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Article · Thursday, September 10, 2026

Specialty coffee · Worth knowing

One thing happening in the world of Specialty coffee today, written for an enthusiast — not a beginner. Skip celebrity gossip. Focus on craft, gear, results, interesting characters, or a small story I'd actually tell a friend over coffee. Quality over quantity.

By Marius BongartsOther67 editions
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Specialty coffee · Worth knowing
Thursday, September 10, 2026
Specialty coffee · Worth knowing

Hoffmann's fermentation kit ships, global tasting October 3rd

1 min read

The Fermentation Project Kit

Fermentation finally has a standardized tasting protocol.

James Hoffmann and SOLO Brewing are shipping 280 limited kits—four 100g coffees isolating fermentation as the only variable: washed baseline, wild yeast, controlled yeast, and lactobacillus [Quelle: SOLO Brewing]. A global cupping on October 3rd, 2026 will gather tasters worldwide to document how these microbial choices shift acidity, body, and texture across roasting and brewing methods. This scales what shipped in September from a one-off experiment into a distributed dataset.

Order before stock runs.

Why This Matters Now

Protocol replaces intuition in specialty coffee.

SOLO Brewing built their reputation on processed coffees—Hop Hour, Cherry Bomb, Metacafeína—each pushing a different fermentation frontier. This kit standardizes what roasters and enthusiasts have been chasing anecdotally: proof that fermentation's flavor impact is reproducible and measurable across geographies and prep methods. When hundreds of people cup the same four coffees on the same day, the noise clears and the signal emerges [Quelle: SOLO Brewing].

Watch roasters use these results to guide their sourcing.

Sources
The Fermentation Project Kit — 4 × 100g Collector's Cans
The Fermentation Project Kit — 4 × 100g Collector's Cans
12 hours ago ... ... coffee — to explore, document, and celebrate the science of fermentation in coffee processing. The project brings together roasters from around the world ...
solobrewing.pt
AI Summary

The Fermentation Project is a global initiative by James Hoffmann designed to explore and document the science of fermentation in coffee processing. SOLO Brewing is participating by offering a limited kit of four coffees sourced through the project, each representing distinct fermentation approaches: a baseline washed coffee, wild yeast fermentation, controlled yeast inoculation, and lactobacillus fermentation. The coffees—selected to showcase four points on the fermentation spectrum—will be cupped globally on October 3rd, 2026, to understand how roasting, geography, and preparation affect the same fermented lots. SOLO Brewing's participation reflects their long-standing focus on processed coffees, including their fermented releases like Hop Hour (co-fermented with IPA yeast), Cherry Bomb (co-fermented with red cherry), and Metacafeína (fermented with lactobacillus for 720 hours). The kit invites enthusiasts to taste these coffees side by side and explore how different fermentation methods transform coffee's flavor, acidity, and texture.

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