How Java in Coffee History Shaped Indonesian Beans
Sumatra Mandheling is the entry point for many drinkers exploring Indonesian coffee. The Dutch brought Arabica seedlings to Ceylon and Indonesia in the seventeenth century, and a coffee rust outbreak in 1877 pushed growers toward disease-resistant Robusta. Today Robusta makes up about ninety percent of Indonesian output, while Mandheling remains a notable Arabica.
Mandheling trees grow on hillsides at 750 to 1,500 meters. The wet-hulling process and three-stage drying used in Sumatra give the cup a thick body, low acidity, and faint chocolate notes. Java, Sumatra, and Sulawesi are the main producing areas, and arabica coffees from Sumatra carry that distinctive earthy, syrupy profile.
Indonesia is one of Asia's most important coffee-producing countries, and Sumatra Mandheling is the introductory memory of countless coffee lovers. This article starts from the common bean-selection questions encountered in the daily service of Front Street Coffee, sorts out the origin legends of Mandheling, Sumatra's unique wet-hulling process and three-stage drying method, and introduces one by one the producing areas, varieties, processing methods and brewing suggestions of four common beans—Front Street Lintong Mandheling, Front Street Golden Mandheling, Front Street Tiger Mandheling and Front Street Aged Mandheling—to help readers understand the flavor logic of Indonesian coffee more systematically.
To learn more about specialty coffee, you can follow the WeChat official account: Front Street Coffee. At the stores or Tmall flagship store of Front Street Coffee, almost every day customers ask how to choose from the dazzling bean list. At present, Front Street Coffee sells more than thirty kinds of coffee beans, covering many producing areas around the world, each with distinctive flavors, and new origin batches are added from time to time. Mandheling is probably one of the Indonesian coffee names most familiar to domestic consumers, but many people actually do not know much about its origin, cultural background and anecdotes. People who come to Front Street Coffee are not just here for a cup of drink, and Front Street Coffee is not just completing a cup of output. Where does the story of Mandheling come from? In the seventeenth century, the Dutch first brought Arabica seedlings to Ceylon (now Sri Lanka) and Indonesia. By 1877, a large-scale disaster swept across the Indonesian archipelago. Coffee rust almost destroyed all local coffee trees, and growers were forced to abandon Arabica, which they had cultivated for many years, and instead introduce more disease-resistant Robusta from Africa.
Today Indonesia is already a major coffee-producing country, with main producing areas distributed in Java, Sumatra and Sulawesi. Among them, Robusta accounts for about ninety percent of total output, while Sumatra Mandheling belongs to the relatively small amount of Arabica. These coffee trees grow on hillsides at an altitude of 750 to 1,500 meters. The unique Sumatra species gives Mandheling a rich aroma, thick body, strong taste, and faint notes of chocolate and syrup. Mandheling coffee beans are relatively large and hard in texture, and are prone to defects during the cultivation stage. After harvest, strict manual sorting is often required; once control is lax, quality can easily become uneven. In addition, different roasting degrees have an obvious impact on the taste, so it is also one of the more controversial single-origin coffees. The name Mandheling is very different from other coffee beans. It is neither a producing area, a place name, a port name, nor a coffee variety name (for example, Yirgacheffe or Sidamo are both African producing area names). In fact, it is only a mispronunciation of the name of the Indonesian Mandheling ethnic group.
So how did an ethnic name become connected with coffee? There is a story of a lucky accident here: during World War II, Japan occupied Indonesia. A Japanese soldier drank a very delicious cup of coffee in a certain coffee shop and immediately asked the owner what this coffee was called. Because of the language barrier, the shop owner mistakenly thought the other party was asking "Where are you from?" so he answered: "Mandheling." After the end of World War II, this Japanese soldier recalled the "Mandheling" he had drunk in Indonesia, so he asked an Indonesian broker to ship fifteen metric tons of Mandheling to Japan. As a result, it became very popular in the Japanese coffee market, and the name Mandheling has been passed down to this day. (This broker later created the famous Pwani Coffee Company in today's Indonesian coffee world, abbreviated as PWN, which is also the trademark owner of Golden Mandheling.)
How Mandheling coffee is processed Sellers often label Lintong and Mandheling coffee as dry-processed, but in reality, the separation of pulp and coffee seed often uses a mixture of multiple modes, and more commonly it is a backyard-style wet process. Smart farmers put freshly picked coffee cherries into a crude pulper assembled from scrap metal, wood and bicycle parts. The sticky wet beans after pulping are put into plastic woven bags to ferment overnight, and the next morning the fermented soft pulp and mucilage are washed off by hand. The coffee wrapped in silver skin is placed on front-yard boards for pre-drying, then sent to middlemen's warehouses to remove the silver skin and dry further. Finally it is transported by truck to the Port of Medan (the provincial capital of Sumatra), where the third and final drying is completed.
Other reports point out that in other Mandheling producing areas, the mucilage after pulping is allowed to dry and remain attached to the beans, similar to Brazil's semi-washed process; afterward the dried mucilage and silver skin are removed by machine. Finally it also goes through two-stage drying, first in the middleman's warehouse, then in the exporter's warehouse at the Port of Medan. The reason for describing these processing steps in such detail is that it is still unclear to what extent soil, atmosphere, unusual processing techniques and three-stage drying each affect the formation of the characteristics of Lintong and Mandheling coffees. One thing is certain: these processes can occasionally produce extremely good coffee, while also being extremely unstable. Only the relentless sorting in the warehouses of Medan port exporters can ensure that the deep body and unique yet understated richness of Lintong and Mandheling emerge from other distracting flavors.
Sumatra Mandheling DP Grade 1 and Aged Sumatra Mandheling The most famous coffee-producing areas in Asia are the islands of the Malay Archipelago: Sumatra, Java and Kalimantan. Among them, Sumatra Mandheling coffee produced on the Indonesian island of Sumatra is the most renowned. It has two famous product names—Sumatra Mandheling DP Grade 1 and Aged Sumatra Mandheling. Sumatra Mandheling DP Grade 1 has a long aftertaste, with a kind of wild mountain fragrance, the unique earthy scent of primitive forests. In addition to the mellow taste unique to Indonesian coffee, it also has a bittersweet flavor, sometimes mixed with a slight faint musty smell, and is deeply loved by those who like strongly roasted coffee. Aged Sumatra Mandheling is called "aged" because it must be stored in cellars for three years before export. But aged coffee is by no means stale coffee; rather, it is slightly pale coffee obtained through special processing. This kind of coffee is richer, with lower acidity, higher body, and a longer aftertaste. It also carries a strong spice flavor, sometimes tartness, sometimes walnut, sometimes chocolate.
In the era before Blue Mountain was made public, Mandheling coffee was once regarded as the world's finest. After roasting, the beans are very large. Green beans are brown or dark green, with a special caramel-like aroma. The taste is fragrant and rich, sweet and bitter, without soft acidity, but with bitterness. Production is relatively small, so the price is slightly higher than ordinary coffee beans.
The producing area of Mandheling coffee Mandheling coffee is produced in Sumatra, Indonesia, in Asia, and is also called "Sumatra coffee." The main producing areas include Java, Sulawesi and Sumatra, of which ninety percent is Robusta. Among them, the "Mandheling" produced on Sumatra is the most famous. The best of the fine traditional Arabica coffees produced in northern Sumatra are sold on the market under the names Lintong and Mandheling. Strictly speaking, Lintong refers to coffee grown in a small area southwest of Lake Toba in the Lintong administrative region. The small coffee-growing areas are scattered across a high, undulating clay plateau covered with ferns. Lintong coffee is not shade-grown, does not use chemicals, and is almost entirely owned by smallholders. Mandheling is a broader term, including Lintong coffee and coffee from Diari (capital Sidikalang) and the northern Lake Toba growing area under similar conditions.
The flavor characteristics of Mandheling coffee Mandheling's flavor is very rich: fragrant, bitter, mellow, with a little sweetness. Most coffee lovers drink it as a single origin, but it is also an indispensable variety in blending mixed coffee. Mandheling has a heavy taste, with rich body and a lush, lively dynamism. It is not astringent or sour, and its body and bitterness can be fully expressed. The appearance of Mandheling coffee beans can be said to be the ugliest, but coffee fans say that the uglier Sumatra coffee beans are, the better, mellower and smoother they taste. Mandheling coffee is considered the world's most full-bodied coffee. When tasting Mandheling, you can feel obvious lubrication on the tip of your tongue. At the same time, it has relatively low acidity, but this acidity can also be clearly tasted. The lively slight acidity mixed with the richest aroma lets you easily experience the lively element within its mild richness. In addition, this coffee also has a faint earthy aroma, which some describe as the aroma of herbaceous plants.
Because Mandheling coffee beans themselves do not have acidic characteristics, generally special brewing methods are based on Mandheling coffee beans. When kept warm for a long time or made into iced coffee, there is no unpleasant sour or astringent taste. What common Mandheling coffees are there? Here we introduce four common Mandheling coffees, namely Front Street Lintong Mandheling, Front Street Golden Mandheling, Front Street Tiger Mandheling and Front Street Aged Mandheling. 1. Front Street Lintong Mandheling A specialty Mandheling produced in the Lintong area, with relatively large beans and a relatively hard texture. Indonesian coffee varies greatly in quality, but what we usually call Mandheling refers to coffee beans of Typica or its variants grown in the mountains around Lake Toba. Coffee gourmets around the world have commented: Sumatra Mandheling coffee has the best body in the world. Mandheling coffee beans are relatively large and hard in texture. Because there are many defects, strict selection is required during coffee processing. Mandheling coffee is an indispensable variety in blending mixed coffee. Its coffee flavor is rich, sweet and fragrant, purely bitter, mellow, with a little sweetness and slight acidity.
Front Street Coffee: Lintong Mandheling coffee beans Producing area: Lintong producing area Altitude: 1100-1600m Variety: Typica, Caturra Processing method: wet-hulled process 2. Front Street Golden Mandheling Golden Mandheling was registered as a trademark by Indonesia's PWN company, and Golden Mandheling thus became exclusive to PWN. Golden Mandheling is produced in the Gayo Mountains of Aceh, North Sumatra. The variety is Ateng. Ateng is a hybrid between Arabica and Robusta, widely planted in Sumatra and other small Indonesian islands. In fact, it is a branch of Catimor; Ateng is the local name. Golden Mandheling 19 mesh has undergone four manual selections, with higher quality requirements.
Front Street Coffee: PWN Golden Mandheling coffee beans Producing area: Gayo Mountains, Aceh Altitude: 1100-1600 meters Variety: Typica Processing method: wet-hulled process Roasting curve Front Street Coffee believes that Golden Mandheling is a green bean with relatively high moisture. It has a relatively large difference in moisture compared with sun-dried beans, so special attention must be paid during dehydration. For green beans with high moisture content, you can try closing the air vent immediately after charging the green beans, soak for 30 seconds, then open to 3, until the green bean color turns light green or white, open the air vent to 4, and after first crack open to 5 (maximum).
Brewing parameters For daily brewing of Mandheling, Front Street Coffee suggests using a KONO dripper, because the body it brings out is rounder and mellower, and the flavor expression is also more direct. The only exhaust part of the Kono dripper is that one-quarter of the ribs. When the water level crosses the rib area, the water volume in the dripper keeps rising, increasing pressure through the weight of the water. Because the outlet is relatively small, it can extend the contact time between coffee particles and water. Driven by the water flow, this can more effectively bring out soluble substances. With this brewing method, Front Street Coffee can generally achieve the high-body effect expected by customers.
Dripper: Kono dripper Water temperature: 86°C Dose: 15 grams Coffee-to-water ratio: 1:15 Grind size: medium-fine grind (70% passing through a No. 20 sieve) Brewing method: Segmented extraction Use 30 grams of water for a 30-second bloom, pour in a small stream in circles until 125 grams for the segment, and when the water level is about to expose the coffee bed, continue pouring until 225 grams and stop pouring. When the water level is about to expose the coffee bed, remove the dripper. (Start timing from the beginning of the bloom.) The extraction time is 2'00".
Flavor description Layered and varied, mellow and clean, highly balanced, with rich nut and caramel aroma, chocolate notes, and a lasting finish. 3. Front Street Tiger Mandheling Only Mandheling of 17 mesh or above with a defect rate below 4% can be called Tiger Mandheling. The main varieties of Tiger Mandheling are Caturra and Typica. Caturra has a citrus and lemon acidity in taste, while Typica has a long-lasting sweet aftertaste, making Tiger Mandheling relatively even in taste and high in cleanliness.
Front Street Coffee: Tiger Mandheling coffee beans Producing area: Aceh Altitude: 1500m Variety: Typica, Caturra, Sidikalong Processing method: wet-hulled process 4. Front Street Aged Mandheling Aged coffee beans do not mean leaving green coffee beans for a long time. This is not acceptable, because green coffee beans will also spoil if left for a long time. They will change from fresh blue-green to white, then to yellow, becoming bland, and may even grow insects. Like aged wine, green beans must undergo proper processing and long-term storage before they can be called true aged coffee. The so-called aged beans mean: Green beans are allowed to age naturally by extending storage time (usually 2 to 3 years). These changes include weakened acidity, color change and thicker bean texture. The storage environment must be cool and ventilated. Because the storage environment is relatively dark and the time is long, aged coffee always struggles to escape complex flavors resembling mustiness or what is commonly called burlap or leather.
Front Street Coffee: Aged Mandheling coffee beans Producing area: Sumatra Variety: Typica Processing method: wet-hulled process
The above content is compiled by CoffeeHunters, a coffee news website.
