Sweet potato syrup is our favorite dessert. Peel the sweet potato, wash it, boil it in water, and add rock sugar. It looks very simple. But many people cook sweet potato syrup. Sweet potatoes are brown, potato pieces have been cooked, and there is precipitated sweet potato powder in the syrup. The sugar water cooked in this way is not clear enough. Sweet potatoes are good things. It contains tannin and oxidase. But these things turn brown when they meet iron. Sweet potato contains pectin, which we call sweet potato milk. Pectin also accelerates the decomposition of starch during heating. So it is necessary to know how to cook a bowl of sweet and fragrant sweet potato syrup. Tip 1: Avoid iron contact with sweet potatoes. It is best to scrape the skin with a bamboo knife. Pry it into potato pieces. To look good, I cut the sweet potato into square cubes with a steel knife. Tip 2: After the sweet potato is cut into pieces, soak it in clear water for about five hours. Change the water frequently when soaking. This is to dissolve pectin in sweet potato pieces. Tip 3: after soaking, take out the potato pieces and dry them. Tip 4: It is best to use a earthen pot, first heat the bottom of the pot, then stir-fry a flat piece of ginger with a little lard, stir-fry the potato pieces, and add water to cook. This sweet potato syrup looks complicated. Save the last process. But there is another material: lily. Lily and sweet potato are cooked together, and then added with rock sugar. In this way, lilies are also fresh and delicious. And boiled sweet potato syrup with sweet potato pieces soaked in water, sweet potato pieces are tough, the soup color is clear, the entrance is sweet and smooth, and hot and cold drinks are attractive. Using two different varieties of sweet potatoes, plus one hundred contracts, the four colors of yellow, purple, red and white are quite pleasing to the eye. Sweet potato lily syrup: materials: egg yellow sweet potato, purple sweet potato. Lily. Rock sugar. Ginger slices. Practice: 1, cut the sweet potato into squares. Soak in clear water for about five hours. Change the water frequently when soaking. 2. After soaking, take out the potato pieces and dry them. Wash lilies. 3. Stir-fry a flat piece of ginger thoroughly, stir-fry the potato pieces and add water to cook. Sweet potato is cooked, and after rock sugar, lily is added. Boil sweet potato syrup with sweet potato pieces. Sweet potato pieces are tough, the soup is clear, and the entrance is sweet and smooth.