Control
Mechanically Demucilaged
The baseline — mucilage stripped by machine before microbes can get to work.
Limited pre-orderSecond live tasting — around 11 November 2026
The Fermentation ProjectJames Hoffmann
One Guatemalan coffee, four fermentations — a limited tasting kit you cup along with the world.
The kit
The 2026 Tasting Kit
One clean Guatemalan lot, split four ways in the fermentation tank — everything else held constant. Taste exactly what controlled fermentation does, and doesn't do, to the cup.
What's inside
- 014 × 100 g whole-bean coffees — one per process, roasted identically
- 02The same Guatemalan coffee in every bag — fermentation is the only variable
One lot, four paths
The four coffees
Each bag holds the same lot — the only difference is what happened in the fermentation tank.
Fermented
Wild Fermentation
Naturally occurring microbes run the tank — the traditional route.
Fermented
Lactobacillus-Inoculated
Seeded with lactic acid bacteria — rounder, creamier, dairy-adjacent characters.
Fermented
Saccharomyces-Inoculated
A selected yeast strain dominates — clarity, a repeatable cup, lifted fruit.
Cup along
Cup along, live
The global cupping with James Hoffmann goes ahead on 3 October 2026 and stays on YouTube afterwards. Because kits are shipping later than planned, we're holding a second live tasting around 11 November so you can brew all four coffees and taste them with us in real time. James Hoffmann will be joining; Lucia Solis, the fermentation specialist who designed the four protocols, may join as well. We'll post the exact time and the watch link here closer to the date.
Before you order
The tasting kit ships on its own — it can't be combined with other products in one order. Order your other coffees separately.
Delivery across Indonesia, or free pickup at the roastery in Malang.
Shipping update: kits have not gone out yet. We missed the window we originally gave you, and we're sorry. We're now aiming to ship in the second or third week of October and we're working to get them out as soon as we can. That means kits won't reach you in time for the global cupping on 3 October — so we're holding a second live tasting around 11 November, and we'll post the details here as we have them.