Authentic sweet potato flour is white when it burns.

If it is pure sweet potato vermicelli, the surface of sweet potato vermicelli will bubble and produce white ash when it burns. If talcum powder is added, the surface of the vermicelli will have hard clumps and will not burn easily. If flour is added to the noodles, there will be white smoke and bad odor when it burns. No matter what kind of sweet potato flour, there will be smoke coming out when it is lit, and most of them will carry the smoky odor of burning.

The authentic sweet potato flour discernment

One, look at the appearance

Buy sweet potato flour first look at the appearance of the real sweet potato vermicelli color is not necessarily the same, some may be yellow, some may be white, some will be yellow and white, this is in fact, and the varieties of sweet potato as well as simmering the fire has a lot to do. On the contrary, those who have a consistent color, and the color of translucent white, may not be the real sweet potato flour.

Second, touch

The real sweet potato vermicelli is not very cucumber if you touch it with your hand, the surface will be uneven, individual vermicelli is even a little rough. And it looks like a uniform strip, flat straight, and smooth feel of the noodles, it is not necessarily true sweet potato flour.