What is the oil powder on the sweet potato powder?

It may be oxidized by impurities. The removal method is as follows:

Step 1: Screen the sweet potatoes and remove the bad ones.

In the second step, the sweet potato is washed and then ground, which is the most important and crucial step. Ensure that the soil on the sweet potato is cleaned repeatedly, at least 3 times. In this way, the starch or vermicelli made in the future will not have sand and will not taste stale.

Step three, filter residue.

Filter the residue with gauze with fine mesh to ensure that the potato residue is filtered clean.

The fourth step is precipitation. The starch slurry after residue filtration was precipitated overnight. Water was released the next day, and the starch below precipitated. Two-thirds of the upper layer is skimmed and put together separately, and the starch with more impurities in the lower part of 1/3 is put together separately.

Because the purity of sweet potato starch is closely related, there will be something called "dry powder strips" in the process of making sweet potato starch. Dried vermicelli floating on sweet potato starch is not easy to clean, and the color is black when the content of dried vermicelli is high. I didn't want to make vermicelli in the countryside before. ...

The oil powder in sweet potato powder is edible, because it is also the extract of sweet potato, so it comes from natural consumption. As food, some things are extracted from the essence, and the oil powder in sweet potato powder is naturally the essence of sweet potato powder. ...

Buying sweet potato vermicelli is not cheap. It takes a lot of processing to make sweet potato fans. Our hometown is called Nanfen (hard powder), which also shows that it is not easy to be a fan. Now there are four or five fans on the market, all of whom are not authentic sweet potato fans, inferior, fake and so on. line ...