Preparation materials: sweet potato, purple potato, sugar, cassava starch, milk.

1. Dice sweet potato and purple potato and steam for 15 minutes.

2. Press the steamed purple sweet potato and sweet potato into mud, add appropriate amount of sugar and cassava starch, mix well, knead into strips and cut into small pieces.

Third, after the water is boiled, add taro and cook for 5 minutes. Put it in ice water immediately after picking it up.

Fourth, after passing through the ice water, pick it up for use.

5. Add milk, sago, etc. According to your own preferences.