Onion Sauce.

Storage & Reheating

Store leftover soup in an airtight container in the refrigerator for up to 3 days. To reheat, warm the soup gently on the stove or in the microwave until hot, ensuring not to boil it to preserve the texture of the cheese. You can also freeze the soup, but it's best to add the cheese when serving.

Nutrition & Diet Analysis (per serving)

Each serving of Parisian Onion Soup contains roughly 80 calories, with 2g protein, 12g carbohydrates, and 3g fat. Note that it is relatively high in sodium, at 1946mg per serving (85% of the Daily Value).

80 kcal 4% DV
Protein Fat Carbs

Macronutrients

Protein 1.8g 4% DV
Total Fat 2.8g 4% DV
Carbs 12.1g 4% DV
Fiber 0.4g 1% DV
Sugar 0.6g 1% DV

Electrolytes

Sodium 1946.2mg 85% DV
Potassium 50.9mg 1% DV
Cholesterol 9.8mg 3% DV

Vitamins & Minerals

Vitamin A 24.5mcg 3% DV
Vitamin C 4.5mg 5% DV
Calcium 22.3mg 2% DV
Iron 0.4mg 2% DV
Diet fit Low-carb Under 400 cal
Contains Milk Wheat/Gluten

Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.

* % Daily Values based on a 2,000 calorie diet (FDA 2020).

Frequently Asked Questions

Can I use different types of cheese?

Yes, you can absolutely experiment with different cheeses. Gruyère is a classic choice for French onion soup, but you can also use a sharp cheddar or a creamy fontina for a unique twist. Just remember that the cheese should melt well to achieve that perfect gooey topping.

How can I make this soup thicker?

If you prefer a richer flavor, adding a splash of dry white wine during the onion cooking process can enhance the depth of the soup. Just ensure to let the alcohol cook off before adding the broth.

Can I make this soup ahead of time?

Absolutely! French onion soup can be made a day in advance. Simply prepare the soup and store it in the refrigerator. When ready to serve, reheat the soup on the stove, then assemble with bread and cheese just before serving for that freshly melted topping.

Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).

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