What Does Robusta Coffee Taste Like and Who Should Drink It?

Robusta is one of the three main coffee species alongside Arabica and Liberica, and it carries strong bitterness with woody notes. That profile makes it common in instant coffee and blends rather than single-origin specialty offerings. Arabica, by contrast, leans toward floral, fruity, nutty and caramel notes and dominates the specialty coffee market.

The two differ in growing conditions, flavor and price, and higher cost does not automatically mean a higher grade. Arabica's main subspecies include Typica, Bourbon and Geisha. Tasting both side by side, and reading the blend label, is the practical way to decide which variety suits daily drinking.

In the world of coffee, Arabica and Robusta are the two main protagonists. The former wins the favor of specialty coffee with its floral and fruity acidity, while the latter is often used in instant coffee and blends due to its strong bitterness and woody notes. But is Robusta really not worth mentioning? This article will comprehensively analyze the true face of Robusta coffee from variety origin, growing conditions, flavor characteristics to practical applications, and explore why it still holds a place in commercial blends. At the same time, we will also sort out the main subspecies of Arabica, such as Typica, Bourbon, and Geisha, to help you make a coffee choice that suits you better after understanding the differences between varieties. Front Street Coffee will also share its views on Robusta and blending experience.

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When it comes to coffee varieties, many coffee enthusiasts may not pay much attention in daily life, but for those familiar with coffee, varieties are an unavoidable topic, because different varieties often mean completely different flavor directions. There are many coffee varieties in the world, but they basically all originate from three native species: Arabica, Robusta, and Liberica. Among them, Liberica has extremely low production, and the most common ones on the market are Arabica and Robusta (hereinafter referred to as Robusta beans).

The specialty coffee field is almost dominated by Arabica, while Robusta appears more often in blended beans. The reason behind this is closely related to the flavor genes carried by the two varieties themselves. As for which is higher-grade, Arabica or Robusta, Front Street has always believed that every coffee has its own personality, and a high price does not equal the highest grade. Finding coffee that matches your own taste is the best choice.

The flavor of Arabica is usually dominated by floral and fruity notes, or a sweet-and-sour sensation like nuts and caramel. It is generally highly accepted and easier to please people, so it is mostly used for single-origin specialty coffee; in contrast, Robusta has a relatively single flavor expression, prominent bitterness, and is not smooth enough on the palate. For many people, it is harder to accept, so it is often used in the production of espresso and instant coffee.

Arabica variety coffee

Arabica is the earliest discovered coffee variety and is also recognized as the highest quality category. It is currently the most widely planted coffee bean variety in the world, produced in Central and South America, Africa, Asia, and other places. The source of all Arabica varieties can be traced back to Ethiopia. To this day, many unrecorded coffee tree species are still hidden in that primitive forest. Robusta, on the other hand, originated in the Congo region of West Africa and actually belongs to the Canephora species (also called the Congo species). Unfortunately, among the Canephora species, only Robusta has been commercialized and widely known, so that today Robusta has almost become synonymous with the entire Canephora species group.

Arabica is extremely picky about its growing environment, and suitable temperature and high altitude are the basic thresholds for cultivation. Different altitudes, temperatures, microclimates, humidity, and soil conditions will all make Arabica present completely different flavors. Because it is grown at higher altitudes, with large temperature differences between day and night, the growth cycle of the coffee tree is lengthened, and the accumulation of flavor substances is also richer. For example, the Geisha coffee from Hacienda La Esmeralda in Panama, even if introduced to Ethiopia, is difficult to match the performance of the Panama production area in flavor. This precisely shows Arabica's sensitivity to terroir—the harsher the environment, the better the coffee flavor often is.

The suitable growing area for Arabica is 600 to 2,200 meters above sea level, with temperatures of 15 to 24 degrees Celsius and annual rainfall of 1,200 to 2,200 millimeters. It takes about 7 to 9 months from flowering to fruit maturity. The bean shape is elongated oval, and the wet aroma is strong and round. Coffee made from Arabica often shows complex flavor layers, such as floral, fruity, chocolate, and caramel aromas, with a proper balance between bitterness and acidity. Its caffeine content is less than 1.5%. Arabica beans have richer aroma and taste, and a soft, smooth mouthfeel, so they occupy a dominant position in the market.

Arabica coffee trees usually grow to 2.5 to 4.5 meters high. They tolerate low temperatures but cannot endure frost, and their drought resistance is relatively weak. The beans are larger, the flavor is clean, the taste is aromatic and mellow, and the caffeine content is low. Under Arabica there are also many subspecies, all derived from the oldest Typica of Ethiopia and Bourbon of Yemen after being transplanted to Central and South America or Asia and then mutating. The varieties are extremely rich. For example, Jamaica Blue Mountain coffee, Front Street 2013 sun-dried Typica coffee, Panama Geisha coffee, etc., all belong to this major category.

"Ancient native species"

"Typica": The oldest native variety of Ethiopia, and all Arabica are derived from Typica. Typica has bronze-colored tips and oval or slender-pointed beans; the flavor is elegant, but the tree itself is weak, has poor disease resistance, and low fruit yield. Excellent estate beans such as Jamaica Blue Mountain, Sumatra Mandheling, and Hawaii Kona all belong to the Typica family. Bronze-colored tips are one of the important characteristics for identifying Typica.

"Bourbon":

It was formed by mutation after Typica was transplanted to Yemen in the early period, and the bean shape changed from slender-pointed to round. In 1715, France transplanted the round beans of Yemen Mocha to Bourbon Island off the east coast of Africa (renamed Reunion Island after the French Revolution), and Bourbon got its name from this. In 1727, Bourbon round beans were introduced to Brazil and Central and South America; in 1732, the British transplanted Yemen Mocha to Saint Helena Island (later the place where Napoleon was imprisoned), which was also Bourbon round beans. Bourbon has repeatedly achieved good results in American specialty coffee cupping and can be called an ever-victorious general.

Geisha:

It belongs to a derivative variety of the Typica family. In 1931, it was exported from the Geisha Mountain in southern Ethiopia (Geisha is pronounced the same as the Japanese word for "geisha"). It remained unknown after traveling through many countries until it was transplanted to Panama in the 1960s, and only began to frequently win championships in cupping competitions in 2005.

At present, the most famous Geisha producing area is the Boquete region of Panama, a small town located on the eastern slope of Baru Volcano. In Boquete, the most well-known Geisha-growing estates include the famous La Esmeralda, Elida Estate, and Panama NPGE Estate. Although people around the world have tried to grow Geisha, and even Taiwan, China has introduced it, it has always been difficult to reach the level of Panama in flavor.

Robusta variety coffee

Robusta's growing conditions are far less demanding than Arabica, and it can grow normally at lower altitudes and higher temperatures. It grows faster than Arabica and is more tolerant of extreme weather. Robusta is widely planted in Vietnam, Brazil, India, and other countries, and is also grown in Hainan, China.

The suitable growing area for Robusta is 0 to 800 meters above sea level, with temperatures of 18 to 36 degrees Celsius and annual precipitation of 2,200 to 3,000 millimeters. It takes about 7 to 9 months from flowering to fruit maturity. The bean shape is relatively round, the wet aroma is weak and has a woody note, and the coffee produced has strong bitterness and low acidity. The caffeine content is between 1.8% and 3.5%. Robusta beans have a single taste, strong bitterness, and are not smooth enough on the palate. They are usually used in industrial products such as instant coffee, canned coffee, and liquid coffee, and a small portion is also used to blend espresso beans to enhance the body of the coffee. Front Street's commercial blend includes 10% Robusta beans.

Robusta mostly grows in low-altitude areas, grows quickly, and forms relatively fewer flavors. In addition, the Robusta coffee tree itself has a higher chlorogenic acid content (this is the main source of bitterness), so the taste is fuller and lower, often with flavors such as walnut, peanut, hazelnut, wheat, and grain, and sometimes even a pungent earthy taste.

Robusta belongs to one fruit, one bean, meaning there is only one coffee bean in a single fruit. The bean shape is relatively round, C-shaped; the center line is in a "1" shape.

Arabica coffee fruits usually contain two coffee beans (occasionally there is only one, and because it is a three-dimensional oval shape, people call it a peaberry or pearl bean). Arabica beans are oval, relatively slender and flat, and the center line is in a "C/S" shape.

Arabica coffee trees reproduce through self-pollination, while Robusta relies on cross-pollination. The pollination method involves genetic inheritance: offspring produced by cross-pollination possess the genetic traits of both parents at the same time, and are very likely to produce new characteristics that help the plant survive in changing environments. Therefore, self-pollinating Arabica is quite fragile, and its genes become increasingly uniform during continuous reproduction, similar to inbreeding in the biological world. Once a disease threatening coffee trees appears (such as leaf rust), it may destroy all genetically identical Arabica coffee trees. Robusta, however, can adapt to the environment by constantly changing its genes.

Robusta has a higher caffeine content and lower fat and sugar content, so its taste is more bitter and stronger. Caffeine is its best "natural pesticide" against pests.

Although Robusta's flavor is not particularly likable, it has extremely high body and rich oils. Most instant coffee on the market is made with Robusta, and after adding a large amount of saccharin and non-dairy creamer, the coffee can still taste full-bodied. Front Street Coffee's commercial blend coffee is blended with 90% Arabica and 10% Robusta. In terms of bean flavor alone, commercial beans are indeed much inferior to specialty coffee beans. They are usually used as blends, and after blending they can also make quite good coffee, suitable for espresso drinks such as lattes and cappuccinos. When Front Street Coffee's commercial blend is used to make Espresso, because of the Robusta beans, the crema is richer, the taste is classic, with caramel sweetness, nutty and cocoa-like, dark chocolate flavors, balanced acidity and sweetness, slightly bittersweet, and a lasting finish.

Front Street believes that coffee quality depends not only on the chemical properties of the coffee beans, but also on a series of human choices. The delicious Arabica coffee we drink today is not only a gift from nature, but also the result of choices continuously emphasizing quality-related factors over centuries. The subsequent choices people make in production, post-processing, roasting, and brewing will further affect the sensory quality of coffee. In the entire supply chain, the resources and time people invest in Arabica far exceed those invested in Robusta, which has a huge impact on the final flavor in the cup.

Front Street Coffee believes that Robusta's cupping scores are usually not high because the flavor quality is often unsatisfactory, and this is directly related to processing methods. Robusta is usually traded directly with a large number of defective beans mixed in, and cupping quality is not the farmer's primary consideration. But what if it is properly processed? This may affect not only farmers' production methods, but also other links in the supply chain.

Although Robusta's reputation is generally poor, Front Street believes that the bean itself should not be entirely blamed. Robusta is usually harvested by machine, which means the harvest contains rotten and unripe beans, as well as insects and branches and other debris. Such a combination is destined to produce a bad cup of coffee.

Generally speaking, the specialty coffee we drink is basically made from Arabica beans. Arabica has lower caffeine content than Robusta, but better flavor; lower oil content than Robusta, but a cleaner taste. Arabica is also more expensive because its yield is lower.

Front Street brewing suggestions:

Regardless of the coffee variety, to brew a good cup of coffee, the freshness of the coffee beans is always key. Front Street has always believed that the freshness of coffee beans has a huge impact on flavor, so the coffee beans shipped by Front Street Coffee are all within 5 days of the roasting time. Front Street's roasting principle is "freshly roasted good coffee," so that every customer who places an order can receive the freshest state when they get the coffee. The resting period of coffee is about 4 to 7 days, so when customers receive it, it is exactly at its best flavor.

For friends who need ground coffee, Front Street warmly reminds: after coffee beans are ground in advance, there is no need to rest them anymore, because during transportation the pressure generated by carbon dioxide inside the package can also make the coffee flavor rounder, so you can brew a cup immediately after receiving the coffee grounds. However, coffee grounds need to be brewed as soon as possible, because after contact with air they oxidize quickly, the flavor dissipates faster, and the coffee's mouthfeel will be compromised. Therefore, Front Street recommends buying whole beans and grinding fresh before brewing, so that you can better taste the coffee's flavor.

The above content is compiled by CoffeeHunters, a coffee news website.