The lead

The entire coffee research bench runs on about one salary

Last issue covered the 1957 brewing chart finally getting rebuilt. This issue is about who paid for that, and the number is smaller than you would guess.

On 18 September the Specialty Coffee Association endowed a $1 million fellowship in coffee science at the UC Davis Coffee Center. An endowment pays out its earnings and keeps the principal, so the working figure is about 4 percent a year. That comes to roughly $40,000 annually, which supports one graduate researcher at a time. The rest of the earnings get reinvested so the fund grows.

That is good news. It is also the scale of the thing. The UC Davis Coffee Center is the first academic facility in the United States dedicated entirely to coffee, and the newest permanent money behind it funds one student.

The director is William D. Ristenpart, Child-Whitaker Endowed Professor of Chemical Engineering, and the same man who led the sensory work that replaced the old brewing control chart. His framing of the gift is about supply, not discovery. "One of the longstanding missions of the UC Davis Coffee Center has been to establish and nurture a strong academic talent pipeline in support of the coffee industry." SCA chief executive Yannis Apostolopoulos put it as investing in people rather than projects. The endowment gives preference to international scholars from coffee-producing regions.

Nine days later the Coffee Center published profiles of three of its current graduate researchers, which is the more useful document. It tells you what is actually on the bench.

Alice Dien, biological systems engineering, working under Irwin Donis-Gonzalez, is testing whether a smartphone photograph can replicate laboratory standards for coffee quality assessment, and where the variability between measurement methods comes from. Her work feeds Roastpic, a tool aimed at roasters who cannot justify lab instruments.

Willian Klippel Huber, same lab, is using computer vision and machine learning to detect and classify green coffee defects, and is building an automated defect detection machine to replace hand grading.

Daniel Schoonbrood, food science and technology, working under Julien Delarue, is asking whether a person's coffee habits, knowledge and experience change their ability to detect defects in a brewed cup.

Look at those three together and none of them is really a coffee problem. They are metrology problems. Can a cheap sensor match the reference instrument. Can the inspection be automated without losing accuracy. And does the operator's training change the reading. I have spent thirty-two years around calibration programs and that last question is always the one that bites. You can have a perfectly good instrument and a perfectly good procedure and still get two different numbers off two different technicians.

Schoonbrood's question is the one a drinker should care about. If experience changes what a taster can detect, then the reference standard is not sitting in the cup. It is sitting in the person holding the cup. That has consequences for every tasting note you have ever read on a bag, including mine.

What to do with it: nothing this week, but change how you weight advice. When somebody hands you a rule about coffee, ask when it was measured, by whom, and how many people were in the panel. A surprising amount of what circulates has never been tested at all, and the group that does the testing is small enough to fit in one hallway.

Sources: UC Davis College of Engineering, 18 Sep 2026 · Give to UC Davis · UC Davis Coffee Center, 27 Sep 2026

Worth trying

Drink it black for seven days

A genome-wide study out of McGill University looked at whether liking bitter food is written into you. Tongzhu Meng and Daiva Nielsen, School of Human Nutrition, ran it across 125,578 UK Biobank participants and validated it in a second group of 8,176. They found 46 genetic variants tied to preferences across eleven bitter foods, and two variants associated with how much coffee a person drinks per day regardless of how they prepared it.

Then they said the part that matters. The effect sizes are small and inconsistent, and sociocultural, economic and health considerations likely play a larger role than the genetics do. In plain terms, there is a nudge in your wiring and then there is everything else, and everything else is bigger.

So "I am just not a black coffee person" is mostly a habit claim wearing a biology costume. Habits respond to a ramp. Palates do too.

What to do with it: do not quit cream and sugar on Monday. Taper it over a week, one variable at a time, the way you would walk a setpoint down instead of yanking it. The tool below runs the schedule. Keep the coffee, the grind and the ratio identical all week so the only thing changing is what you are adding.

Sources: The Journal of Nutrition, Meng and Nielsen · Barista Magazine, 18 Sep 2026

Worth ignoring

"Robusta will save coffee from climate change"

You have seen this one. Arabica is fragile, the planet is warming, robusta is the tough cousin, so robusta is the future. Dr Aaron P. Davis, senior research leader of crops and global change at the Royal Botanic Gardens, Kew, reviewed more than fifty climate studies for a paper in Sustainable Development and called it an internet myth that got going about a decade ago.

His correction is one sentence. "Robusta is more heat-tolerant than arabica, but it's drought-intolerant." Heat and water are two separate loads. Passing one test does not get you out of the other.

Fresh Cup went back over it on 25 September and added the other side. Dr Fábio DaMatta, full professor of plant physiology at the Universidade Federal de Viçosa, argues heat tolerance and drought tolerance are distinct characteristics that the binary framing flattens. He has a case. Robusta in Rondônia produced about 120 bags per hectare through the 2023 to 2024 drought against a Brazilian average near 28.9. That ground is irrigated and intensively managed, which is Davis's argument in reverse. The yield came from the management, not the species.

Robusta is 43 percent of global coffee trade, and Brazil and Vietnam ship about 65 percent of it. Not a footnote.

What to do with it: stop treating robusta as a rescue plan or a cheap filler. Judge the cup in front of you, and be skeptical of single-variety answers to multi-variable problems.

Sources: Fresh Cup, 25 Sep 2026 · Reuters

The craft · interactive

Where is your bag on the clock

Roast date is the only number on a bag that tells you anything about today. Pick how the coffee is stored and count the days since it was roasted.

The craft · interactive

The seven day taper

Pick how you take it now. The schedule walks the additives down as a percentage of your normal pour, sugar first because it moves faster, cream second because it carries the body you will miss.

From the roast room

The thing that stuck with me in the UC Davis material was Schoonbrood's question. Does the person doing the tasting change the result. In facilities work that is not a research question, it is Tuesday. Two technicians, one gauge, two readings, and the whole argument is about which one to trust.

Coffee has the same problem and mostly pretends it does not. A tasting note on a bag reads like a measurement. It is closer to one person's reading on an uncalibrated instrument. Mine included, which is why what goes on a Blue Granite bag stays short and stays behind the roast log.

Every bag out of here carries a roast date. Use the clock above on it. If a bag you bought somewhere else does not have one, that is the answer to a different question.

Sean O'Brien
Founder · Blue Granite Roasting Co. · Lexington, SC