Hand-brewed Coffee course-Water temperature the relationship between hand-brewing time and water temperature

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Hand brewed coffee steaming and water injection methods Hand brewed coffee water temperature and powder water ratio data

When brewing coffee, I am often asked how much water to brew?

The temperature range usually recommended for hand flushing is 80 degrees--90 degrees. Is that "a few degrees"?

We actually tested existing coffee, using water temperatures of 93 ° C, 88 ° C and 83 ° C, brewing light medium roast, medium roast and deep roast coffee beans, light medium roast coffee beans at 88 ° C flavor performance is most obvious and complete; medium roast coffee beans at 88 ° C sweet feeling outstanding; deep roast coffee at 93 ° C taste clean and bright.

Generally speaking, it is recommended that deep-roasted coffee be brewed with low water temperature as much as possible, while light-roasted coffee be brewed with high water temperature. On the one hand, the cell wall structure of light-roasted coffee beans is more complete than that of deep-roasted coffee. High water temperature can make light-roasted coffee extraction more efficient and evenly bring out pleasant substances of coffee beans. Low-temperature brewing of deep-roasted coffee can also avoid high temperature dissolution of uncomfortable substances, such as burnt bitterness, etc.

However, this experiment found that deep-roasted coffee performed best at 93 degrees Celsius, with bitter and smoky roast flavors evident at 88 degrees Celsius and mellow and soft at 83 degrees Celsius. Why is high water temperature feasible here?

After discussion among colleagues, it is inferred that because of the high extraction efficiency of coffee brewed at high water temperature, the acid in coffee beans is also highlighted relatively. Under the condition of no over-extraction, the bright acid and the flavor of the middle and early stages avoid the smoky taste and burnt bitterness that are easy to appear in deep roast coffee.

Of course, the premise of our experiment is to use the coffee beans of choice, use the same water quality in each cup, and reduce the variation to only the temperature difference of water. If we want to talk about the hardness of water quality and different roasting methods, it is another world.

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