Brasserie Balzar's Midnight Onion Soup

Total Time:
1 hr 25 min
Prep:
25 min
Cook:
1 hr

Yield:
4 servings
Level:
Easy

Ingredients
  • 6 tablespoons unsalted butter
  • 6 tablespoons peanut oil
  • 3 pounds onions, peeled, halved vertically through the root, and thinly sliced
  • 1 tablespoon fine sea salt
  • 4 tablespoons all-purpose flour
  • 2 cups chicken stock
  • 2/3 cup dry white wine, such as Sancerre
  • 1 1/2 teaspoons freshly ground white pepper
  • Several sprigs fresh thyme, wrapped in cheesecloth
  • Several fresh or dried bay leaves
  • 8 thin slices baguette, toasted
  • 1 pound Swiss Gruyere, freshly grated
  • Equipment: 1 (10-quart) stockpot; 4 ovenproof soup bowls
Directions

In a 10-quart stockpot, melt the butter over low heat. Add the oil, onions, and salt, and stir to coat the onions. Cook, covered, over low heat, stirring occasionally so the onions do not scorch, just until the onions are soft but still pale, about 15 minutes.

Sprinkle the flour over the onions and stir to coat the onions. Immediately add the stock, wine, the white pepper, thyme sprigs, and bay leaves. Bring just to a boil. Immediately reduce the heat to low. Simmer, partially covered, for 30 minutes. Taste for seasoning. (The soup can be prepared up to this point 1 day in advance. Refrigerate in a covered container. Reheat gently at serving time.)

Preheat the broiler.

Ladle the soup into individual ovenproof soup bowls. Top each serving with a slice of toasted baguette. Cover the bread with a thick coating of grated Gruyere. Place under the broiler. As soon as the cheese begins to bubble, serve the soup.


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