Basically, if you are happy, any bean can be used to make espresso. However, the high-pressure practice of espresso will emphasize the characteristics of beans, so sour beans are super sour and bitter is even more bitter. Therefore, we often have to mix different beans to make espresso. In every coffee shop, there is usually a recipe for espresso, but the formula is different and the baking depth is different. You have to choose what you like better.
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