One of the most driven coffee professionals I’ve had the honor of meeting is Reza Kosar. In addition to being the first Iranian to become a licensed Q Grader, Reza is a talented coffee roaster with an insatiable curiosity in coffee science. He recently posed an interesting question on his Instagram account: what determines the color of brewed coffee? Which raises a second question, what effect does color have on flavor? We chimed in with what we thought was the right answer, but it turns out Reza had taken a deep dive into the subject and has graciously offered to share his research with us.
The roasting process leads to the formation of the characteristic coffee aroma and dark-colored