Introduction:To understand the unique charm of Mandheling, you can't miss the classic wet-hulled processing method from the Sidikalang region in Sumatra, as well as the even more renowned PWN Golden Mandheling. This article delves into the characteristics of this low-acid, full-bodied Indonesian bean, and provides optimal AeroPress brewing parameters to help you bring out the sweetness and clarity of Golden Mandheling. It also teaches you how to identify authentic beans.

In the specialty coffee world, Mandheling from Sumatra, Indonesia, has always held an unshakable position. With its low acidity, rich flavor profile, and captivating herbal and spicy notes, it has won the favor of many coffee enthusiasts. Even after trying famous origins like Blue Mountain or Queen’s Estate, many still return to Mandheling — that’s the allure of its uniqueness.

Sumatra is the core coffee-producing region in Indonesia, with its plantations mainly concentrated on the northwest side. Based on differences in microclimate and soil, it is broadly divided into two major areas: the Aceh region and the Sidikalang region near Lake Toba. Sidikalang is the birthplace of Mandheling coffee and the starting point for many people’s introduction to Sumatran flavors.

The wet-hulling process used in the Sidikalang region is key to shaping the unique character of Mandheling. This method involves removing the outer husk of the beans while they still retain some moisture and before the fruit mucilage and parchment layer are fully removed. This results in its distinctive bold flavor, heavy body, and lingering finish reminiscent of herbs, wood, and caramel. If you want to experience the most authentic Sumatran coffee flavor, Sidikalang Mandheling is a must-try.

For those seeking higher quality and a more balanced cup, consider trying the renowned PWN Golden Mandheling. PWN stands for Perusahaan Negara Widya Makmur, an Indonesian state-owned coffee export company. The selection process for Golden Mandheling is extremely strict: only beans with full shapes and sizes of 18 mesh or above are chosen, and no more than 3 defective beans are allowed per 300g sample of green beans, classifying it as G1 — the highest grade. In addition, the beans undergo three rounds of manual sorting to ensure the final cup offers better brightness, clarity, and sweetness. Due to these high standards, Golden Mandheling is produced in limited quantities, and it’s common in the market to find regular G1 Mandheling being passed off as PWN Golden Mandheling, driving prices even higher.

To confirm that you’ve purchased genuine PWN Golden Mandheling, it’s recommended to ask the seller for the green bean sack and relevant certificates. These documents can also be seen in person at authorized dealers and serve as important proof of authenticity.

When it comes to brewing, the AeroPress is one of the best tools for highlighting the qualities of Golden Mandheling. Below is a set of tested parameters that fully bring out its sweetness and clarity, provided for AeroPress users as a reference:

Coffee dose: 18g
Grind size: 85% passing through a #20 sieve (equivalent to grind setting 9 on the EK43s, medium-fine)
Coffee-to-water ratio: 1:11 (approximately 200ml total water)
Brewing temperature: 87°C
Brewing method: inverted method

Step-by-step guide:

1. Assemble the AeroPress plunger and chamber, push the plunger to about the ④ mark, then place the chamber upside down.
2. Add the ground coffee, then pour an equal amount of hot water (roughly a 1:1 ratio), and start the timer immediately.
3. Use a stirring stick (or spoon) to slowly stir in circles inside the chamber for about 10 seconds to help evenly saturate the coffee grounds.
4. Place the filter cap with pre-inserted paper filter on top of the chamber, ensuring the filter sits flush without any gaps.
5. Invert a receiving cup and place it on top of the AeroPress.
6. After about one minute, flip the entire AeroPress over and slowly press the plunger down to brew and enjoy your coffee.

These parameters balance the richness and subtle details of Golden Mandheling, making it especially suitable for those who prefer low-acid coffee with woody notes and a caramel finish. By mastering grind size and brewing temperature, you can easily use the AeroPress to brew a high-quality cup of Mandheling.

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