Arrowroot is a white powder extracted from the root of a West Indian plant, Marantha arundinacea. It looks and feels like cornstarch. Geographical Sources Arrowroot is grown in Brazil and Thailand Traditional Ethnic Uses Arrowroot is used as a thickening agent for sauces, fruit pie fillings and glazes, and puddings. Taste and Aroma Arrowroot has no flavor. History/Region of Origin Arrowroot is indigenous to the West Indies, where native people, the Arawaks, used the powder. The Arawaks used the substance to draw out toxins from people wounded by poison arrows. Its name is thought to be derived from that practice. A Few Ideas to Get You Started Arrowroot mixtures thicken at a lower temperature than mixtures made with flour or cornstarch. Mix Arrowroot with cool liquids before adding hot liquids, then cook until mixture thickens. Remove immediately to prevent mixture from thinning. Two teaspoons of Arrowroot can be substituted for 1 tablespoon of cornstarch. One teaspoon of Arrowroot can be substituted for 1 tablespoon of flour. Arrowroot makes clear, shimmering fruit gels and prevents ice crystals from forming in homemade ice cream.