Do I need to roast the coffee beans I buy?

Coffee beans are the basic raw material for making coffee, but before they can be turned into a delicious drink, they need to go through a roasting process. Roasting is to heat the raw beans to a certain temperature so that the internal moisture evaporates, the color changes, and the unique aroma and flavor are released.

First of all, roasting can improve the taste of coffee beans. Raw beans contain high moisture and acidic substances, and it is difficult to achieve the ideal taste before they are processed. By properly controlling the temperature and time for roasting, the moisture inside the coffee beans can be completely evaporated, and the acidic substances can be converted into softer and richer flavor substances.

Secondly, roasting can also adjust the color of coffee beans. Green beans are usually dark green or light yellow, and after high temperature treatment, they will produce various shades of brown. These color changes not only affect the visual perception of coffee quality and taste, but also reflect changes in internal chemical composition.

In addition, by properly controlling the temperature and time, roasting can also make the coffee beans release their unique aroma. During the roasting process, the volatile compounds inside the coffee beans will gradually be activated and emit a variety of different aromas. These aromas are an important part of the complexity of coffee flavor.

Finally, roasting can also extend the shelf life of coffee beans. Green beans contain high moisture and easily oxidizable substances, and are easily affected by mold, insect pests, etc. and deteriorate during storage. By heating them to a certain temperature, bacteria, mold and other microorganisms can be effectively killed, and the moisture content can be reduced and oxidation reactions can be inhibited.

In summary, roasting coffee beans is a necessary and important step. By controlling the temperature and time, you can improve the taste, adjust the color, release the aroma and extend the shelf life. Only properly processed coffee beans can show their best flavor and quality.