Real sweet potato vermicelli will swell after being burned with fire. It will turn white in color and have a fragrance. This is the taste of carbohydrates. It will break into powder when you pinch it with your hands. This is the old-fashioned kind bought on the street. The traditional popcorn cone is the same thing.

If the vermicelli is mixed with glue, it will turn black when heated with fire and stick to a big lump, which is very hard when pinched. This is because of the characteristics of glue. If the boss doesn't burn, be careful with this kind of vermicelli.

Other identification methods:

1. Take a look

Sweet potato vermicelli comes in many colors, but the most common ones are yellowish brown and darker in color. If the color It's so bright, it must be fake. The texture is translucent with many small bubbles. If it is completely transparent and has no bubbles, it is fake.

2. Smell it

Real sweet potato starch has a natural fragrance of sweet potato starch, which smells good. But if you can’t smell the fragrance, or even have a sour, musty, or even pungent smell, and are either broken or have chemicals added, they are considered inferior noodles, so don’t buy them no matter how cheap they are.

3. Make a fold

Real vermicelli is made of starch, such as sweet potato starch, potato starch, pea starch, etc. Since it is starch, its toughness will definitely not be very strong. , it can be slightly bent, but it will still break if you bend it hard. After all, the binding force between starch and starch is very small. If it doesn't break no matter how you bend it, it's made of edible glue.