Coffee review

Roasting is the "key" coffee base in coffee processing

Published: 2026-04-05 Author: World Gafei
Last Updated: 2026/04/05, The components of coffee quality (such as the quality and magnitude of acidity and bitterness, the intensity and quality of aroma) are determined at the green bean stage. Although roasting can only adjust the taste within the range of characteristics possessed by green beans, roasting has a far greater impact on coffee taste than grinding and extraction, which transfer the active ingredients produced after roasting into the coffee liquid and create flavor.

The components of coffee quality (such as the quality and range of acidity and bitterness of coffee, the intensity and quality of aroma) are determined at the raw bean stage, although roasting can only adjust the taste within the range of characteristics of raw beans, but roasting has a greater impact on the taste of coffee than grinding and extraction, grinding and extraction is to transfer the roasted active ingredients to the coffee liquid, which has nothing to do with creating flavor.

During the roasting process, coffee bean cells mutate and carbohydrates, amino acids, proteins, lipids and minerals react. At 185240 ℃, sugars combine with amino acids, vitamin C and proteins for caramelization, which is the so-called "Mena reaction". The final product is yellowish brown, bitter sweet glycosylamine and melanin-like pigments. Thus giving more aroma to the coffee and ripe beans. The aroma of raw coffee beans contains about 250 different volatile molecules, while after roasting, as many as 800 volatile molecules can be found in coffee beans. Therefore, roasting is the most important link in coffee processing.

FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。

Important Notice :

前街咖啡 FrontStreet Coffee has moved to new addredd:

FrontStreet Coffee Address: 315,Donghua East Road,GuangZhou

Tel:020 38364473

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