4 tbsp. unsalted butter

3 medium leeks, white and light green parts only, roughly chopped

2 medium white onions, roughly chopped

1 medium russet potato, peeled and roughly chopped

8 cups chicken stock

1 dried bay leaf

Kosher salt and freshly ground black pepper, to taste

12 cup crema or sour cream

2 tbsp. finely chopped chives

Olive oil, for garnish


Heat butter in a 4-qt. saucepan over medium heat. Add leeks, onions, and potato, and cook, stirring often, until soft, about 20 minutes. Add stock and bay leaf, and cook, stirring occasionally, until potato is very tender, about 35 minutes. Transfer to a blender and purée until smooth, at least 2 minutes; season with salt and pepper. Transfer to a pitcher or bowl and refrigerate until chilled, about 2 hours.

To serve, divide chilled soup among serving bowls and dollop with a spoonful of crema, sprinkle with some of the chives, and drizzle with a couple drops of olive oil.