Pin it A classic French bistro soup featuring caramelized onions in a rich broth, topped with gooey melted cheese—simple, budget-friendly, and deeply satisfying.
I first served this to my family on a chilly evening and it quickly became a household favorite.
Ingredients
- Yellow onions: 1.2 kg, thinly sliced
- Gruyère cheese: 150 g, grated
- Unsalted butter: 2 tbsp
- Broth: 1.2 L good-quality beef or vegetable broth
Instructions
- Step 1:
- Melt the butter in a large heavy-bottomed pot over medium-low heat. Add the sliced onions and a pinch of salt.
- Step 2:
- Cook the onions slowly, stirring occasionally, until deeply caramelized and golden brown, about 30 35 minutes.
- Step 3:
- Increase heat to medium. Pour in the broth, scraping up any browned bits from the bottom. Simmer uncovered for 10 minutes. Taste and adjust seasoning if needed.
- Step 4:
- Preheat your oven broiler. Ladle soup into oven-safe bowls. Top each serving with a generous handful of Gruyère.
- Step 5:
- Place bowls under the broiler for 2 3 minutes, or until the cheese is melted and bubbling.
- Step 6:
- Serve hot, optionally with sliced baguette.
Pin it This recipe always brings my family together for a cozy meal and warm conversation.
Notes
Swap Gruyère for Emmental or Comté if preferred.
Required Tools
Large heavy-bottomed pot, wooden spoon, oven-safe soup bowls, cheese grater
Allergen Information
Contains dairy (butter, cheese). Contains potential gluten if served with bread. Use gluten-free bread for a gluten-free version. Always check broth and cheese labels for allergens.
Pin it This effortless French onion soup is perfect for any occasion and sure to impress.
Recipe FAQs
- → What type of onions work best?
Yellow onions are ideal for their natural sweetness and ability to caramelize well, providing depth to the dish.
- → Can I use vegetable broth instead of beef broth?
Yes, vegetable broth creates a vegetarian-friendly version while still offering a rich, savory flavor.
- → What cheese is recommended for topping?
Gruyère is preferred for its excellent melting qualities and nutty taste, but Emmental or Comté can be used as alternatives.
- → How long should the onions be caramelized?
Slowly cook the onions for about 30 to 35 minutes over medium-low heat until deeply golden and sweet.
- → Is it necessary to broil the soup?
Broiling melts and bubbles the cheese topping, adding a delightful texture and flavor contrast to the dish.