Definition of 'optimum'. optimum (ÉptÉªmÉm ) or optimal. The optimum or optimal level or state of something is the best level or state that it could achieve. Aim to do some physical activity three times a week for optimum health. ...regions in which optimal conditions for farming can be created.
Use Tapioca Flour. Also know as tapioca starch, it's a great substitute. You'll want to use 2 tablespoons for every 1 tablespoon of cornstarch. Use Rice Flour. Rice flour thickens up like regular flour so use the same proportion: 3 tablespoons for every 1 tablespoon of cornstarch.
A good cornstarch substitute is all-purpose flour or arrowroot. Flour is the most common substitution, but it is not an exact one. It requires more flour to accomplish the same thickening that cornstarch is capable of, so if a recipe requires one tablespoon of cornstarch, then 3 tablespoons of flour should be used to achieve the same results.