1. If the brewing fails, you can eat it: lotus root powder is a food made of lotus root, which tastes smooth and has the fragrance and sweetness of lotus root. Normal lotus root starch is transparent after brewing. If it is brewed, there are many bubbles in it, which contain some powder. This shows that the brewing of lotus root starch failed. If so, it's edible, but it doesn't taste good.

2. If it is because there is adulterated powder in it, it is not recommended to eat it: because lotus root powder is rich in iron and reducing sugar, it will undergo an oxidation reaction with air, and the color will change from white to reddish when brewing, and the brewed lotus root powder will also be translucent and gelatinous, but if mixed together, it will be pure white or yellowish powder, which may be adulterated powder. If this is the case, it is not recommended to eat.