Why do persimmon cookies turn black?

The reason why persimmon turns black in the sun is that the pulp is oxidized and turned black.

The peeled persimmon fruit will slowly oxidize and turn black in the air. After drying for a long time, the degree of oxidation will become heavier and heavier, and the skin color will become darker and darker. This is normal. If the persimmon is not dried in a ventilated and dry environment, it will not be turned frequently when it is dried, which will easily lead to the persimmon being damp, moldy, black and inedible.

If the persimmon is seriously black and wet and smells a little strange (not the faint fragrance of the persimmon itself), it is moldy and should be thrown away as soon as possible. Persimmon is a kind of preserved fruit that people prefer to eat. Sweet and delicious, rich in nutrition and unique in flavor. Persimmon cakes have high nutritional value, and the contents of vitamins and sugar are about 1 ~ 2 times higher than those of ordinary fruits.

Selection method of persimmon cake:

1, depending on the persimmon size.

It is best to choose big persimmons. Little persimmon is generally not a mature or late-maturing persimmon, so even if it is made into a persimmon, it is not sweet and astringent. Little persimmon is not recommended, but a big one is recommended.

2. Look at the shape of persimmon

Usually, persimmons sold in the market have two shapes. One is flat and round, and the other is shaped like a steamed bun. Wotou has a lot of this kind of meat, but it's not easy to cook in the sun. Purchase is not recommended. I suggest you buy oblate persimmons. Moreover, the flat persimmons should be seen clearly, and the ones that are not damaged and cracked are the best, and there are no rot, deterioration and black spots.

3. Look at persimmon icing.

The layer of frost on persimmons is naturally formed in the process of drying, so if you find persimmon cream during selection, don't think it is fake. But in order to make persimmon look better, criminals will sprinkle flour or even talcum powder on its surface to pretend to be hoarfrost.

It is not difficult to tell the difference between true and false hoarfrost. You can shake persimmons Natural frost is not easy to shake off, and it may be artificially added frost. In addition, natural hoarfrost melts in the mouth, but it can't be added artificially.

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