The amount of coffee beans in an espresso varies according to personal taste and preparation method. In an espresso machine, the consumption of coffee beans is generally more than 7 grams and less than 10 gram.
Generally speaking, espresso needs to be made by espresso machine. After high temperature and high pressure water, coffee is extracted from coffee bean powder, and finally a cup of espresso with strong flavor is made. But it can also be fine-tuned according to personal taste.