How to choose the coffee temperature? Water temperature is an influential factor in making coffee by hand

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Water temperature is closely related to brewing and extraction. It not only affects the extraction degree, but also affects the extraction quality. In theory, in the whole process of brewing and extraction, the hot water temperature in contact with coffee powder should be kept at 91 ℃-94 ℃, that is, the so-called optimum extraction water temperature (The Best Water Temperature Throughout Extraction).

If it is below this temperature range, the coffee will show a more sour taste; above this range, it will show a more obvious bitter taste, which means that the most appropriate extraction water temperature should be lower than the boiling point of 100 ℃, that is, the word "brewing coffee" is actually a wrong term in the professional system of coffee-good coffee can not be brewed.

Of course, the optimum extraction water temperature is only an ideal range, and other factors still need to be taken into account in practice. For example, if the coffee beans are roasted deeply, the temperature should be low; if the coffee beans are lightly roasted, the best temperature should be close to the upper limit, or even slightly higher than 94 ℃. The optimum temperature of coffee after extraction should be about 85 ℃, which is called "the best temperature in the cup". The brand name of 85 ℃, a coffee shop chain, is derived from this.

No matter which way the hot coffee is brewed, it should be drunk while it is hot. Because with the rapid drop in temperature, sour and miscellaneous tastes will emerge in large quantities. Especially for a coffee shop, even if the "best temperature in the cup" is reached, the coffee needs to be served to the guest's table as soon as possible, and the best temperature for guests to pick up the coffee should be 65 ℃, which is called "the best drinking temperature" or "the best lip-touching temperature". In my daily life or at work, I personally make coffee for my friends, and I always feel anxious when I see that my friends are reluctant to finish it quickly.

In addition, when drinking coffee in a cafe, it is always embarrassing if the cup is empty, and most cafes still lack a considerate "refill plan", so many customers have to shyly leave a little coffee in the cup and let it cool slowly. This is undoubtedly a big taboo for tasting coffee. After drinking a cup of hot coffee, the temperature of the last sip of coffee should not be lower than 40 ℃, which is the "best end temperature" or "best buying temperature".