Vichyssoise
Ingredients
- 1 1/4 pounds leeks – white and light green parts only, thinly sliced and well rinsed (~4.5 medium leeks)
- 4 tbsp unsalted butter
- 1 pound Yukon Gold potatoes – peeled and thinly sliced (~3 medium yukon gold potatos)
- 1 1/4 tsp kosher salt
- 1/4 tsp white pepper – ground
- 4 cups chicken stock
- 1 cup heavy cream
- chives – finely chopped (for serving)

Instructions
- 1.
Trim the leeks, split lengthwise, and rinse thoroughly to remove grit; thinly slice the white and light green parts.
- 2.
Melt the unsalted butter in a large pot over medium-low heat. Add the leeks and cook, stirring occasionally, until very soft and translucent but not browned, 10–12 minutes.
- 3.
Add the Yukon Gold potatoes, kosher salt, and white pepper. Stir to coat, 1 minute.
- 4.
Pour in the chicken stock, bring to a gentle simmer, then reduce heat to maintain a bare simmer. Cook until the potatoes are very tender and beginning to break apart, 15–20 minutes.
- 5.
Remove from heat and purée the soup until perfectly smooth using an immersion blender, or blend in batches with the lid vented and a towel held over the opening. For an extra-silky texture, pass the purée through a fine-mesh sieve back into the pot.
- 6.
Stir in the heavy cream and warm the soup just to a bare simmer, 1–2 minutes, without boiling. Remove from heat.
- 7.
Set the pot in an ice bath and stir occasionally until the soup cools to room temperature, about 20–30 minutes. Transfer to a covered container and refrigerate until thoroughly chilled, at least 2 hours.
- 8.
Stir, taste, and adjust seasoning if needed. Ladle into chilled bowls and garnish with chives. Serve cold.
Vichyssoise is a velvety, chilled leek-and-potato soup enriched with cream, prized for its clean oniony sweetness and luxurious, silky texture. Served cold, it is refreshing yet deeply satisfying, with a pale ivory color and a delicate aroma of leeks. A sprinkle of fresh chives adds a gentle bite and a grassy freshness that lifts each spoonful.
The dish is widely credited to chef Louis Diat of the Ritz-Carlton in New York around 1917, who adapted a warm French leek-and-potato soup from his childhood—often called potage Parmentier—by serving it chilled. He named it in homage to Vichy, a spa town near where he grew up. Vichyssoise quickly became an American fine-dining staple, straddling French roots and New World popularity, and remains a classic example of refined, cream-enriched vegetable soups served cold.
