How Do Robusta Coffee Beans Differ from Arabica?
Robusta coffee covers the Canephora species, the second most cultivated coffee type after Arabica. Its flavor reads rough and grain-like, often with wheat, cereal and sometimes a pungent note, which is why it rarely appears in specialty cafés and is mostly used in commercial blends and instant coffee. It also carries more caffeine and chlorogenic acid than Arabica.
Those higher levels of caffeine and chlorogenic acid, together with Robusta's sturdy plants and heavier yields, explain its firm place in Italian espresso blends, where it adds body and crema. It is also used in hybrid breeding with Arabica to pass on resistance. Judging a coffee bean by variety alone misses how roast and origin shape the cup.
In the specialty coffee wave, Arabica has almost become synonymous with high-quality coffee, while Robusta is often labeled as commercial beans or instant coffee. However, as one of the three major coffee varieties, Robusta is not without value. Front Street Coffee will take you to reacquaint yourself with Robusta: why its flavor is rough, why its caffeine and chlorogenic acid content are relatively high, and why it holds an unshakable position in Italian blends. This article provides a comprehensive analysis of the differences between Robusta and Arabica, from variety classification, flavor formation, and chemical composition to Italian blending and hybrid breeding, helping coffee enthusiasts build a more complete understanding of coffee varieties.
For more specialty coffee knowledge, please follow: Front Street Coffee (Frontsteet Coffee)
Front Street believes everyone should have heard of Arabica coffee. Currently, the coffee in specialty coffee shops on the market is generally mostly Arabica coffee beans, just like the coffee varieties at Front Street Coffee (FrontStreet Coffee), which basically all belong to Arabica coffee. But today, Front Street wants to introduce one of the three major coffee varieties: Robusta coffee.
Robusta coffee actually belongs to a variety within the Canephora species, but because everyone is accustomed to calling Canephora by the name Robusta coffee, Robusta coffee is generally used to refer to Canephora.
Front Street believes whether a coffee has good prospects depends largely on its flavor. If a coffee has a potato taste, then this coffee definitely has no market. Therefore, the reason Robusta coffee is often used in commercial beans or appears as instant coffee is that Robusta coffee usually lacks the aromatic scent of Arabica beans, and instead has more characteristics of wheat, grains, etc., and sometimes even a pungent odor. This is also one of the reasons Robusta coffee rarely appears in the specialty coffee world. On the other hand, it is not only coffee beans that contain caffeine. Beverages we encounter daily, such as black tea, cocoa, and cola, also contain large amounts of caffeine. Front Street often hears customers say that drinking coffee at night keeps them awake. This is because caffeine stimulates the central nervous system and is addictive, which is commonly known as its refreshing effect.
According to what Front Street has learned, Robusta's caffeine content is higher than that of Arabica varieties. However, there is another point worth noting: Robusta coffee also contains a large amount of chlorogenic acid. Everyone may not be very familiar with chlorogenic acid, so Front Street will give a brief introduction.
Chlorogenic acid is very unstable. The chlorogenic acid in coffee will decompose into caffeic acid and quinic acid, especially when the temperature is below 80 degrees and above 85 degrees. After chlorogenic acid decomposes, quinic acid immediately decomposes to produce a distinct bitterness, while caffeic acid decomposes to produce a distinct sourness. The combination of sourness and bitterness forms the sour-bitter mouthfeel of Robusta coffee and the flavor of aged coffee.
Compared with Robusta coffee, Arabica coffee contains half the amount of substances such as caffeine and chlorogenic acid, which is one of the reasons why Arabica coffee has a better flavor than Robusta coffee. What Front Street has said is only a small part of the reasons affecting Robusta coffee's flavor. The degree of roasting and other factors will also affect the content of substances in coffee, which Front Street will not discuss in detail here.
Many friends, upon hearing about Robusta beans, immediately think they are "something bad." Front Street believes that the emergence of Robusta coffee also has its own value. For example, in espresso blends, Robusta coffee holds an unshakable position.
In Italy, some regions pursue coffee with a darker roast and a thicker mouthfeel. They add a small amount of Robusta coffee to their blends to enhance the coffee's body and create Espresso with richer crema. After Espresso blends with cream, it presents a rich and full mouthfeel. Milk coffee, with Robusta and Arabica coffee beans complementing each other, becomes even richer and more aromatic. Front Street believes that Robusta coffee beans fill in the body that Arabica lacks, while Arabica coffee enhances the aroma of Robusta coffee beans. The formula formed by combining the two coffee beans is elevated into an art.
In addition, Robusta has also made a certain contribution to research on new coffee varieties. Arabica coffee has a very rich aroma, and its mouthfeel is also finer than Robusta to a certain extent. But Front Street found that Robusta is stronger than Arabica in drought tolerance, disease resistance, and yield. Therefore, some researchers hybridize Robusta and Arabica to select the best genes and cultivate a new variety that possesses both high-quality flavor and strong disease resistance with high yield.
Therefore, although Robusta cannot compete with Arabica in terms of flavor, it still has its value of existence. As the saying goes, whatever exists is reasonable. Front Street believes that the value of Robusta coffee still has great potential to be explored.
The above content is compiled by CoffeeHunters, a coffee news website.
