What Is Arabica Bean and How Does Robusta Compare in Pour-Over?

Deep-roasted Vietnamese Robusta brewed as pour-over delivers a heavy body with high oil content and strong caffeine, but its flavor profile keeps it out of most specialty pour-over lineups. Comparing it with what is arabica bean clarifies the gap: Arabica's center line is mostly curved, while Robusta's is a straight line.

Robusta costs roughly half the price of Arabica, and its oils add caramelized aroma and thick mouthfeel to espresso blends. That is why it appears in recipes like Front Street's classic blend of Brazil, Mandheling, and Robusta, which brings nutty and toasted bread notes, a full body, and a pronounced crema suited to beginners and cafés balancing cost and stability.

Robusta is often seen as exclusive to espresso blends, but how would it perform when used for pour-over? Front Street Coffee conducted a brewing experiment with deep-roasted Robusta beans from Vietnam, recording the changes from wet aroma to first sip to post-cooling. This article also outlines Robusta's advantages in oils, body, and price, as well as why it struggles to enter the specialty pour-over scene. It also introduces the division of labor among producing regions in Front Street's classic blend and its in-store espresso recipe. If you're also curious about Robusta's true flavor, why not follow along with Front Street's cupping experience and find out.

Today, Front Street is here to chat with everyone about what kind of taste you'd get if you used a pour-over method to "take on" Robusta. Before that, Front Street will briefly introduce what Robusta actually is.

What Is "Robusta"

"Robusta" is everyone's shorthand for Robusta. Because the coffee it produces has such a distinctive character, people gave it a nickname of its own—it wasn't meant to be deliberately excluded. Robusta and Arabica have one easily recognizable difference in appearance: Robusta's center line is a straight line, while Arabica's center line is mostly curved.

Currently, the coffee varieties with commercial value on the market are mainly Arabica and Robusta. But because Robusta's flavor performance is not ideal enough, it has not become widely popular in specialty coffee, especially in the pour-over scene.

However, Robusta is not without its strengths. Its most prominent advantage is its very high oil content and full body. The oils can bring more caramelized aroma to espresso, and the thick mouthfeel makes the whole cup fuller. Therefore, it often appears as a member of espresso blends. In addition, its price is also very friendly, usually about half cheaper than Arabica.

Robusta has high caffeine content and is also rich in oils. During the period when espresso swept the globe, it was often written into espresso bean recipes. At that time, many people drank coffee largely to get caffeine. Front Street's classic blend uses a combination of Brazil + Mandheling + Robusta, giving the coffee rich nutty and toasted bread aromas, as well as a thick mouthfeel and beautiful crema, making it very suitable for beginners.

In addition, for café owners, because they need to balance stability, cost-effectiveness, and compatibility, a combination of Colombia + Brazil + Robusta is used. Brazil is responsible for creamy nutty aromas, Colombia provides chocolatey sweetness, and Robusta adds body and oils, so that even novice baristas can easily make a standard espresso.

From the above, it can be seen that if you want to find a coffee shop on the market that makes pour-over beans out of Robusta, the probability is very small (they exist, but not many). Therefore, today Front Street will experience for everyone what pour-over coffee made with Robusta tastes like.

Brewing Experiment

The Robusta used by Front Street comes from Vietnam and is deep-roasted, so we will "handle" it using deep-roasted bean extraction parameters.

Dripper used: Kono dripper

Dose used: 15g

Grind setting: ek43 setting 11 (70% passing through a No. 20 sieve)

Coffee-to-water ratio: 1:15

Brewing temperature: 88°C

Brewing method: three-pour

First, we still bloom with twice the coffee dose in water (30ml). After 30 seconds, pour the second pour of hot water (120ml) in a steady small stream in a large circular motion; finally, pour the remaining third pour of hot water (75ml) in the center of the dripper in a large steady stream in a small circular motion; after that, simply wait for the drip to finish and the brewing is complete.

During the brewing process, we can clearly smell a wet aroma of hazelnut and caramel. Moreover, this aroma spreads quickly and soon fills the entire Front Street shop. When tasting, caramel and grain-like flavors are very obvious, but more than anything it tastes like barley tea, with a very thick mouthfeel and not much bitterness. Freshly brewed Robusta is actually pretty good.

But after sitting for a while, once the temperature drops, its shortcomings are exposed. The grain flavor intensifies, with a hint of rubber, low cleanliness, mixed with an earthy fishy smell and a bitter finish—the negative sensations are very obvious.

From the above, it can be seen that Robusta's taste is indeed not outstanding enough. To a large extent, this is due to its caffeine and chlorogenic acid both being higher than Arabica's. With these two bitterness contributors, Robusta will be much more bitter than Arabica. In addition, the one Front Street tasted is a commercial Robusta bean, grown at an altitude below 800 meters, which causes it to grow faster and fail to fully absorb nutrients, so its flavor also has certain defects.

But Robusta is not all bad. Nowadays, some people try to apply the methods of growing Arabica to Robusta cultivation in order to cultivate "specialty-grade" Robusta, and the result has indeed been achieved. This type of high-quality Robusta tastes very clean. Although the flavor still revolves around the original caramel, grain, and hazelnut, without much change, overall it is still quite good. It's just that because the quantity is scarce, it is difficult for it to reach China and be experienced by us.

Well, Front Street can't keep good things to itself. It just so happens that there are friends nearby, so let's all experience Robusta's "wonderfulness" together!

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