Espresso is a method of brewing coffee.

"Espresso" is an Italian word that means "on the spur of the mome nt" and "for you" (cooked right away for you).

What is Espresso? If you ask, you will get many different answers. Indeed, after 100 years of development, Espresso has become a kind of life and art.

Espresso is a method of brewing coffee.

Espresso is a way to use technology to make coffee. According to the definition of "Espresso Coffee The Chemistry of Quality", it must meet the following conditions:

The amount of coffee powder (one cup)

6.5 ±1.5 grams

Temperature of water (℃)

90 °±5 °

The pressure of water

9 ±2 atmospheric pressure (bar)

Filter time

30 ±5 seconds

Temperature of water:

If the water temperature is too low, it will cause insufficient extraction, and the substances inside the coffee can not be fully released, so that you can only cook a cup of Espresso; with insufficient flavor and sour taste. Once the water temperature is too high, excessive extraction will make the coffee bitter and astringent.

Pressure of water:

The general hot water brewing method can only extract substances that can burn in water inside the coffee, while Espresso can further extract substances that are insoluble in water by high pressure. These high pressures will completely emulsify the lipids (Lipophilic Substances) inside the coffee and dissolve into the water, which is the main source of "mellow taste" (body).

P.S.: emulsification will make Espresso taste thicker, making people drink "as smooth as velvet"; and because stickiness will form a lower surface tension, it can invade the taste buds and make mellow reverberate in the mouth for a long time.

Filtering time:

The length of filtration time will affect the amount of water output. Espresso uses high-pressure hot water to extract the flavor of coffee, which takes about 25 seconds to complete the task (after this time, the liquid is tasteless and will only dilute Espresso). After the timeout, some people continue to let it out of the water and fill a cup to form a "Americano" or "Lungo", which tastes like carbon-roasted coffee.