What type of soup is Vichyssoise?

Vichyssoise is a specific type of soup that is primarily made from pureed leeks, potatoes, cream, and chicken stock, and it is served cold. The combination of potatoes and leeks gives it a unique, creamy texture and a subtle flavor that distinguishes it from other soups. Its cold serving temperature sets it apart from traditional soups, which are typically hot. This characteristic aligns perfectly with the definition of a cold potato and leek soup.

The other options consist of soup types that do not match the ingredients or serving style of Vichyssoise. A hot vegetable soup does not emphasize potatoes and leeks specifically or the cold serving aspect. Chicken broth is a basic soup base rather than a creamy, pureed preparation. A mushroom bisque, while also a type of creamy soup, focuses on mushrooms rather than potatoes and leeks.