Can unroasted coffee beans be brewed into coffee?

Coffee is a popular drink, and coffee beans are an important raw material for making coffee. Usually, we use roasted coffee beans to brew a strong and mellow coffee. However, some people may wonder whether it is possible to make delicious coffee using unroasted coffee beans.

First, let's understand what roasting means for coffee beans. Roasting is to change the characteristics of fresh coffee beans, such as long storage period, high water content, light color, less obvious smell and poor taste, into good flavor and aroma characteristics, and extend their shelf life. In this process, untreated or incompletely treated (i.e. "raw") raw beans are exposed to high temperatures and chemically react through contact with air.

Therefore, before being processed or only partially processed, the unprocessed or semi-processed coffee beans cannot be directly brewed into delicious cups of coffee with various characteristics. Unprocessed coffee beans may show some undesirable characteristics when brewed, such as high acidity and bitter taste. In addition, since they have not been processed, there may still be some impurities or foreign smells in these beans.