Can coffee powder be brewed directly? How many times can I soak the coffee powder? How do you drink the coffee powder?

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Coffee is different from tea, it is a seed. Its density is much higher than that of tea, so it cannot be eaten directly, and it needs to be baked at high temperature, which is actually puffing, because only the lignocellulosic structure of extruded coffee beans can be opened. Aromatic substances remain in the crispy roasted (expanded) coffee beans, the size of coffee beans increase, density becomes smaller, this process is necessary, otherwise we will not be able to get the taste of coffee.

After roasting, coffee needs to be crushed. The purpose of crushing is to increase the contact area between hot water and coffee powder, so that more aromatic substances will be extracted. This phenomenon is called improving the extraction rate, so the whole coffee bean can not be completely extracted from the taste of coffee, so the coffee bean can not be boiled directly.

The next step is to use water to extract the taste of coffee from the coffee powder, and Jiner also has the color of coffee. So we have to drink a cup of coffee, coffee beans need to go through: puffing-crushing-extraction, can be obtained, so coffee needs to be "boiled".

Can coffee be "brewed"?

If we define "boiling" as heating water to 100 degrees and keeping it at that temperature for a long time, then coffee cannot be brewed. Because the source of flavor in coffee (aromatic oil) will be destroyed in the process of "boiling" at high temperature for a long time, so about 92 degrees Celsius is the ideal temperature for coffee extraction. So whether you are soaking (French presser), using a coffee machine, or siphon pot and other utensils, the water temperature of extracted coffee can not be higher than 96 degrees Celsius, so coffee can not be brewed in this sense. In this way, in the production of filtered coffee, we can clearly see that the coffee should be brewed rather than boiled like porridge as we thought. We use a variety of heat sources to heat only the water used to extract coffee, rather than directly boiling the mixture of boiling water and coffee powder.

Freshly ground coffee can be "brewed" several times

Many friends often complain that coffee is more expensive than tea, because tea can be brewed repeatedly, but coffee can only be brewed once. There are also some friends who do not give up and extract the coffee many times. We say that this coffee can only be extracted once, but the coffee brewed after the first time can no longer be called coffee. Because there is a lot of caffeine in the brown water, or some scorched substances. We call this brown water Dirty Water (dirty water). In fact, the standard method of drinking black tea in the West is only soaked once.