Coffee roasting process basic Basically, roasting means transforming coffee beans from raw or green to brown. There are three main stages in roasting processing: Firstly, drying stage. Secondly, browning stage and finally, development stage. Firstly, drying stage Normally, the green or raw coffee has a humidity of 8% to 15%. We need to dry it before the actual roasting starts. Secondly, browning stage At about 160 ⁰C, the coffee starts to smell like toasted bread. This is when the Aroma precursors are starting to convert to ... Read more