What's the difference between mixed coffee beans and single beans? Why is the espresso mixed?

The essence of coffee beans is agricultural products, the so-called agricultural products, then there will be some flavor differences because of different regions and years. Another meaning of high-quality coffee is individual coffee, that is, coffee beans from the same producing area have obvious regional characteristics, such as the taste of Ethiopian beans and Panamanian beans, which is the influence of local conditions. Therefore, when drinking hand-made coffee, you tend to choose coffee from a single producing area.

So, why should there be blended coffee? there are generally two reasons. the first is to learn from each other after being familiar with the regional characteristics of different coffee beans. For example, the sunflowers in Qianjie Coffee are based on thick chocolate, and then add a little bit of acidity and texture from Ethiopia. This is to learn from each other and produce a better flavor. Another way of matching, especially Italian, is to form a relatively stable formula through the combination of several beans, so that even if the coffee beans in a producing area have changed, it will not change so much that the flavor of the latte has changed.