Morton & Bassett, Seasoning Gumbo File, 0.9 Oz(Case Of 3)Product Description Seasoning gumbo file also known simply as file powder is a seasoning made from dried and ground leaves of the sassafras tree. It is traditionally used in cajun and creole cuisine, particularly in gumbo, a hearty, flavorful soup or stew that originates from louisiana. The powder is used both as a thickening agent and a seasoning in the dish. When added to gumbo or other dishes, file imparts a distinctive, slightly peppery, and