Arrowroot is a thickner used in place of flour or cornstarch. Use Arrowroot in puddings, pie fillings, custards, meat glazes, and other sauces. Arrowroot blends and thickens before boiling - Do not over cook.2 1/8 oz. (61 grams) net wt. packaged in a 4 oz. glass spice jar. Contains: Arrowroot.