White vinegar is a common sour auxiliary material for cooking. The main raw materials for making white vinegar are water, rice, edible alcohol, edible salt, etc. White vinegar has the characteristics of bright color and mellow sour taste. Proper consumption of white vinegar can play a role in regulating human metabolism, and adding some white vinegar in strawberry jam can increase the flavor of food.

2 Why does the strawberry jam turn black 1 and the boiling time is too long? In general, the criterion for judging whether the strawberry jam is boiled well is that there are no large strawberries and the strawberry jam is sticky. If the boiling time is too long, the strawberry jam is easy to paste off. The strawberry jam in this case will not only make the strawberry jam appear black, but also give off an unpleasant burnt smell.

2. The cookware used is not suitable for cooking strawberry jam. Metal materials such as iron pan or aluminum pot cannot be used. Strawberry contains a kind of fruit acid, which will react with metal ions and then blend into the jam, making the color of strawberry jam black.

Tip: When cooking strawberry jam, it is best to use stainless steel pot or casserole.

3 Can you eat strawberry jam in an iron pot when it is black? It is recommended not to eat it.

Strawberry is rich in fruit acid, which will react with metal ions in the iron pot and then generate compounds, which will make the color of strawberry jam black. Under normal circumstances, the taste of this strawberry jam will not be very delicious, and its nutritional value will be destroyed. After eating, it will be harmful to health, and it will easily cause symptoms such as diarrhea, abdominal pain and vomiting. If it is not treated in time, it will cause serious symptoms such as blood coagulation and hypoxia.

How long can homemade strawberry jam last for about 3 months?

Generally, the ingredients in homemade strawberry jam are relatively simple. The main materials are: fresh strawberries, sugar, purified water, etc., and there are no additives, so the storage time should not be too long. It can be kept for about 3 months in the refrigerator.

Tip: If it is strawberry jam bought in the market, it can be judged according to the shelf life on the manual.