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.