Physical: Powder Category: Seeds/Spices Description: Arrowroot is a white powder extracted from the root of a West Indian plant, Marantha arundinacea. It looks and feels like cornstarch. Arrowroot is grown in Brazil and Thailand. Application: Arrowroot is used as a thickening agent for sauces, fruit pie fillings and glazes, and puddings. Arrowroot has no flavor.