Where can I buy freshly roasted coffee beans? how long can I keep them? how to boil the coffee and grind it into powder? can I soak it a few times?

Every year in the Singles' Day event, the major coffee bean e-commerce companies offer fracture-like discounts. I believe everyone can't help buying a lot of coffee beans / hanging-ear coffee bags for daily "spiritual food".

There are also many friends who look at the dazzling list of coffee beans and don't know how to choose. Although the discount is attractive, it is really not recommended to hoard beans. After all, coffee beans are a kind of "fresh" food, and their best taste period and flavor preservation period are not long!

How to choose the coffee beans that suit you?

The flavor of coffee varies with the variety of coffee, the climate and soil of the planting area, the treatment of raw beans and the degree of roasting. But for newcomers, it is too difficult to look at this information to choose what is right for them. So we can choose coffee beans that we really don't know according to the degree of roasting / planting area.

If you like coffee beans with bright acid and fresh tonality, you can choose African / medium-light roasted coffee beans, such as Ethiopia and Kenya; if you want less acid, coffee with better aroma can choose Central American / moderately roasted coffee beans, such as Colombia and Costa Rica. If you want to be completely sour, more mellow coffee can choose Asian / deep-roasted coffee beans, such as Indonesia and Yunnan.

How long can the coffee beans be cooked after they are roasted?

As for the coffee beans sold on the street in the past, coffee beans tend to feel choked with smoke when they are first baked. This is because coffee beans produce thick smoke during roasting. Although there is a smoke exhaust system, a small part of the smoke will be "blocked" in the beans along with the carbon dioxide produced by the coffee beans. Freshly roasted coffee beans account for 2% of carbon dioxide in the body and begin to release continuously three hours after baking, which not only protects flavor substances, but also affects coffee extraction.

So we need to put the roasted coffee beans in the original package for more than 3-4 days before cooking (that is, 3-4 days after the baking date). Let the carbon dioxide release a small part through the exhaust valve and take away the choking feeling. At the same time, the release of carbon dioxide makes the pressure in the package higher than an atmospheric pressure, and the pressure contributes to the fusion of aromatic substances and oils. Make all the aromatic substances inside the coffee beans easy to extract. Of course, with the deepening of the roasting degree, the resting time should be extended accordingly, the moderate roasted coffee beans can be extended to 5 days, and the deep roasted coffee beans can be extended to 7 days.

How long can I keep the coffee beans?

Although the roasted coffee beans can be preserved in a cool and dry environment for a year, the flavor substances in the coffee beans can not stay so long! With the reduction of carbon dioxide in coffee beans, the flavor of coffee will slowly slip away due to the lack of carbon dioxide. Generally sealed and preserved in a cool and dry place, it can effectively slow down the slip speed of flavor substances. Qianjie suggests that coffee beans should be finished within 30 days after they are raised and opened, and the flavor of the coffee will only get weaker and weaker.

Some friends will also ask how long the unopened coffee beans will be tasteless. Qianjie through the test found that unopened coffee beans stored in a cool and dry environment for about 50 days still have flavor, but the performance will be more insipid. After about 5 days of opening, the coffee can no longer show any flavor, so it is recommended to buy coffee beans and taste them as soon as possible.

How long can I keep the coffee beans after they are ground into powder?

When coffee is ground into fine particles, as there are more contact surfaces, carbon dioxide will be released faster and coffee flavor will slip faster. Therefore, Qianjie recommends that freshly roasted coffee beans should be finished within 20 days after grinding into powder, and it is best to use a completely sealed jar / bag instead of using the original one-way exhaust valve packaging. If there is no other way of storage, sealing the one-way exhaust valve of the original package with tape can slow down the rate at which carbon dioxide slips away with the flavor of coffee.

How long can I keep the coffee bag?

Hang-ear coffee bag as a pre-ground and independently packaged coffee, drink one packet at a time, the flavor will slip away more slowly than a large bag of coffee powder, but you can't think it will last long just because it's sealed independently. In the past, for the hanging-ear coffee bag in the street, once the fresh coffee beans were ground into particles and sealed independently, the carbon dioxide and flavor would more or less escape, which is equal to the bean-growing time of the coffee bean, so it can be brewed immediately after buying the hanging-ear coffee bag, and there is no need to put it quietly. At the same time, due to the pre-grinding into powder, Qianjie recommends that the hanging-ear coffee bag be finished within 30 days after the baking date.

Can the coffee powder be washed a second time?

Coffee can only be brewed once after it is ground into particles, no matter how it is brewed (including cold soaking and ear hanging). After one brewing, the flavor of the coffee has been released, and then the second brewing is also insipid and has a wooden taste that has a bitter taste (coffee grounds).

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