How to preserve the coffee beans? how long to keep the coffee beans?

There have been times when you opened the bag of coffee beans and it didn't smell that good; when it was brewed, it didn't taste that good. But this will not happen to coffee beans sent to you by coffee markets, because most coffee beans in coffee markets are freshly baked, and when you get them, they are only over-fragrant during the taste period. But fresh roasting is not the theme of today, today I want to talk to you about how coffee beans should be preserved in order to continue to be strong, mellow and fragrant.

What causes coffee beans to lose their flavor?

1. The aroma of coffee will evaporate gradually

2. Temperature destroys coffee flavor.

3. Direct sunlight will ruin your dear coffee beans.

4. Avoid contact with air.

5. The balance between raising beans and freshness

1. The aroma of coffee will slowly evaporate

Most of the aroma of coffee beans is produced after roasting, and the aroma and carbon dioxide will volatilize over time, basically in a few days after roasting will be the most fragrant, and then slowly fade with time. Most coffee shops or e-commerce stores will put coffee beans in bags with one-way exhaust valves to prevent the aroma from escaping. You can also keep coffee beans in an airtight jar and open the jar when you want to drink.

Don't grind the beans in advance. This will spread the fragrance faster and increase other de-fragrance factors, such as oxidation, which we will talk about later.

2. Temperature destroys coffee flavor.

Temperature accelerates many of the chemical reactions that spoil coffee beans, but that doesn't mean you need to refrigerate or freeze them. But remember not to put it in too hot places, such as kitchen often high temperature, engine room, near the heater.

3. Direct sunlight will destroy you, dear bean.

If your coffee beans are in glass bottles or other transparent containers, don't let them get directly exposed to sunlight. The temperature and ultraviolet rays brought by sunlight will affect coffee beans. Even if your coffee beans are in opaque bags or jars, avoid direct sunlight. This principle applies to most foods.

4. Avoid contact with air.

The fatty acids in coffee beans 'natural oils, when exposed to oxygen, eventually turn into short-chain fatty acids, which are the source of oil odors. If you don't want your coffee to "stink, stink. Take out the beans only when you want to drink them, and seal them properly.

5. The balance between raising beans and freshness

From the above points, it seems that drinking coffee beans immediately after getting them is the most delicious?

No, that's not true.

Usually baked beans, even if placed in a closed bag, does not mean that it has always been static, it will continue to emit carbon dioxide and many aromatic gases. At the beginning, the aroma increased more and disappeared less. After two weeks of baking, the increase of aroma slowed down, but the disappearance of aroma persisted. So coffee beans are at their best between one week and three weeks after roasting. This is the best tasting period. However, the characteristics and roasting degree of each coffee bean are different, and the best taste period will be more or less different.

But seriously, the sweet spot doesn't represent the true shelf life of coffee beans. It is generally believed that unopened coffee beans can be preserved for three months to six months, but each country has different views on this matter. For example, South Korea believes that coffee beans can be preserved for one year, while Germany treats them with very strict standards. In any case, drinking them as soon as possible is the most important!

Let's do a little recap before we leave:

How do you best preserve coffee beans?

Sealed, oxygen-free.

If coffee beans are constantly exposed to oxygen, they will continue to oxidize, just like other foods.

Keep at room temperature or lower.

At lower temperatures, oxidation occurs more slowly.

Stay out of the sun.

This is also why most coffee bean packaging, in fact, will deliberately prevent light from entering!

1~3 weeks after baking is the best taste period

Coffee beans are still fresh food after all, if the beans are raised, brewing as soon as possible is the best!