Est. 1982. Bring the taste of Louisiana home! Gumbo File is a spice produced from dried and ground sassafras leaves. Gumbo file can be added to gumbo and soups to provide thickness and extra flavor. LouisianaFishFry.com. Try our other Louisiana fish fry products' spices and seasonings: Cayenne pepper, cajun seasoning, blackened seasoning and crawfish, shrimp & crab boil.