Just started to learn coffee | what details should I pay attention to when extracting a cup of coffee?

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① chooses ripe beans with good quality. The applicability of hand-brewed coffee is very strong, deep-roasted Italian beans can also be used for hand-brewing, but if you really want to drink the charm of hand-made coffee, it is recommended to choose high-quality beans with a cup test score of more than 80 points. There are detailed beans resume (origin, variety, treatment, etc.), have a certain flavor characteristics.

② chooses freshly baked cooked beans. The higher the quality of coffee, the more emphasis should be placed on the concept of fresh roasting. Because once the raw coffee beans are roasted into ripe beans, the coffee flavor is always in a state of decreasing, first aroma substances, then good flavor substances, which will escape with the emission of carbon dioxide. Of course, we have all heard the concept of "raising beans". Freshly roasted beans take three to five days before the overall flavor shows the best state, and then this best state lasts about 7-10 days. After that, the coffee flavor will decline even more, and then drink it a month later, then the flavor will be much more insipid.

③ hand punching pot is one of the key instruments for hand flushing. Different structures, different materials and different spout designs will affect the flow size and stability of water injection. And now popular temperature control kettle (electric heating and precise control of water temperature), so that the hand punching process can be more stable.

The importance of ④ grinding degree is that it affects the concentration and extraction rate of coffee, and the obvious change in taste is the change of alcohol thickness. Under the same conditions (the same ratio of powder to water, the same water temperature, the same water injection mode, the same brewing time), the finely ground coffee has high concentration, high extraction rate and high alcohol thickness; the coarse ground coffee has low concentration, low extraction rate and low alcohol thickness.

⑤ for beginners, to practice the basic skills of water flow, first master a stable flow, is a more correct way, practice, please practice in front of the coffee, do not practice "circle" in front of the empty filter cup, coffee beans have resistance, carefully observe the color of the coffee liquid surface changes, and the level of water level, to determine the next step of water injection.