The Science of Coffee The Science of Coffee

Coffee Quality, Part 1: The birth of specialty coffee flavours

Dec 8, 2025 · 23m

Summary

Host James Harper explores the history of coffee quality standards, triggered by the SCA’s recent overhaul of the Q grading system. He traces the origins of the 2004 cupping form to pioneers like Erna Knutzen and George Howell, who defined specialty coffee by its distinct flavors, such as sweetness and acidity, in opposition to commodity blends. The episode examines how this American-centric preference became a global industry standard, setting the stage for a deeper critique of whose tastes define "quality."

Topics discussed

SCA announces major changes to the Q grading system The shift from the old Q era to the new CVA system Sponsor segment: WMF automatic espresso machines Erna Knutzen and the origins of the specialty coffee movement Erna's discovery of distinctive flavors in Sumatra Mandheling Specialty coffee defined in opposition to commodity coffee George Howell on sweetness, acidity, and clean cup Creating a common language: The 2004 cupping form How the Q system standardized global coffee quality
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