Corn husk will not change or alter the flavor of the sticky rice. It doesn't give the rice any flavor. Only color. The purple sweet potato powder also doesn't give the rice any flavor. it's also used for the color. The purple cabbage does give the rice a cabbage smell but after the rice is steamed, that smell does seem to disappear (or at least it didn't bother me). So if you're a little sensitive to the funk of cabbage, you might not want to use it. One "rice cup" is equal to about ¾ US cup.