Who he is
Scott Rao is an American coffee author, consultant and roaster — arguably the most cited technical voice in modern specialty coffee. His books The Professional Barista's Handbook, Espresso Extraction, The Coffee Roaster's Companion and The Professional Barista's Handbook are required reading in cafés and roasteries worldwide.
Philosophy
- Even extraction is everything. Channelling is the enemy; uniformity is the goal.
- Measure, don't guess. Refractometers, scales, and data over intuition.
- Roast development matters more than roast colour. Rate-of-Rise (RoR) curves and development time ratio (DTR) define the cup.
- Believes the industry over-romanticises the bean and under-engineers the process.
Notable quotes
"If you're not measuring extraction, you're guessing."
"A good roast is a smooth roast — no flicks, no crashes, no stalls."
"The grinder is more important than the espresso machine."
Signature techniques & gear
- The Rao Spin / WDT — popularised distribution tools and spinning the puck to reduce channelling
- RDT (Ross Droplet Technique) — a spritz of water on beans to kill grind static
- EK43 as the espresso reference grinder
- VST baskets, refractometers (VST / DiFluid), Acaia scales
Known for
- Author of the modern specialty bibles on espresso, brewing and roasting
- Consults for top roasters globally (Sey, George Howell, many others)
- Defining the language around "development time," "RoR," and "extraction yield"