As a true coffee lover, I believe coffee roasts are among the most misunderstood concepts in the world of coffee. I enjoy all roasts of coffee, though dark roast is my ultimate favorite. In conversations with various people over the years, I’ve found that many coffee drinkers do not truly understand what sets roast apart beyond visual differences.
Beyond the darker appearance of the coffee beans, a deeper comparison of dark roast vs. medium roast coffee is needed to appreciate and differentiate these coffee roasts. To get the scoop on the differences in flavor, acidity, and strength between dark roast vs. medium coffee, I chatted with Robert Bargas, Co-Founder of Headcount Coffee.
Roast levels of dark roast vs. medium roast coffee
“While roast levels change from roaster to roaster, there is some commonality,” says Bargas. “A roast level from us will not be the same as a roast from the next roaster, even if we both say it is a “Medium” or a “dark”. But, a medium roast is easier on the bean, it preserves more of the bean’s origin character and notes that the “Q” grader mentions about it. That means you taste the natural flavor notes the farm produced, whether that’s fruit, nuts, florals, or cocoa,” Bargas shares.
Flavor based on roast profile
“Roasting is all about controlling heat, air flow, and the overall process to guide flavor. In a medium roast, heat development is timed so the bean’s natural acidity, sweetness, and aromatics stay intact. A medium roast is really about balance,” says Bargas. In contrast, a dark roast coffee is roasted past the first crack and into the second crack, which develops the sugars and gives them time to continue caramelizing, allowing the acids to mellow. “This is also the development stage of the cocoa and smoky flavors that so many love and call ‘strong’ coffee,” he says.
“The extended roasting creates a fuller-bodied, richer cup with smoky or chocolate-forward notes. The roast level is essentially a flavor decision, not a quality decision, and both require precision to get right. The same bean, roasted each way, will provide completely different experiences. I know we are not talking light roasts, but when you add that in, you really get the entire flavor profile that a bean can produce.”
Sheen and oilness
Medium roast beans usually have a dry surface and a lighter brown color because the oils stay inside the bean during roasting. In contrast, a dark roast bean will often look shiny because the longer roast, the second crack, pulls the oils out to the surface. The oils will continue to coat the surface after the beans have dropped and cooled down. That sheen is completely natural and can be seen if you examine the beans before brewing.
Which is stronger?
“Strength is one of the most misunderstood parts of coffee. People think “darker” means “stronger,” but real strength actually comes from your brew ratio, not the roast level,” says Bargas. “A dark roast tastes bolder, smokier, and usually carries more chocolate or caramelized notes. Some of that intensity comes from the sugars and fibers breaking down in the bean as the roast pushes deeper into development, especially past second crack. But in terms of actual strength in the cup, a medium roast can hit just as hard depending on how you brew it. Flavor intensity and strength are not the same thing, and they shouldn’t be mixed up,” he shares.
Along with misconceptions surrouding coffee strength comes questions about the caffeine content in each roast of coffee. “One of the biggest myths in coffee, dark does not mean strong and caffeine doesn’t burn off as the roast levels rise. The difference between a medium and a dark roast is so small that your body will never notice it.” Overall, if you’re looking for more caffeine, you’ll need to drink either a greater volume of coffee or drink a coffee that has robusta beans blended in (or 100% robusta) for more caffeine per cup.
Dark roast vs. medium roast coffee misconceptions
According to Bargas, the biggest misconception in comparing dark roast vs. medium coffee is that dark roast is always stronger and has more caffeine. Additionally, it’s a misconcept that should be dark and also bitter on the back end.
“This is why people add so much sugar or cream into coffee. They just haven’t experienced good quality coffee yet. A good dark roast can be smooth, sweet, lots of natural flavor and incredibly balanced. On the flip side, people think medium roasts are weak or too light. We typically hear them say they don’t want to “see through the coffee pot”. But medium roasts often deliver the most complex and expressive flavors. But people all have personal preferences, and both roast levels can shine when the bean and the roast match each other,” he shares.
