The Myth of the Roast Profile: A Perspective from the Fire
I am Pak Kopi, and this is Coffee University. Today, we are addressing a term frequently thrown around in the coffee industry: the roast profile. In this video, we will explore what a roast profile actually is, why many professionals view it as a marketing gimmick, and whether it truly matters for the quality of your cup.
Defining the Roast Profile
On paper, a roast profile is defined as a graph or data set that tracks the changing temperature of a coffee bean throughout the roasting process. Commercial roasters often utilize computerized machines to meticulously record these temperature fluctuations, aiming for perfect replication. However, the prevailing opinion in this circle is that this level of precision is “overkill.”
The reality of roasting is far more elemental. Much like making popcorn, the process is intuitive rather than computational. You simply watch the bean until it develops the desired color and hear the “first crack” indicating the completion of the development stage. Once those visual and auditory cues are met, the roast is done.
Does Temperature Control Matter?
The technical definition of a roast profile involves increasing the temperature to reach the first crack and then decreasing or holding the temperature to allow the bean to develop. The question remains: does this specific curve matter?
Based on over a decade of experience—spanning eight to ten years working with various roasting machines—from massive commercial industrial units to small sample roasters and custom-built commercial machines—the answer is nuanced. There is no discernible difference in the final product based solely on whether the temperature was increased or decreased during the roast.
The Variables Beyond the Machine
Even if you attempt to duplicate the exact computerized model of a roast profile for a specific green bean from the same origin, you will inevitably get different results. This is not due to a flaw in the machine, but rather the influence of outer conditions:
- Ambient Temperature: The heat of the room affects the roast.
- Weather: Humidity and external air pressure play a role.
- Barometric Pressure: Changes in atmospheric pressure alter how the bean expands and cooks.
Because these environmental factors fluctuate constantly, two roasts started with identical settings will never be chemically identical. Therefore, obsessing over a rigid roast profile ignores the dynamic nature of the environment in which the coffee is being roasted.
Roasting is Simple
In the commercial coffee industry, there is a tendency to glorify the craft and overcomplicate simple processes. By emphasizing complex roast profiles, companies may inadvertently create a barrier to entry or imply a level of necessity that doesn’t exist.
At the end of the day, roasting coffee is simple. It is an art form that relies on observation and experience rather than just data. Whether you are using a high-tech computerized roaster or a basic setup, the goal remains the same: achieve the perfect color and flavor development.
Conclusion
After years of experimenting with different machines and profiles, the conclusion is clear: the roast profile does not really matter as much as the industry might lead you to believe. The focus should remain on the sensory cues of the roast—the crack, the color, and the aroma—rather than getting lost in the minutiae of temperature graphs.
This brings us to the end of this episode of Coffee University. You have earned one credit for watching this video. Thank you for joining me, I am Pak Kopi. See you again next time.
