Sep 21, 2017· Potato Starch Works Better Than Cornstarch When Making Sauces. ... Cornstarch of cornflour is a fine, powdery starch that's made from corn. It is a pure starch thickener, so compared to flour, a smaller quantity is needed to thicken the same amount of liquid. ... 3 Tapioca Starch. Extracted from the cassava root, tapioca starch is one of the ...