Let me give you some knowledge of espresso about espresso.

Espresso means espresso. The coffee beans used are mixed and heavily roasted beans. However, let me give you a little hint that the really top-notch coffee beans will not be used to match espresso, because overbaking will seriously damage its original flavor.

There are probably several standards for a cup of espresso. I copied them from the Internet. People like me who can't remember my home phone can't remember these rules.

The weight of coffee powder (one cup) 6.5 ±1.58g

1 temperature of water (℃) 90 °±5 °

2 pressure of water 9 ±2 atmospheric pressure (bar)

3 filtering time 30 ±5 seconds

These are the key elements of a cup of espresso. Most professional cafes use semi-automatic coffee machines. In the production process, in addition to the machines, coffee beans, water and other hardware conditions, the most critical step is to press pressed powder. The importance of pressing powder is self-evident, if the pressure is too tight, there will be insufficient extraction, if the pressure is too light, there will be insufficient extraction, if the pressure is uneven, it will appear, the cream layer will be uneven, and affect the taste.

How to say, I once encountered such a misunderstanding, that is, the thicker the cream layer, the better the quality of espresso. In fact, the cream layer only represents the freshness of the coffee, not the taste of the coffee. Generally speaking, the cream layer of Arabica beans is general, but the taste is excellent, while the cream layer of Robusta beans is very thick, but the taste is astringent. The famous coffee brand illy's espresso beans are all Arabica beans, so although the cream layer is not very thick, it tastes very smooth.

What is a perfect espresso? Everyone has different tastes, so everyone's feelings are different. But visually, first of all, there should be a reddish-brown cream, and the cream should be highly viscous. Secondly, the effect of hanging the cup after drinking is also very important, the whole coffee cup wall should have a thin layer of cream. As for the taste, I personally prefer espresso with a more sour taste, so, so far, the espresso beans of Bei Fei are the best I have ever encountered. There are also Euro in China, and the four Seasons workshops are very much to my taste. As for illy, due to the inconvenience of transportation, although the grade is very high and the quality is very good, it is estimated that the freshness we can drink can reach 7%. This is a pity. Even in the United States, illy's espresso coffee beans are a luxury in the eyes of coffee lovers.

Espresso is the bitterest coffee in the world, but brave people can still find fun in it. Good espresso can give people a velvet-like smooth taste, its sweet can stay in the throat for a long time, endless aftertaste.

Real experienced baristas, in the extraction time of no more than 25 seconds, more than 25 seconds, the liquid is not very tasty, espresso will become Americano. During the extraction process, experienced baristas will let the liquid fall into the cup as evenly as possible. If friends are watching and find that one side of the coffee flows like a child to pee and the other opens the gate like Xiaolangdi, please ask the barista to make a new cup for you.

Espresso is an art of comprehensive coffee, its formula is endless, it is also a way of life, you can enjoy a wonderful process in three mouthfuls. So, when most American coffee items are not to my taste, I can always find my cup of espresso.