Chilled Herb Soup Recipe

Chilled Herb Soup Recipe

  • 1 1/4 pounds sweet onions such as Vidalia, chopped (about 4 cups)
  • 1/2 stick (1/4 cup) unsalted butter
  • 1/4 cup all-purpose flour
  • 4 cups chicken broth
  • 2 cups water
  • 3 cups loosely packed fresh flat-leafed parsley leaves, washed well and spun dry
  • 1 cup chopped fresh chives (about 3 bunches)
  • 6 tablespoons loosely packed fresh tarragon leaves
  • 3 tablespoons fresh thyme leaves (preferably lemon thyme)
  • 3/4 cup sour cream
  • 1 1/2 tablespoons fresh lemon juice, or to taste
  • Garnish: sour cream, finely chopped fresh chives, and fresh thyme sprigs
  1. In a 4- to 5-quart saucepan cook onions in butter with salt and pepper to taste over moderately low heat, stirring, until softened. Add flour and cook, stirring, 3 minutes. Stir in broth and water and simmer, stirring, 2 minutes, or until slightly thickened. Add herbs and simmer 1 minute.
  2. Remove pan from heat and let mixture cool slightly. In a blender puree mixture in small batches until very smooth, forcing as pureed through a fine sieve into a bowl. Whisk in sour cream and salt and pepper to taste. Chill soup, covered, until very cold, at least 4 hours and up to 24.
  3. Just before serving, stir in lemon juice and season with salt and pepper. Garnish soup with sour cream and herbs.
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