The water temperature is also one of the factors to adjust the aroma, taste and concentration of coffee when extracting coffee.

The temperature of water

When extracting coffee, water temperature is also one of the factors that adjust the aroma, taste and concentration of coffee, and it is a factor that can not be ignored.

The hotter the water is, the more aroma and taste of the coffee itself can be dissolved. The aroma and taste will become stronger, and the bitterness will also increase. If the water temperature is relatively low, the aroma, taste and bitterness of the coffee will also weaken.

The best extraction water temperature is 90 ~ 96 °C. If the temperature is higher than this, the ingredients (such as caffeine) in the coffee will change due to the high temperature, the coffee will be scalded, the taste of the coffee will become more bitter, and more bad taste will be extracted.

However, it is not necessary to think that the water temperature must be maintained at 90 ~ 96 °C, which is not a rule that must be followed. This is because, if the temperature must be maintained from the beginning of the extraction to the end, the coffee will produce the most good taste while the bad taste of the coffee itself will appear abnormally. So adjust the water temperature of the extraction and extract the coffee you think is delicious.

a. Adjust the temperature of the water according to the extraction time. The extraction time should also be taken into account when determining the water temperature. Generally speaking, the extraction time is short, the use of high water temperature will be more advantageous; when the extraction time is long, the relatively low water temperature will be better. If the extraction time is short, the bad taste or mixed flavor will be extracted for a short time, so the bad taste will not become stronger if soaked in hot water. However, if the extraction time of coffee becomes longer, the time for brewing miscellaneous flavor becomes more abundant, and as the time goes on, it may make the bitterness and wood taste become too strong. Therefore, we should first take into account everyone's favorite taste and extraction time and other factors before determining the water temperature. According to the extraction time, a variety of changes can be made between 80 °C and 96 °C.

b. Adjust the temperature according to the freshness of coffee. If you inject water into the coffee powder, the water will enter the porous structure of the coffee, pushing the gas inside out. Fresh coffee beans are filled with gases formed during baking, so they can be easily extracted even at low temperatures. And at this time, the oil inside the coffee cell has not yet infiltrated into the porous structure formed during baking, so the extraction will be relatively smooth, so it can be extracted at a relatively low temperature (80 ~ 90 °C).

Some friends will say that my coffee has been kept for a long time. Can I extract coffee with a water temperature higher than 96 °C? the answer is yes. This is because the gas inside the coffee, which has been stored for a long time, has naturally been lost, and the oil has seeped into the porous structure, which makes the extraction less smooth, so use a slightly higher temperature.