Introduction:Many people assume that single-origin espresso (SOE) is synonymous with specialty coffee, but in reality, its flavor profile is significantly influenced by the characteristics of the coffee crop and the brewing method. This article uses the Yellow Bourbon from Fazenda Rainha in Brazil as an example, comparing pour over and espresso brewing methods to reveal the flavor differences of single-origin beans under different extraction conditions. It also analyzes why some single-origin beans are not well-suited for espresso, while sharing the role and characteristics of Brazilian beans in blends.
Does SOE (single-origin espresso) necessarily equate to premium, delicious coffee? The answer is not absolute. As an agricultural product, coffee's flavor fluctuates each year with terroir and climate conditions. Furthermore, different brewing methods can markedly affect the final taste and aroma. This time, we used Yellow Bourbon coffee beans grown at Fazenda Rainha in Brazil’s Mogiana region, cultivated at altitudes between 1400 and 1950 meters, as our sample. We conducted a comparative experiment using both pour over and espresso brewing methods to observe how the beans perform under different extraction techniques.
For the pour over test, we used a Kono dripper with a water temperature set at 88°C, a brew ratio of 1:15, 15 grams of coffee grounds, and a grind size roughly equivalent to 70% passing through a standard #20 sieve—similar in coarseness to granulated white sugar. Water was added in three pours: the first 30 grams for a 30-second bloom, followed by pouring up to approximately 125 grams. When the liquid level dropped halfway, we added more water to reach a total of 225 grams. The entire extraction process took around 2 minutes and 10 seconds. The result showed that this pour over version of Yellow Bourbon exhibited a natural sweetness akin to sugarcane juice, paired with an black tea-like base, soft fruity sweetness, clear notes of nuts and chocolate, balanced and smooth acidity, mild and clean bitterness, and an overall round, layered mouthfeel.
In the espresso test, we used an espresso machine with a water temperature of 94°C, a pressure of 10 bar, 20 grams of coffee grounds, ground to an extremely fine consistency, and an extraction time of about 25 seconds. However, the performance of this SOE version fell short of expectations—it had a strong roasted peanut aroma, but subtly carried an astringent note reminiscent of peanut skins. The overall mouthfeel was loose and lacked body, with noticeably thin richness and a rather one-dimensional flavor profile, forming a stark contrast with the pour over version.
This demonstrates that not every single-origin bean is suitable for making espresso. Particularly under high-temperature and high-pressure extraction conditions, if the bean itself has certain flavor flaws or the extraction parameters are not optimized, its negative traits can be more easily magnified. In comparison, pour over brewing—thanks to lower water temperature and larger brew ratios—tends to better highlight the coffee bean’s inherent balance and delicate characteristics.
It’s worth noting that Brazilian Yellow Bourbon, grown at high altitudes, often exhibits bright notes of nuts and chocolate, with soft and clean acidity, light bitterness, and an overall impression that is refreshing and vibrant. To enhance these qualities, the sample used in this experiment was roasted to a medium-dark level. Cupping results revealed intense chocolate aromas, accompanied by nutty flavors and a natural sweetness reminiscent of cane sugar. The cup was smooth on entry with rich layers of flavor.
The experimental results also remind us that SOE is not inherently synonymous with premium coffee, nor does it guarantee superiority over traditional blend espresso. While the charm of specialty coffee lies in showcasing the unique terroir of its origin, the match between brewing methods and bean characteristics is equally crucial. For certain single-origin beans, blending may actually bring out a more stable and richer expression.
In fact, Brazilian beans—with their signature nutty and caramel profiles—have long been an indispensable foundational element in Italian-style blends. This stable and layered base pairs well with beans from other regions, creating more diverse and balanced flavor combinations.
Combining hands-on testing and market experience, the performance of the Yellow Bourbon from Fazenda Rainha in Brazil once again proves that understanding the origin characteristics, growing altitude, processing method, and suitable brewing approach of coffee beans is key to achieving an ideal flavor. Whether you choose pour over or espresso, selecting the right method is essential to truly appreciating the unique charm of a single-origin bean.
The above content is compiled by CoffeeHunters, a coffee news website.
