🍳 Step-by-Step Preparation
1. Prepare the onions
Peel the onions and slice them thinly. To avoid tears, run your knife under cold water before cutting.
2. Sauté the onions
Melt the butter in a large pot over medium heat.
Add the sliced onions and cook slowly for 10–15 minutes, stirring often, until they are golden and soft.
3. Add the flour
Sprinkle the flour over the caramelized onions and stir to coat evenly.
Cook for 1 more minute to remove the raw flour taste.
4. Add the broth
Gradually pour in the hot broth while stirring to avoid lumps.
Bring to a boil, then reduce the heat and let simmer, covered, for 20 minutes.
Season with salt and pepper to taste.
5. Prepare the soup bowls
Preheat the oven to 200°C (400°F).
Ladle the hot soup into 4 ovenproof bowls. Place a slice of bread on top of each and sprinkle generously with grated Gruyère.
6. Broil until golden
Bake the bowls for 5–7 minutes, or until the cheese is melted and golden.
For extra richness, mix the Gruyère with a bit of grated Parmesan before baking.
💡 Tips & Variations
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Aromatic twist: Replace part of the broth with 100 ml (about ½ cup) of dry white wine for a lighter, more fragrant version.
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Hearty option: Add diced potatoes or root vegetables like carrots for a thicker, more filling soup.
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Cheese variations: Try Comté or Emmental instead of Gruyère for a different flavor.
🍷 To Serve
Serve piping hot with a glass of dry white wine or crisp cider.
A true French delight that brings warmth and comfort to any meal — perfect for cozy dinners in any season.
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