French Onion Soup

French Onion Soup

Serves 4 533 kcal per serving Prep 15 min Cook 50 min

Ingredients

  • 50g Butter
  • 1 tbs Olive Oil
  • 1 kg Onion
  • 1 tsp Sugar
  • 4 sliced Garlic Clove
  • 2 tbs Plain Flour
  • 250ml Dry White Wine
  • 1L Beef Stock
  • 4 sliced Bread
  • 140g Gruyère

Instructions

  1. Melt the butter with the olive oil in a large heavy-based saucepan over medium heat. Add the thinly sliced onions, cover and cook for about 10 minutes until softened.
  2. Remove the lid, sprinkle over the sugar and continue cooking for around 20 minutes, stirring frequently, until the onions are deeply golden, sweet and caramelised. Watch carefully towards the end to prevent burning.
  3. Add the sliced garlic for the final few minutes, then stir in the flour until evenly coated. Increase the heat slightly and, stirring constantly, gradually pour in the white wine, followed by the hot beef stock.
  4. Cover and simmer gently for 15–20 minutes to allow the flavours to develop.
  5. To serve, preheat the grill and toast the bread until golden. Ladle the hot soup into heatproof bowls, top with the toast and scatter generously with grated Gruyère. Grill until the cheese is melted and lightly browned. Alternatively, grill the cheesy toasts separately and place them on the soup before serving.

Tips

  • Patience is vital; don’t rush the onions. They should be a deep mahogany color, not just golden brown.
  • Use a high-quality beef stock (homemade if possible) as it is the foundation of the soup’s flavor.
  • Rub the toasted baguette slices with a raw garlic clove before placing them on top of the soup.

Variations

  • Cider Onion Soup: Use dry apple cider instead of wine and stock for a sweeter, autumnal version.
  • Vegetarian: Use a rich mushroom stock and a splash of soy sauce to replicate the umami depth of beef broth.

Storage

The soup base stores beautifully in the fridge for up to 4 days or can be frozen. Only add the bread and cheese topping just before serving.

Serving Suggestions

  • Use oven-safe crocks so you can melt the cheese under the broiler until it is bubbly and browned.
  • Garnish with a sprig of fresh thyme for aroma.

Frequently Asked Questions

Which cheese is best for the topping?

Gruyère is the classic choice for its melting quality and nutty flavor, but Comté or Emmental also work well.

How long does it take to caramelize the onions?

Expect it to take 45 to 60 minutes for a truly deep, rich flavor development.

Can I use red onions?

You can, but they are sweeter and less pungent, resulting in a soup with a different color and flavor profile.

instructions_source: editorial-classic