Exposes dried green coffee to monsoon humidity in ventilated coastal warehouses, echoing old sailing-ship voyages.
Monsooning exposes already-dried arabica or robusta green coffee to monsoon humidity in well-ventilated coastal warehouses, June to September over about 12 to 16 weeks, with repeated spreading, raking and turning. The beans swell to roughly double their size and turn pale gold, lose most of their acidity and brew heavy-bodied with earthy, nutty, spiced notes. The process is traced to the long sailing-ship voyages from India to Europe. Monsooned Malabar has Geographical Indication protection, awarded in 2008 according to one source.
How it worksAlready-dried green coffee, arabica or robusta, is exposed to moisture-laden monsoon winds in well-ventilated warehouses, repeatedly spread, raked and turned, so the beans absorb moisture, swell and turn pale gold.
Step by step
- 01
Start from dry-processed, hulled coffee at about 12% moisture.
- 02
Spread it on warehouse floors in layers roughly 10-15 cm deep with daily raking. Moisture rises to about 15-16% over 15-25 days.
- 03
Pack it loosely in half-filled, unstitched gunny bags, reopened and turned periodically through the season.
- 04
Polish and grade after the monsoon, arabica as AAA, AA, A or Triage.
Timing · About 12-16 weeks, June to September
History
The process is traced to the British Raj, when wooden ships carried coffee from India around the Cape of Good Hope to Europe over about six months. Humidity and sea winds changed the beans from green to a paler yellow. When faster steamships shortened the voyage, the beans lost that depth, and a process was developed to replicate the conditions on India's southwest coast during the monsoon. Monsooned Malabar has protected status under India's Geographical Indications of Goods Act, awarded in 2008 according to one source.
Field notes
- i
Beans swell to roughly double their original size.
- ii
Arabica lots are graded AAA, AA, A and Triage, and robusta AA and Triage, per one source.
Our notes on Monsooned are still being checked against their sources, so for now this page shows only the facts we can stand behind.
What can go wrong
- Lower-grade lots can contain up to about 40% partially monsooned beans, per a reference cited by one source, and musty or fermented notes are a risk.
In the cup, according to guides
- AcidityLessBeans lose most of their original acidity, giving a practically neutral pH profile.
- BodyMoreThe brew is described as heavy-bodied, with earthy, nutty and spiced character.
Common in
At the same stage
Sources · 2 Every sentence here was checked against a source we read. Taste notes are what guides describe, not promises about your bag. Last revised 2026-09-30.
- Monsooned Malabar · Wikimedia Foundation
- What is Monsooned Malabar Coffee? Process, Flavor & Grades · Indian Coffee Beans