coffee society journal — roasting
Roaster size shapes the cup. Industrial machines roast hundreds of kilos per batch and are engineered for throughput and uniformity — which pushes roasts darker, faster, and more generic. Small batch machines roast a few kilos at a time with precise heat control, letting the roaster write a custom profile for each lot and adjust it week to week. Neither is "cheating" — they're built for different goals: one for scale, one for expression.
01what a roaster actually does
Every roaster is a heat-transfer machine: a rotating drum (or fluid air bed) moving energy into beans through conduction, convection, and radiation. The roaster's craft is the curve — how fast heat rises, when the beans crack, how long flavors develop after. Change the curve and you change the cup: the same Ethiopian can read floral and tea-like or heavy and cocoa depending entirely on the profile.
02what batch size changes
The honest version: industrial roasting is impressive engineering, and for a consistent dark blend at national scale it wins on cost every time. What it can't do is treat an 85-point, 60-pound lot of Pink Bourbon as an individual — profile it, taste it, tweak it, and sell it fresh within days of roasting. That's structurally a small-machine job.
03why we roast the way we do
- Small seasonal lots — 50–100 lbs per variety per quarter, each with its own roast profile matched to fruity & juicy or chocolatey & nutty.
- Roasted to order — your bag is roasted after you order it and ships within 24 hours, roast date printed on.
- Cupped continuously — every lot is Q graded 85+ going in, and we taste our own roasts against that standard coming out.
04common questions
It's better at expression and freshness, not at price or uniformity. If you want the same cup every day for a decade, industrial delivers. If you want to taste what a specific farm's harvest did this year, small batch is the only way there.
Batch size, days from roast to delivery, whether profiles are per-lot or one-size, and whether you can cup together. The answers tell you if you're buying a partner or a warehouse.
No — it describes equipment, not skill. Pair it with a Q grade, a roast date, and a named farm and it starts meaning something.
taste the difference a small drum makes
Every Coffee Society lot gets its own profile, roasted to order in Berkeley, CA and shipped within 24 hours. Cafes: we're the roasting program you don't have to build.
coffee subscriptions rotating single-origin partner with uscoffee society · specialty micro roaster · berkeley, ca · est. 2023