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Classic French Onion Soup

Classic French Onion Soup

Rachi Fernandopulle
Caramelised onion soup topped with gratinated cheesy bread
Prep Time 20 mins
Cook Time 20 mins
Total Time 40 mins
Course Soup
Cuisine French
Servings 6 people


  • crockpot


  • 30 g Butter
  • 1 tbsp Oil Olive, canola, vegetable
  • 1 kg Brown onion (approx 6 large onions) Thinly sliced
  • 1 tbsp White sugar
  • 185 ml White wine Dry wine
  • 2 tbsp Flour All purpose
  • 1.5 L Beef stock can substitute for chicken or vegetable stock
  • Salt To taste
  • Pepper To taste

Bouquet garni

  • 2 Bay leaves
  • 3 sprig Thyme
  • 1 sprig Rosemary

Toasted bread

  • 6-8 slices Baguette
  • 100 g Cheese (Gruyere, tasty, mozarella)
  • 1 tsp Chopped herbs (Parsley, thyme)


Bouquet garni

  • Using a string, tie togeather bay leaves, rosemary and thyme together and leave aside

French onion Soup

  • In a heavy bottom saucepan add oil and butter, once hot add in the thinly sliced onions, sugar and cook on a low fire for approximately 30 mins until well caramelised and soft
  • Once the onions are caramelised and turned slightly golden brown colour.
  • Deglaze with white wine and scrape all the caramelised parts that are stuck on the bottom of the pan. Let it absorb all the alcohol for 1 minute,then add flour and cook for further 1 minute
  • Then add the stock, Prepared Bouquet Garni and cook on a low fire for 20-30 mins, checking occasionally
  • After 20-30 mins check to season, take the soup off the fire. Take out the bouquet garni and discard

Cheese toast

  • Preheat the oven to 220c (grill mode)
  • Slice the bread and lay it on a flat tray, add oil on all sides
  • Toast the bread in the oven for 2 minutes, take the toasted bread off the oven, add in the cheese on the top of the toasted bread and grill further in the oven for 5-6 minutes. Once the cheese is golden and gratinated take it out of the oven.

Finishing the soup

  • Add the soup into small bowls, and add the cheesy toast on the top, sprinkle with some chopped herbs on the top and enjoy.
    You can also gratinate the whole soup together if you wish to do that, then take the toasted bread, add on top of the soup bowls, sprinkle the top of the bread with cheese and grill in the oven until golden and gratinated.
Keyword Classic French Onion Soup