How can roasted coffee beans be preserved to avoid stale? How many degrees should coffee beans be stored?

Although high-quality baked beans are important, how to improve the preservation of beans is a key problem. Coffee is also a kind of food, so it should be well preserved to make sure it is stable and will not go bad. Although South Korea legally stipulates that coffee beans are valid for one year, in fact, the preservation of beans is related to the period of gas loss in coffee beans. Generally speaking, the larger the bean dryer, the longer the gas emission time and the longer preservation time, while the smaller the bean dryer, the shorter the taste period of the baked beans. Beans baked from a bean baking machine with a baking capacity of less than 30kg are usually thought to be better used within a month. If the fat composition of coffee beans is oxidized, producing a taste like cooking oil or cigarette ash, do not eat it.

Preserve coffee beans in an unground state

Coffee from the moment it is ground, its aroma particles will begin to quickly escape into the air, so after grinding, even after a short period of time, a large amount of aroma will float out. So if you grind the coffee beans into powder and save them, you will find that there is a bean grinder next to the espresso machine, which is to preserve the aroma of the coffee as much as possible and extract it as soon as you grind the coffee powder. let the aroma of coffee blend into the coffee as much as possible.

Keep in a place where there is no moisture

The moisture content of baked beans is usually between 1% and 2%. If the weather is wet, the moisture will be inhaled, and the absorbed water will have an effect on the coffee. This phenomenon is known as "unexpected early extraction", which can quickly deteriorate the aroma of coffee and produce a bad smell.

Use a sealed container or package

Although it is said that roasted coffee beans will not rot because of their low water content. On the other hand, because coffee is a seed crop, it contains a high amount of fat, and if it comes into contact with oxygen, it will begin to become sour and rotten. Therefore, it is better to use a closed container that can isolate oxygen as far as possible. When preserving coffee, the most important thing is to isolate the light and the outside air. For this reason, almost most of the bags containing coffee are aluminized to block air and prevent light from entering.

The best way to preserve coffee is to use tinned cans to preserve coffee. But if you go to most coffee shops, you will find that many stores use transparent sealed bottles to preserve coffee. This is based on the consideration of display, because the store has to show the coffee before it can be sold. The coffee in this kind of coffee shop is usually sold quickly, so the possibility of bad taste due to improper preservation can be said to be very small.

It is better to keep it at room temperature between 10 and 20 degrees C.

It is better to use up the coffee quickly before it goes bad at room temperature. However, if you have to save a lot of coffee and can't run out of coffee before it turns sour, it's also a way to keep the coffee in the refrigerator.

But the average refrigerator stores other foods at the same time, so if you put coffee with the food, coffee may absorb these smells, so it is not recommended. It is better to use a container that can be completely sealed unless you have to store it in a cold storage.

You can keep it longer if you freeze it, but there are still a lot of things to pay attention to. If the seal is opened immediately after it is taken out of the freezer, moisture will condense on the surface of the beans because of the temperature difference. Therefore, after taking out the stored beans from the freezer, if you immediately open them to pour out the desired amount, and then put the beans back into the freezer and do this several times over and over again, it will make the beans taste as bad as soot.

After taking the coffee out of the freezer, do not open it, leave it at room temperature for 1-2 hours, and then extract the coffee when the temperature of the beans is about the same as the room temperature. Or it is also a way to keep the portion to drink in a small chain bag in advance.