How long does it take to make a cup of coffee? How long does it take to make coffee?

It is not difficult to make a good cup of coffee by hand. What is difficult is the understanding of the brewing data. The more frequently asked questions are "how fine the coffee powder is ground", "the way it tastes good", "whether I am making it at the right time".

In view of the degree of grinding, cooking methods, Qianjie has been a lot of popularity (you can search in the Qianjie official account search bar), although Qianjie has also talked about the issue of cooking time, but this time to a bit more in-depth discussion.

What is the better time to cook by hand? If you simply want to know whether you are brewing coffee at the right time, Qianjie gives a direct conclusion here. Based on the amount of 15g powder in filter cup 01, the overall time is controlled within 1 minute 50 seconds-2 minutes 30 seconds, which is a better range of brewing time. What we usually call brewing coffee, in professional terms, is coffee extraction, that is, using hot water as a carrier to dissolve the flavor substances in coffee powder, this process takes time. Usually, the longer the extraction time, the more coffee substances are extracted. But the substances that coffee can dissolve are not all good. So it is necessary to control the extraction time.

Generally, when the coffee is filtered for about 2 minutes, the soluble matter is quickly released from the coffee powder, and the extraction rate can reach 18% (18-22% is considered to be a better extraction range within the gold cup criterion); more than 80% of the soluble matter will be dissolved after 5 minutes. (that is, more than 24% of coffee beans) to put it another way, for example, when we use the normal brewing mode, the extraction time of coffee is much earlier than 2 minutes, then the coffee may be insufficient, light and watery, while the extraction time is much longer than 2 minutes. The bitter taste of scorch caused by excessive extraction may occur.

So if you control the extraction time between 1 minute 50 seconds and 2 minutes 30 seconds, the flavor of the coffee will be better. If we want to skillfully grasp the flavor of coffee, we need to understand at least several factors that can affect time. Calculation of ① steaming time. The extraction time refers to the time taken from the moment the hot water touches the coffee until the coffee liquid in the filter cup is dripped. So you should press the timing button at the beginning of steaming water injection, and some friends like to press the timing button after steaming water injection. Obviously, the error will increase.

Another point is that the length of steaming time will also have an impact on the final extraction time. Qianjie is calculating the time range of 1 minute 50 seconds to 2 minutes 30 seconds, which is based on the steaming time of 30 seconds. If you extend or shorten the steaming time properly, the final extraction time will be prolonged or shortened accordingly. The thickness of ② grinding. This is easy to understand, coarse coffee powder, water is easy to pass, then the time required will be short, fine coffee powder cracks will be less, the water will not be so easy to pass, and even there will be blockage, then the time required will be long. However, it is important to note that not all coffee beans have the same grinding scale, and it is best to calibrate them with a sieve of 20. The grinding degree of hand-brewed coffee is 75-80% thick. ③ filter cup and manipulation. We often hear that using Kono filter cups can make coffee more mellow; using XX techniques can make coffee taste better. Part of the reason is that the extraction time is artificially extended / shortened. "because you are afraid that the deep-roasted coffee will dissolve into bitterness, the grinding will be a little thicker." if it is thickened, the coffee will enter the water quickly and the taste will be thin. "in order to make the deep-roasted coffee not too thin, use the kono filter cup and soak it for a long time." this sounds a bit superfluous. But in fact, it contains scientific extraction knowledge.

High water temperature, fine grinding, the unit extraction efficiency is high (the matter dissolved in each second is a high value), it is easy to extract the bitter molecules in the latter section, so it is necessary to rough grinding, so that the dissolved substance will be reduced every second, but the coarse coffee powder will also cause the coffee to enter the water quickly, so the taste caused by insufficient time is thin. On the other hand, we can use the filter cup with relatively full flow rate or artificially prolong its extraction time by means of flushing and boiling (segmented water injection) to control the extraction time we want. "the more and longer the filter cup, the faster the launching speed, on the contrary, the fewer and shorter the diversion groove, the slower the launching speed; the more the number of stages, the longer the extraction time, the less the number of stages, the shorter the extraction time. "