French Onion Soup with Gruyere Cheese

Lorenza Ávila
French onion soup is a classic dish and truly a delicacy. Follow the exact steps and take your time to ensure it turns out spectacular; it's worth it!
Reviewed by Editorial Team of Kiwilimón
4.75
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Ingredients
6
Servings
  • 1/4 cups butter
  • 1 tablespoon olive oil
  • 2 kilos onion, sliced
  • 1 teaspoon fresh thyme, chopped
  • 1 teaspoon sugar
  • 1 tablespoon sherry vinegar
  • 6 1/4 cups chicken broth, or beef broth
  • 1 1/2 tablespoons flour
  • 2/3 cups dry white wine
  • 3 tablespoons brandy
  • pepper
  • 6 slices baguette, from the previous day, thickly sliced
  • 1 clove garlic, cut in half
  • 1 tablespoon Dijon mustard
  • 1 cup Gruyère cheese, coarsely grated
Preparation
2h
0 mins
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  • Melt the butter with the oil in a large pot.
  • Add the onions and stir until they are well coated.
  • Cook on low heat for 5-8 minutes, stirring occasionally until they start to soften.
  • Add the thyme.
  • Reduce the heat to very low, cover the pot, and cook for 20-30 minutes, stirring frequently until the onions are very soft and golden yellow.
  • Uncover the pot, raise the heat, add the sugar, and cook for 5-10 minutes until the onions start to brown.
  • Add the sherry vinegar and raise the heat again.
  • Continue cooking until the onions darken a bit. (This may take up to 20 minutes.)
  • In the meantime, bring the chicken (or beef) broth to a boil.
  • Add the flour to the onions and stir constantly for 2 minutes.
  • Gradually add the broth, then the wine and the brandy.
  • Season with salt and pepper.
  • Boil for 15-20 minutes.
  • For the bread, preheat the oven to 180 degrees. Place the bread slices on a baking sheet and bake for 15-20 minutes until golden brown.
  • Spread half of the garlic, brush with mustard, and sprinkle the bread slices with Gruyere cheese.
  • Place the soup in oven-proof deep plates and place the bread on top. Put it in the oven on high broil until the cheese melts and starts to bubble.
  • Serve immediately.

Nutritional Information

* * Information per 100g serving, percentage of daily values based on a 2,000 calorie diet.
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