Iconic French Onion Soup
Rich, savory, and irresistibly cheesy—this classic French onion soup is easier than you think. Here's everything you need to make it at home.
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Ingredients
- 3 tbsp unsalted butter
- 4 large yellow or pink onions, peeled and thinly sliced
- 2 litres / 8 cups / 2 quarts hot beef stock
- ½ tsp sea salt flakes / kosher salt, or to taste
- ½ tsp ground black pepper, plus more to taste
- 1 cup / 240 ml dry white wine
- 1 tbsp all-purpose flour
- Baguette or French bread
- Grated cheese (ideally Gruyère)
Instructions
- Melt butter in a heavy pot or Dutch oven over medium heat. Add sliced onions and ½ teaspoon salt.
- Cover and cook gently for about 5 minutes to soften.
- Remove the lid and continue cooking, stirring occasionally, until onions turn golden brown and deeply caramelized (30-45 minutes). Adjust heat as needed.
- Once onions are caramelized, stir in the white wine and bring the mixture to a boil.
- Sprinkle in the flour, stirring continuously, and let cook for 1-2 minutes to thicken.
- Slowly pour hot broth into the onion mixture. Season with ¼ teaspoon salt and black pepper. Simmer uncovered for about 10 minutes, adjusting seasonings to taste.
- Preheat your broiler. Ladle soup into ovenproof bowls placed on a baking tray.
- Top each bowl generously with bread slices, then sprinkle with plenty of grated Gruyère cheese.
- Broil for 1-2 minutes until cheese is bubbly and golden. Serve immediately and enjoy!
