A list of the contents of this article:

Is it bad that the tofu skin is black?

1. For insurance, it's best not to eat it, but it's not necessarily moldy, it may be some black pepper or other black seasoning.

2. It is not moldy, it may be the impurities in the production process, or it may be the pot ash in the cooking process. Just a few tablets. You'd better not take them.

3. Black spots on the bean skin indicate that it is moldy and can no longer be eaten to see if there is any peculiar smell. If the smell is heavier, or the fishy smell is heavier, then it is bad.

4. Tofu skin jelly is too black to eat. It has gone bad. Tofu is rich in nutrition, contains iron, calcium, phosphorus, magnesium and other essential trace elements, but also contains sugars, vegetable oils and rich high-quality protein, known as "plant meat". The digestion and absorption rate of tofu is more than 95%.

5. Blackening is the result of air-drying oxidation. If the hand touches the dried tofu surface, if there is a sticky feeling, it is a sign of deterioration. If it is very different from what you usually eat, it must be bad, and the food you eat cannot make do with it. If there is anything abnormal, it is best not to eat it. The body is more important than anything else.

6. Tofu skin blackening may have a variety of reasons, the following are some common factors: oxidation reaction: the protein and fat in tofu skin will oxidize after contact with air, producing black oxides.

How to choose and buy tofu skin

This food can be bought at a local specialty store or online. Shuangquan tofu skin is a specialty of Shuangquan Town, Changqing District, Jinan City, Shandong Province. It can be purchased at local specialty stores or online. The local water quality is clear and rich in trace elements, which is suitable for making high-quality tofu skin.

Oilbean curd skin with yellow color, slightly glossy is the best. The color of oil bean rotten skin of poor quality is mostly gray HS, yellowish brown, and the color is dark. Some oil bean curd skin, may also be uneven color, different depth, is a shoddy product. The bean curd skin is made of soybeans and smells like beans.

Good tofu skin, thin and transparent, semicircle but not broken, yellow glossy, soft and non-sticky, smooth surface, milky white and yellowish light.

The tofu skin of good quality, white in color and light in taste, is soft and elastic, thin and even in thickness, neat in shape, and has the aroma of tofu. If it is found that the tofu skin has changed color and taste, it means that it has gone bad, so it can never be eaten.

Do you know how to choose rotten bamboo without falling off the scale and the quality is good?

Look at the packaging of the general formal production of yuba, will be marked on the packaging ingredients list, production date, shelf life and factory location, factory name and other information. It is best not to buy unmarked tofu in bulk.

Look at the color. Yuba with yellow color and slightly glossy is the best. The poor quality of yuba is mostly grayish yellow, yellowish brown, the color is dim. Some rotten bamboos may also have uneven colors and different shades, which are inferior products. Look at the appearance.

Smell: when choosing yuba, you should also smell it. Because it is made of soybeans, it smells like beans. The quality of rotten bamboo without odor is slightly lower.

This kind of tofu skin looks very good, but especially after falling into the scale, there is a hard internal structure after soaking, which will not taste good. Smell, taste high-quality tofu skin take out a piece, smell, there is a pure natural bean aroma, pleasant fragrance, almost no smell, people relaxed and happy.

Some rotten bamboos may have uneven colors and different shades, so they are inferior products. Look at the appearance: good rotten bamboo, facing the light, can see a trace of fleshy fibrous tissue; poor quality can not be seen. Buy rotten bamboo should be careful, no matter how cheap you have to encounter these three kinds of rotten bamboo, do not.

How to choose high-quality rotten bamboo? (1) observe its color. The color of yuba is mostly wheat yellow cut with a faint luster. On the other hand, the color of inferior yuba will be darker, and the color distribution may be uneven. (2) Optical examination.