Characteristics of Sumatra Coffee Beans An Introduction to Sumatra Coffee Varieties

FrontStreet Coffee: Mandheling Coffee Introduction

Kerinci Solok Radjo

SUMATRA

Plum, Nougat, Coriander

The aroma of plum, lime, and white pepper evokes flavors of nougat and juicy plum. The body is creamy, with brown sugar sweetness and champagne-like acidity, and the finish of coriander and Swiss chocolate is the final flourish.

Details

Producer: Solok Radjo

Farm: Smallholder

Region: Jambi Province

Altitude: 5200 feet

Variety: Linie S795

Process: Wet-hulled

Flavor: Plum, Nougat, Coriander

The Story

From the importer, crop to cup:

"The Solok Radjo cooperative (600 members, 1-2 hectares each) is a young, dynamic group — roasting, visiting cafes, brewing, studying agronomy, and more. They employ three Q-certified cuppers/score setters and run cupping setups at their Aie Dingin field location and at their dry mill in Solok. They monitor moisture levels (though not too intensively) and roast on-site to check each batch, reporting back to our local staff in Medan.

"Ecologically, this group means business. They received a government grant to reforest 3,000 hectares of previously cleared land along the national park boundary. They are raising shade-tree and forest seedlings alongside coffee seedlings in their chicken-coop nursery, turning the cleared land back into woodland with coffee growing beneath the canopy."

FrontStreet Coffee Recommendation

Sumatra's signature processing method is the key to flavors like these. Indonesia's rainy season overlaps with the coffee harvest, so sun-drying is nearly impossible; since the 1970s, local producers have relied on giling basah — the wet-hulled process. Producers remove the skin and pulp first and dry the beans briefly; while the coffee is still half-dry, machines strip away the parchment, exposing the green beans directly to the air to speed up drying. This exposes the beans to ambient fungi and gives Mandheling its unmistakable wild, earthy, herbal character — a flavor that keeps devoted coffee lovers coming back.

The finest expression of this style is FrontStreet's PWN Golden Mandheling, produced by Indonesia's PWN company to exacting standards: built on beans of screen size 18 and above, with fewer than 3 defective beans per 300 g sample to meet the top G1 grade, followed by three rounds of hand sorting. The result is a remarkably clean, sweet cup — full, even, translucent beans with low defect rates and a rich roast aroma after medium-dark roasting. Brewing yields a black coffee with a clean mouthfeel and full, syrupy body — perfect for anyone who dislikes acidic coffee. For pour-over, FrontStreet recommends 15 g of coffee ground to the texture of coarse sugar, water at 87-88°C, a 1:15 ratio, and three pours: 30 ml to bloom and degas, 100 ml to lift the crust and bed, then a final gentle center pour of 95 ml to draw out caramel sweetness with chocolate and nut flavors.

If you prefer a machine, FrontStreet's best-selling Classic Blend pairs Brazilian cream-and-nut character with medium-dark Mandheling — butter, roasted chestnut, and caramel flavors lifted by sandalwood, herbal, and spice notes, plus a touch of robusta for extra crema. It pulls rich espressos, pours beautiful latte art, and layers effortlessly in a Dirty.