How Should You Brew Golden Mandheling?

Golden Mandheling from Indonesia's PWN is known for a rich, full body and dark roast profile, with spice and herbal notes. To keep those flavors without the cup turning bitter, pour-over needs careful control of grind size, water temperature, dripper choice, and pouring style. Front Street baristas use pulse pouring to bring out a clean, sweet finish with layers.

The flavor starts with wet-hulling, a process born in Indonesia's humid climate. Farmers remove skin and pulp, ferment the beans in water for about three hours, wash off the mucilage, then dry the parchment briefly for two to three days. When moisture drops to 20-24 percent, the parchment is removed and drying continues, giving Mandheling its heavy body and spice.

Mandheling is known for its rich, full-bodied character, and the Golden Mandheling produced by Indonesia's PWN is the benchmark among them. After Front Street Coffee added this bean to its menu, it has remained the top recommendation for espresso lovers. This article starts with the wet-hulling process to analyze the source of Golden Mandheling's unique flavor, and then, focusing on key steps such as grind size, brewing water temperature, dripper selection, and pulse pouring, breaks down in detail the pour-over approach of Front Street Coffee's baristas, helping you preserve the spice and herbal notes while avoiding bitterness, and brew a clean, sweet-finishing, richly layered cup of Golden Mandheling.

People who prefer a rich, full-bodied cup of coffee are probably no strangers to the name Mandheling. On Front Street's pour-over menu, the bean with the fullest body and the darkest roast is Front Street Golden Mandheling, and it has long been the first choice recommended by Front Street Coffee's baristas to lovers of strong coffee. However, if you want Front Street Golden Mandheling to show off its distinctive spice and herbal charm without being so bitter it is hard to swallow, there are indeed some finer points to the process. Below, let's talk about the key points of pour-over Mandheling.

The Origin of Mandheling's Flavor

After Dutch colonists brought coffee to Indonesia for cultivation in 1699, coffee gradually became the most important source of income for local farmers. If the traditional natural processing method were followed, the time cost would be too high, making it very difficult to process the beans before merchants came to buy them—sun-drying or washing would each require a drying period of at least 2 to 3 weeks. What was even more troublesome was that Indonesia's islands frequently experience wind and rain, and the air is humid, so green beans often became moldy and unusable before they had even dried.

The first half of the wet-hulling method is the same as the washed method: Indonesians first remove the outer skin and pulp of the coffee fruit, let the beans ferment in water for 3 hours, and after washing off the mucilage, the wet beans still in parchment are first dried briefly 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 then removed, and drying continues until the moisture content falls to 13%, at which point they can be bagged.

The huller uses relatively strong friction to tear open the parchment layer clinging tightly to the green beans. During the friction and agitation process, the green beans themselves are also easily cracked or crushed, especially at both ends, forming small gaps, the so-called goat-foot beans. The "naked beans" that have lost their parchment protection dry extremely quickly, but at the same time are directly exposed to humid air and are prone to developing specific strains of bacteria. It is precisely this that gives Indonesian coffee its unique woody, spicy, and herbal character, what everyone commonly calls the "Mandheling flavor."

What Exactly Is Golden Mandheling?

Golden Mandheling is PWN's exclusive signature product. Because the company registered the "Golden Mandheling" trademark early on, only Mandheling produced by PWN is eligible to bear the name "Golden Mandheling." The characteristic of this bean is that the green beans undergo layer upon layer of screening, and the overall quality is quite high, with the extracted coffee performing excellently in terms of cleanliness. PWN purchases Mandheling green beans of 18 screen size and above, and applies the G1 grade standard of fewer than 3 defective beans in a 300g sample, which is already the highest standard for Indonesian green beans. After that, it strictly carries out 1 machine screening plus 3 rounds of hand sorting to ensure that every Mandheling bean tends to be consistent in color, shape, and size.

After Front Street received PWN's Golden Mandheling, it chose a medium-dark roast in order to present Mandheling's classic caramelized aroma and mouthfeel. After the freshly roasted Front Street Golden Mandheling was completed, Front Street first conducted a cupping evaluation. In the dry aroma stage, notes of cedar wood, nuts, spices, and herbs can be detected; after hot water is poured in, licorice and caramel emerge; on the palate, there are flavors of dark chocolate, cocoa, nuts, and spices, with an overall clean cup, obvious sweetness in the finish, and a full body. Faced with such a rich flavor profile, Front Street naturally wanted to extract and taste it by pour-over. Next, Front Street will discuss the pour-over details for this high-quality bean based on several key parameters.

How Coarse Should Mandheling Be Ground for Pour-Over?

Grind size is one of the key variables affecting coffee flavor. After coffee beans are ground into powder and come into contact with hot water, a large amount of soluble flavor substances is released. Within the same steeping time, the finer the particles, the more substances are extracted; the coarser the particles, the fewer substances are extracted. To put it plainly, the coarser the grind, the weaker the coffee; the finer the grind, the stronger the coffee.

When adjusting the grind size, Front Street uses a tool—the Chinese No. 20 0.85mm standard sieve. For medium-light roasted beans, Front Street usually aims for a 75–80% passing rate; for medium-dark roasted beans, it uses 70–75%. Compared with light-roasted beans, medium-dark roasted Mandheling has a looser internal structure and a stronger water-absorption effect, making it easy to release large-molecule bitter substances. To prevent over-extraction, Front Street sets the passing rate through the No. 20 standard sieve at around 75%.

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

What Is the Appropriate Brewing Water Temperature?

The role of water temperature is somewhat similar to that of grind size: the higher the water temperature, the higher the extraction efficiency, the easier it is to release various components, and the higher the concentration. If you brew with water close to boiling, bitter substances are easily brought out. Therefore, when brewing medium-dark roasted beans, Front Street uses parameters different from those for light-roasted beans. Medium-dark roasted beans undergo a more complete Maillard reaction and caramelization than light-roasted beans, making it easier to release bitter large-molecule substances. To avoid too many off-flavors, Front Street lowers the water temperature slightly: for light-roasted coffee, use 91–93°C; for medium-dark roasted coffee, Front Street recommends 87–88°C.

How to Choose a Dripper

Friends who usually follow Front Street's brewing suggestions should know that when brewing beans that emphasize body, Front Street gives priority to the KONO dripper. You can tell from its shape that only the middle and lower parts of the KONO dripper have ribs, while the upper part is a smooth curved surface. As a result, after the dripper is rinsed, it fits tightly against the filter paper, the release of air during coffee extraction is restricted, and the residence time of hot water in the dripper is prolonged, so the extraction yield increases, the concentration rises, and the coffee tastes richer and fuller. Full-bodied beans like Front Street Brazil Queen's Estate Coffee are also suitable for the KONO dripper.

Pulse Pouring

If you are a beginner whose water-control ability is not yet strong and whose flow is not steady enough, pulse pouring is the simplest pouring method with the highest margin for error. For example, suppose the total brewing time is 2 minutes. If the first stage of pouring takes more time than planned, then increase the flow appropriately later to make up for it; conversely, if the first stage flows too fast, then pour more slowly with a smaller stream later.

Front Street generally uses three-stage pouring, with a coffee-to-water ratio of 1:15. For 1–2 servings, use 15 grams of coffee, with a total water amount of 225 grams.

In the first stage, gently pour 30 grams of water for blooming, and bloom for 30 seconds; in the second stage, pour to about 125 grams, going outward in even, steady circles. Then wait for the coffee liquid level to drop, and when it has fallen by half, pour the final stage of water up to 225 grams. Wait until all the coffee liquid has finished dripping. The total extraction time is about 2 minutes.

The pour-over Front Street PWN Golden Mandheling has a solid, full-bodied mouthfeel on the palate, and after swallowing you can feel a caramel-like sweetness and lingering finish. After the temperature drops slightly, the aromas of fir, spices, dark chocolate, and hazelnut become even more intense, with a clear, sweet finish and very rich layers.

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