To measure let’s say 30 grams of both beans, you need more beans from the dark roast. Therefore, blonde roast beans are heavier and denser but smaller-sized than dark roast coffee beans. The beans lose their density and sweetness and expand in volume as the roast temperature increases. However, other chemical and physical aspects of the bean undergo significant changes throughout the roasting process. The reduction in the caffeine content from a light roast to a dark roast is quite small. Studies have shown that caffeine degrades marginally during roasting. Moreover, blonde roast coffee beans are denser and heavier than the darker beans hence for the same grams of coffee, you need more of the darker beans which cancels out the slight difference in the caffeine content. Only a tiny fraction of caffeine is lost during roasting. The reason for the slight difference between the caffeine content in blonde roast coffee and dark roasts is that caffeine is fairly stable and withstands heat during roasting. For example, a shot of Starbucks’ blonde espresso has 10 mg more caffeine than a regular espresso shot. Yes, blonde roast has slightly more caffeine than darker roasts but unless you are consuming several cups of blonde roast coffee the caffeine difference for a single cup is insignificant. This page discusses what is blonde roast coffee, how to make espresso with blonde roast coffee, and the strength and caffeine content of blonde coffee as compared to darker roasts. Consequently, there is an unending debate about the caffeine level in lighter roasts as compared to dark roasts. Caffeine is probably the most stable compound in coffee as it takes extremely high temperatures to break it down.ĭuring roasting, coffee beans are subjected to varying temperatures to achieve the various roast profiles with dark roasts facing higher temperatures than lighter roasts.
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