What is a defining characteristic of Bisque soup?

A defining characteristic of Bisque soup is that it is primarily made from shellfish. Traditionally, bisque is a smooth, creamy soup that is often prepared with crustaceans such as lobster, shrimp, or crab. The process involves sautéing the shellfish and incorporating their shells to enhance the flavor, followed by simmering with aromatic vegetables, stock, and cream. This method creates a rich and velvety texture that is highly valued in culinary practices.

While various ingredients can be added to bisque, such as aromatics and sometimes a splash of sherry, the essence of a true bisque rests in its shellfish base, elevating it above other soups with distinct characteristics. Other options, such as being vegetarian or having to be served cold, misrepresent the traditional attributes of bisque. Additionally, while rice can be used in some soups as a thickener, it is not a defining element of bisque.