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.
No they are NOT the same. Corn flour is the entire corn kernel milled into flour. It contains protein and fat as well. Corn starch is just that - starch. It is chemically seperated from the protein and other components of corn flour. However they can sometimes be used interchangeably, especially in soups and stews. But for breading and deep frying, you cannot substitute corn starch for corn flour.