How to buy fresh coffee beans? Frequently asked questions on the purchase and daily preservation of coffee beans

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Coffee is a kind of agricultural products, and "fresh" is one of the indispensable elements of good coffee.

So how to choose and buy fresh coffee, and the problem often encountered by guests is how to preserve it, it has become a very important part. In this article, we would like to explain some of the problems you have encountered in purchase and daily preservation.

How to buy fresh coffee beans?

In addition to the merchant's quality control of raw coffee beans (see defective beans), another important thing is the coffee "baking date". Raw beans can be preserved for half a year or more in a dry and low temperature environment. However, when the coffee is roasted at more than 200 °C, the internal structure changes and becomes loose, which will greatly reduce the preservation time. Generally speaking, the peak of coffee flavor is about 2 weeks after baking (there will be a slight difference depending on the baking degree), and it is perfect to drink within 1.5 months after the baking date, so we strongly recommend that friends finish it as much as possible within two months after the baking date. If stored for three months, although it will not be spoiled, but the flavor will be significantly reduced.

So, just like buying milk, it is the best way for people to find the latest production date to buy it. And in the fresh period of cooking, let him show you the best side.

What is bean cultivation? when is the best time to taste it?

The roasting of coffee beans, like stir-frying, is accompanied by many chemical reactions, dehydration, bonding, Acid, alcohols, Alcohol esters (Ester) and the formation of aromatic substances. After baking, coffee beans will not only continue to emit CO2 (sometimes you will find that coffee bags will bulge because coffee beans continue to exhale), but also continue to react and release organic matter inside, so immediately after baking, you will not get the most complete coffee flavor. We suggest that you should not open the coffee and leave it in a dry and cool place for 5-7 days before tasting, so that the coffee beans are ripe. That is, we often hear about "raising beans". After raising beans, the coffee will be more hierarchical, cleaner and richer in flavor. Of course, if you can't wait to taste it immediately, it's also interesting to observe the changes in the flavor of coffee every day.

Should the preservation method and environment be kept in the refrigerator?

It is our most recommended way to store coffee in a bag that is necessary and unilluminated by an one-way breathable valve and stored in a cool and ventilated place at room temperature. After picking up the coffee beans, be sure to seal the coffee seal.

Friends often ask the housekeeper if it is better to put it in the refrigerator after buying it. The housekeeper's own habits are not stored in the refrigerator. Coffee beans are quite afraid of dampness. when coffee packaging is taken out of the refrigerator at room temperature, it is easy to accumulate moisture, causing coffee to lose its flavor due to moisture, and iced coffee beans will lower the brewing temperature. it is not easy to fully release the flavor of coffee in brewing. If you really like to put the coffee beans in the refrigerator, be sure to pay attention to the dampness, put the coffee beans at room temperature, then take them out of the bag, and start cooking.

Grinding

After the coffee beans are ground into powder, the surface area will increase more than a thousand times, and the chance of contact with air will be greatly improved. therefore, re-grinding before cooking is the best way. do not grind the whole bag of coffee beans at once and take them again and again. Coffee beans begin to come into contact with the air as soon as they are ground, and brewing immediately after grinding is an important way to preserve the flavor of coffee. Many stores provide valet grinding service, but we still suggest that friends try to have a simple bean grinder at home, which will enhance the flavor.