Sweet potato starch is generally in granular form, including coarse grain and fine grain. Generally, coarse grain is preferred when purchased at home.
Like corn starch, sweet potato starch will appear sticky when heated after being dissolved in water, and the viscosity of sweet potato starch is higher than that of corn starch,
Therefore, sweet potato starch is less used in thickening Chinese dishes because its viscosity is difficult to control. Sweet potato starch is widely used in the production of Chinese Dim sum, such as mountain flour dumplings.