How to judge whether espresso is good or bad? What is espresso? Starbucks espresso

Professional coffee knowledge exchange more coffee bean information please follow the coffee workshop (Wechat official account cafe_style)

Starbucks coffee is the familiar representative of espresso (or fancy coffee), but can it really represent espresso? Can it be said that the more expensive the coffee, the better the quality? where is the standard for a good cup of espresso? In fact, espresso is not only the American style, latte and cappuccino that we often hear, but also many kinds of changes. A good cup of espresso depends on the quality of espresso extraction. Before we talk about espresso, let's briefly understand what espresso is.

About espresso

What is espresso? This Chinese name is often misunderstood by many people. Perhaps the original text "Espresso" can be used to explain it more clearly. Literally, Espresso is Italian, equivalent to Express in English, meaning fast, click-and-do. Formally, Espresso is coffee made through an Italian coffee machine. Coffee beans after the correct thickness of grinding and the right amount of powder use, through the narrow band of "temperature" and "pressure" two kinds of energy water, through the pressed powder extracted coffee.

Reference conditions for making a perfect Espresso

Atmospheric pressure: 9bar temperature: 90-96 °C time: 20-30s extraction: 30ml powder

The key to good or bad-- Crema

The most fascinating thing about Espresso is the golden foam on its surface. The shape of Crema has almost become the standard for the Italian coffee industry to judge whether a cup of Espresso meets the standard of perfect extraction.

It is a phenomenon that the oil of coffee itself is "emulsified" under temperature and air pressure, and the freshness of coffee beans can also be judged by the amount and color of coffee beans.