How Do You Brew Golden Mandheling in a Pour-Over?

Front Street Golden Mandheling is a heavy-bodied, distinctly bitter bean, so pour-over parameters need to be set around that Mandheling character. Grind size, water temperature, dripper choice, and pulse pouring all matter, because this bean is usually recommended for drinkers who want a strong, bitter cup rather than a delicate floral one.

The flavor starts with wet-hulling, Indonesia's processing method. After the pulp is removed and the beans ferment in water for about three hours, the parchment is hulled while moisture is still at 20–24%, then drying continues to 13%. That high-friction step is what gives green coffee beans the herbal, low-acid profile typical of Mandheling.

Front Street Golden Mandheling is a bean on the Front Street menu with quite prominent body and bitterness, often recommended to guests who prefer strong, bitter coffee. When brewing pour-over, questions about parameters always come up the most. In this article, Front Street will start with the origin of Mandheling flavor, then break down the key pour-over details of Front Street Golden Mandheling one by one, including grind size, water temperature, dripper choice, and pulse pouring, to help everyone brew this bean with the Mandheling character it deserves.

If we’re talking about which coffee on the Front Street menu is the fullest-bodied and has the most distinct bitter note, Front Street Golden Mandheling is certainly on the list, and it has always been the bean we prioritize recommending to guests who prefer a strong, bitter taste. When Front Street brews pour-over in the shop, guests often ask about the brewing parameters, so this time Front Street will systematically discuss how to brew Front Street Golden Mandheling with an authentic Mandheling taste.

What exactly does Mandheling flavor mean?

After Dutch colonists introduced coffee to Indonesia for cultivation in 1699, coffee gradually became the main cash crop local farmers relied on to make a living. If the traditional natural processing method were followed, the time cost would be too high, making it difficult to sell to merchants in time for money; both sun-dried and washed methods require at least 2–3 weeks of drying. What’s more troublesome is that Indonesia’s islands frequently experience wind and rain, and the air humidity is relatively high, so green coffee beans often become moldy and spoiled before they are even dried.

The wet-hulling method is consistent with the washed method in the early steps. Indonesians first remove the pulp from the coffee fruit, ferment it in water for 3 hours, wash off the mucilage, and then briefly dry the parchment-covered green coffee beans for 2 to 3 days. When the moisture content drops to 20–24% and the beans are in a semi-soft, semi-hard state, the parchment is hulled off the parchment-covered beans, followed by further drying until the moisture content drops to 13%, at which point they can be bagged.

When the huller operates, the friction is very high, tearing open the parchment layer tightly attached to the green beans. Under the friction and agitation, the green beans are also easily crushed or damaged, especially at both ends, forming small gaps, which are the so-called goat-hoof beans. The “naked beans” that have lost the protection of the parchment layer dry extremely quickly, and at the same time are directly exposed to humid air, allowing various fungi to grow, ultimately giving Indonesian coffee that unique woody, spicy, and herbal character, which is what we often call “Mandheling flavor.”

Seeing this, some friends may already be curious about what this Southeast Asian flavor is actually like. If you haven’t tried Front Street’s Mandheling yet, Front Street suggests starting with the small-pack, wet-hulled Front Street Indonesia Lintong Mandheling everyday beans, a classic Mandheling flavor that is very convenient to try at home. If you are already a “seasoned coffee drinker” and want to appreciate Mandheling’s excellent aroma, Front Street thinks Front Street Golden Mandheling coffee is just perfect.

What are the characteristics of Front Street Golden Mandheling coffee?

Front Street Golden Mandheling coffee on the Front Street bean list is PWN Company’s exclusive signature product. Because PWN registered the “Golden Mandheling” trademark early on, only Mandheling produced by PWN is qualified to be called “Golden Mandheling.”

The characteristic of Front Street Golden Mandheling coffee lies in the multiple screenings the green beans undergo, resulting in very high overall quality, and the brewed coffee has quite good cleanliness in the cup. PWN purchases Mandheling green beans of 18 screen size and above, G1 grade with fewer than 3 defective beans in a 300g sample, which is the highest grade of Indonesian green beans. Afterward, it is further sorted by 1 mechanical selection plus 3 manual defect picks according to standards, ensuring the color, shape, and size of the Mandheling coffee beans are uniform.

After Front Street sourced PWN’s Golden Mandheling, we used a medium-dark roast, hoping to present Mandheling’s classic roasted aroma. After freshly roasting Front Street Golden Mandheling, Front Street first conducted a cupping evaluation. In the dry aroma stage, cedar wood, nuts, spices, and herbs can be smelled; after hot water is poured, licorice and caramel aromas emerge; on the palate, there are flavors of dark chocolate, cocoa, nuts, and spices, with overall cleanliness, obvious sweetness in the finish, and high body. With such a rich flavor profile, Front Street naturally wanted to extract and taste it as pour-over. Below, Front Street will discuss the pour-over details of Front Street Golden Mandheling based on several key parameters.

Pour-over grind size

Grind size is one of the key factors affecting coffee flavor. After coffee beans are ground into powder and come into contact with hot water, a large amount of water-soluble flavor substances is released. In the same immersion time, the finer the particles, the more substances are extracted; the coarser the particles, the fewer substances are extracted. Simply put, the coarser the grind, the weaker the coffee taste; the finer the grind, the stronger the coffee taste.

Front Street adjusts grind size with the help of a tool—China No. 20 0.85mm standard sieve. For medium-light roasted coffee beans, Front Street consistently uses a 75–80% passing rate, while for medium-dark roasted coffee beans, 70–75% is used. Compared with light-roasted coffee, the internal structure of medium-dark roasted Mandheling beans is looser, absorbs water better, and tends to release large-molecule bitter substances. To avoid over-extraction, Front Street chooses a coarseness with a 75% passing rate on the No. 20 standard sieve.

In practice, Front Street first weighs 10 grams of coffee beans, grinds them according to the estimated setting, then puts the ground coffee into the upper sieve and shakes it vigorously; particles smaller than 0.85mm will fall into the lower layer. Finally, weigh the coffee powder caught in the lower layer and divide by 10 grams to get the passing rate. If the passing rate is lower than the target parameter, the coffee powder is too coarse and needs to be adjusted finer; if it is higher than the target, it is too fine and needs to be adjusted coarser.

Pour-over water temperature

Water temperature works similarly to grind size: the higher the water temperature, the higher the extraction efficiency, the easier it is to release various substances and components, and the higher the concentration. If brewing with hot water close to boiling, it is easy to extract unpleasant bitter substances, so when brewing medium-dark roasted coffee beans, Front Street uses different parameters from light-roasted coffee beans. Medium-dark roasted beans undergo more caramelization reactions than light-roasted beans and more easily release bitter large-molecule substances. To avoid extracting too many off-flavors, Front Street appropriately lowers the water temperature. The brewing water temperature for light-roasted coffee is 91–93°C; for medium-dark roasted coffee beans, Front Street recommends 87–88°C.

Dripper

Friends who often read Front Street’s brewing suggestions should know that Front Street prioritizes the KONO dripper when brewing coffee beans that emphasize body. Visually, the KONO dripper has ribs only in the middle-lower part, while the upper part is a smooth curved surface. When we rinse the dripper, the filter paper can fit tightly against the wall of the dripper, restricting airflow during coffee extraction, so hot water stays in the dripper longer, the extraction yield increases, concentration rises accordingly, and the coffee tastes richer and fuller-bodied. The KONO dripper is also suitable for full-bodied flavor-type beans such as Front Street Brazil Queen’s Estate coffee and Front Street Jamaica Blue Mountain No. 1.

Pulse pouring

If you are a beginner and your water-control ability is not yet strong, and the flow is not stable enough, then pulse pouring is the simplest and most compatible pouring method. For example, if our brewing time is 2 minutes, and the earlier pouring took more time than planned, then the later pouring should increase the flow; conversely, if the earlier flow was too fast, you can control it into a slower, smaller stream.

Front Street generally uses three-pulse pouring, with a 1:15 coffee-to-water ratio, 15 grams of coffee for 1–2 servings, meaning a total brew water amount of 225 grams.

For the first pulse, gently pour 30 grams of water for blooming, with a blooming time of 30 seconds. For the second pulse, pour to about 125 grams of water, circling outward evenly and steadily. Then wait for the coffee liquid to drop; when it has dropped by half, pour the final pulse up to 225 grams. After all the coffee has dripped through, the total extraction time is generally about 2 minutes.

The pour-over Front Street PWN Golden Mandheling coffee has a noticeably solid mouthfeel, with richer aromas of fir wood, spices, dark chocolate, and roasted hazelnut, a clean aftertaste, and a full, substantial flavor, in which you can feel the sweetness of caramel and its lingering finish.

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