1. Wash the sweet potato first, and then peel it.

2. Cut the sweet potato into shreds with a grater.

3. After shredding, add sweet potato starch and knead it into a ball. Repeat this step until the water is clear.

4. Filter the kneaded water with gauze and pour it into the bucket.

5. After standing for half a day or a day, the starch precipitates. The top of the barrel is water and the bottom is starch. Pour out the water.

6. Add water to dilute the starch.

7. Steam in the pot for two minutes, and take it out after discoloration.

8. Take out the vermicelli and soak it in cold water.

9. Cut the powder after cooling.

10, complete the chart.