Robusta’s Speed Secret: Why Dark Roasts Need a Finer Grind
⏱ 1 min read The Short Version Robusta’s rapid solubles demand a much finer grind for dark roasts, overriding roast level adjustments to achieve proper extraction. This reveals how bean chemistry, not just roast depth, dictates extraction speed. In This Article Robusta’s Solubles: The Unseen AccelerantRoast Level’s Double-Edged Sword The data speaks volumes: Robusta’s presence in a blend significantly influences extraction speed, often overriding roast level adjustments. A recent session refining Hannoversche Kaffeemanufaktur’s Espresso Furioso demonstrated that Robusta content can dominate extraction behavior, even when roast levels are precisely controlled. Using a dark roast, Arabica/Robusta blend, and drum-roasted Italian style,…