1, sweet potato flour can not use boiling water, you should use warm water, about 50 degrees can be.

2, Note: the hard texture of the vermicelli, just with cool water, even if soaked for a day is difficult to soak open. Not completely soaked open vermicelli, not only eat up the hard taste bad, and put into the pot will seriously absorb the soup. Not only the soup in the dish are sucked out, but also cause the trouble of paste pot.

3, in addition, can not use too hot water. Soaking in boiling water will lead to the internal vermicelli has not had time to absorb the water, the outer layer has become rotten and powdery, and if you do the dishes again, it is easy to rot into a paste.