The sweet potatoes that need to be selected for processing dried potatoes should be cleaned of the surface soil with water. When cleaning, it is advisable to rinse avoid rubbing vigorously in bamboo utensils. This will damage the surface fine skin is conducive to peeling after cooking. Divide the cleaned sweet potatoes into small large batches steam them in a steamer.

When cooking, the fire should be high. The determination of steaming time should be based on whether the sweet potato has just passed through the heart, as it is easier to process. However, if it has passed through the heart, the processed dried potato will have a dark color a peculiar smell; But overcooking, no adhesiveness, becomes meager, is conducive to cutting. After steaming, it should be taken out of the cage cooled in a timely manner. Place the thin long strips that have been cut on the fire bed frame, without overlapping them. Bamboo weaving is preferred for the fire bed frame.

When heating the kang, the fire can start slightly higher, when the kang is half dry, it gradually turns to a low fire. If the fire is too strong, it can easily scorch spoil the flavor of the French fries, resulting in a blackened color that forms a separation layer an empty shell; If the fire is too small, the duration of the kang will also affect its quality. When the kang is 80% dry, it should be removed for cooling. To accurately grasp the dryness of the kang, you can chew it by mouth. When chewing, it is soft soft, so that the hardness is suitable.

If the kang is too dry to chew when eaten, it will affect its quality, but if the heat is sufficient, it will have more moisture be prone to mold decay. After fully cooling the prepared potato chips, place them in a porcelain jar other airtight container. Generally, after being sealed for about half a month, a layer of white frost will naturally grow on the surface of French fries. This layer of white frost is called "potato frost", which is the sweet potato sugar that overflows inside the French fries. The potato chips with potato cream are dried potatoes. The dried sweet potato processed in this way has the characteristics of sweet, delicious, unique flavor.