If the bought spades are sour, it means they are not mature enough. This spades can be cooked, its fructose concentration will be higher, and it will taste sweeter. However, how long it takes to sweeten is related to the maturity of raw materials and cooking methods. If it's not a particularly raw spades, it will be sweet in about 3-7 days.

Immature black bells can be placed with mature fruits with strong respiration, such as apples and bananas. These fruits will produce some ethylene gas, which has the effect of ripening. Putting hard black cloth and these fruits together can have the effect of ripening.

Black Brin ripening method

1, ripening with bananas: If the black bell feels hard and unfamiliar, it is really crucial to choose the appropriate ripening method. You can't eat spades that are not ripe. In the method of ripening black bell, you can choose to put black bell root bananas together to accelerate their oxidation, so that the ripening speed is very fast.

2. Heating to ripen: Putting black bell in a high temperature environment can also play a good role in ripening, and it is best to put it in a greenhouse. This method of ripening is the fastest. Generally, black bell can ripen in two days, and can ripen in one day at the earliest, but the ripened black bell should be eaten as soon as possible, otherwise it will rot.