Sumatra Mandheling, Indonesia

Mandheling — named for the Mandailing people of North Sumatra rather than a place — refers to the heavy-bodied coffees grown around Lake Toba and the Gayo and Lintong highlands between roughly 900 and 1,500 metres. Their hallmark is the regional wet-hulling method, 'giling basah,' in which parchment is removed at high moisture content, giving Sumatran coffee its characteristic deep green-blue beans and distinctive cup: full, syrupy body, very low acidity, and earthy, cedar, herbal, and dark-chocolate notes. Mostly Typica-descended landraces and rust-resistant Catimor/Ateng, grown by smallholders, Mandheling is one of the most recognisable and polarising flavour profiles in coffee.

At a glance

• Altitude: 900–1500 masl
• Typical varieties: Typica, Catimor, Ateng
• Common processes: Wet-hulled (Giling Basah)
• Harvest: 9, 10, 11, 12

Climate

Humid equatorial climate with year-round rainfall driving wet-hulled processing.

Soil & terroir

Fertile volcanic soils around Lake Toba.