Is Golden Mandheling a G1 Grade Indonesian Coffee?
Golden Mandheling is typically sorted and sold as G1, the top tier in Indonesia's green bean grading, which limits defect counts and supports a cleaner cup. The name Mandheling itself refers to North Sumatra Arabica rather than a single variety, and PWN is the company most associated with the Golden Mandheling label.
Indonesian coffee cultivation began under 17th-century Dutch colonists, and leaf rust wiped out most of the original Typica plantings. Farmers replanted with Timor, Catimor, Caturra, S795, and Robusta, then gave them local names such as Tim Tim or Bor Bor. Lintong Mandheling usually shows more earth and body, while Golden Mandheling is processed and sorted for a cleaner profile.
Indonesia's coffee cultivation history can be traced back to the 17th-century Dutch colonial period, and today Indonesian coffee occupies an important position on the global stage. However, due to historical factors, Indonesia's coffee variety system is exceptionally complex, and its green bean grading system is little understood by most. Front Street Coffee will guide you through the quality classification methods of Indonesian coffee, focusing on answering whether Golden Mandheling belongs to the G1 grade, and analyzing why it tastes cleaner than Lintong Mandheling. The article will also cover PWN company's Golden Mandheling green bean information, Front Street's roasting curve and brewing parameters, as well as detailed flavor descriptions.
Coffee cultivation in Indonesia began at the hands of Dutch colonists in the 17th century, and having developed to the present day, Indonesian coffee's status on the international stage can no longer be underestimated. Also for historical reasons, Indonesia's coffee varieties have always presented an intricate web of relationships, and its green bean grading system is little known. Front Street Coffee is here today to discuss how to distinguish the quality levels of Indonesian coffee.
Why are Indonesian coffee varieties so complex? The root cause of Indonesia's extraordinarily complex coffee variety system lies in the devastation wrought by leaf rust disease. Most of the Typica trees planted by the Dutch back then became infected and withered, and in order to preserve coffee production, disease-resistant varieties had to be introduced from surrounding regions. Timor, Catimor, Caturra, S795, Robusta, and others entered Indonesia against this backdrop. And because Indonesian coffee farmers generally have limited education, after these varieties were distributed to them for planting, many localized names emerged. For example, what we commonly call the Timor variety is known in Indonesia as Tim Tim or Bor Bor.
Faced with such a bewildering array of green bean varieties, it is difficult for Indonesia to name its coffee by a single variety. Combined with the factor of historically famous origins, coffee produced on Java Island is typically called Java coffee, Arabica from North Sumatra is called Mandheling coffee, and the most famous coffee from Sulawesi Island is Toraja coffee—named after the ethnic group on the island known for coffee cultivation. There is also Kopi Luwak, named for its unique processing method.
PWN company's Golden Mandheling coffee beans come from the Gayo Mountain region of Aceh Province at the northernmost tip of Sumatra, and the variety is Ateng, which is the local name given to Catimor after it was introduced to Aceh for cultivation—Ateng being short for Central Aceh.
Indonesia's complex green bean grading standards Such a complex green bean variety system has also given rise to a cumbersome set of coffee grade standards in Indonesia. Its grading is roughly based primarily on the number of defect beans, with coffee bean particle size as a supplementary reference.
Based on defect rate, it is divided into six grades from G1 to G6.
Coffee bean particle size designation Some higher-quality Indonesian coffees will also indicate the coffee mesh size, for example Golden Mandheling will be labeled 17 mesh/18 mesh.
Number of sorting passes In addition to the above grading standards, some specialty-grade Indonesian coffees will also undergo hand sorting, indicated on the label as Double Picked or Triple Picked. This is because Indonesia mostly uses the wet-hulling process, during which defective beans are easily produced, and the more hand-sorting passes, the better the coffee quality.
Front Street Coffee received a batch of Golden Mandheling coffee in December 2020 from the new crop season of October that year. The packaging bag is printed with the basic information of the coffee beans—let's take a look together.
PWN: This is the logo of Pawani company
GOLDEN MANDHELING: Golden Mandheling
TRIPLE PICKED: Triple hand-sorted, reflecting its exceptional quality
COFFEE ARABICA: Arabica coffee, referring to the variety of the coffee beans. PWN had previously been selecting coffee beans from the Lintong region (variety Typica), but in recent years coffee farmers in the Lintong region have grafted tree varieties in pursuit of yield and profit, causing quality to decline significantly. Therefore, they have now shifted their production area to the Gayo Mountains of Aceh, with the variety being Ateng.
GRADE 1: This is the standard in Indonesia's green bean grading system, with G1 being the highest grade, where the total defect count in the green beans is fewer than 11.
PROD.OF INDONESIA: meaning product of Indonesia, produced in Indonesia
30 KGS NET: 20 kilograms including the burlap sack
EXP: 10.2024: Shelf life until October 2024, which also happens to confirm that this batch is from the October 2020 crop season.
Front Street Coffee Roasting Analysis Golden Mandheling possesses a fine herbal aroma, a more intense caramel sweetness, and a relatively steady and elegant fruity acidity. It has a rich sweetness and a mellow, wild spice flavor. Generally, Lintong Mandheling is best roasted until after second crack before being removed from the roaster, which can effectively reduce off-flavors, but Golden Mandheling achieves excellent transparency and sweetness even when removed before second crack, giving it a broader range for roasting interpretation.
Charge the roaster when the drum temperature reaches 200°C, set the airflow damper to 3, adjust the heat to 160°C after 1 minute, keep the damper unchanged, roast until 5'40 at a temperature of 148°C; the bean surface turns yellow, the grassy smell completely disappears, dehydration is complete, adjust the heat to 140, change the damper to 4;
At 9'40, ugly wrinkles and dark streaks appear on the bean surface, and the toast aroma clearly shifts to coffee fragrance, which can be defined as the prelude to first crack. At this point, listen carefully for the sound of the first crack. At 9'54, first crack begins; reduce the heat to 60, open the damper fully (adjusting the heat must be done very carefully—do not reduce it so much that there is no crackling sound), and remove from the roaster at 204.5°C.
Front Street Coffee Brewing Sharing This brewing highlights the mellow, clean, and aromatic characteristics of Golden Mandheling, using a KONO dripper for brewing (this dripper was invented to mimic the rich coffee produced by flannel). For medium-dark roasted coffee, choose a medium-coarse grind (57% passing through a No. 20 standard sieve). Use a coffee-to-water ratio of 1:13, with 20 grams of coffee grounds; lowering the coffee-to-water ratio pushes the coffee toward a richer mouthfeel. Use a water temperature of 87°C.
Brewing process: Slowly pour in the coffee grounds, keeping them as level as possible during pouring, and avoid shaking the dripper (because shaking reduces the spacing between coffee grounds, which is not conducive to degassing during blooming). For the first pour, circle in a small motion in the center and pour 40g of water to bloom for 30 seconds; the coffee bed will slowly expand and puff up into a "hamburger."
For the second pour, circle outward from the center and pour 120g of water, keeping the pour height as close to the coffee bed as possible, moving slowly to avoid excessive agitation. For the final pour, add 100g, and wait for all the coffee liquid in the dripper to flow into the server to end the extraction. Total extraction time is 2 minutes.
Golden Mandheling flavor description: nuts, chocolate, spices, herbs, caramel. Golden Mandheling drinks cleaner than Lintong Mandheling—the herbal, earthy, and woody notes inherent to Mandheling are almost gone, but the caramel sweetness is more intense, and the fruity acidity is brighter and more elegant.
The above content is compiled by CoffeeHunters, a coffee news website.
