Generally 20-30 minutes. Sweet potato flour hard texture, before eating need to soak to make the noodles soft and elastic, so that the cooked ingredients will taste strong, Q elastic, and soak the dry sweet potato flour time to grasp, too long, sweet potato flour will appear soft, broken and so on, but also the loss of most of the nutrients, and too short a period of time, the internal absorption of water in the sweet potato flour is less, there will be some hard texture, so the dry sweet potato flour, generally recommended to use about 50 ° water soak 20-30 minutes can be used. Sweet potato flour, it is generally recommended to soak in about 50 ° of water for 20-30 minutes.

How long can sweet potato vermicelli be kept:

Sweet potato vermicelli is divided into dry and fresh. The preservation period of sweet potato vermicelli, powder preservation period in 2 years, fresh powder preservation period in two months. Fresh flour if due to damage on the top of the package, will reduce the service life earlier.

Under the natural environment of room temperature, the coarse dried sweet potato vermicelli can be put 18 months up and down, the fine dried sweet potato vermicelli can be put 24 months. If it is refrigerated in the natural environment, it can increase the shelf life by 6 months more than the room temperature.