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Gene Café CBR-301 Start Here
New to my Gene Café CBR-301 videos? Start here. If you have found my Gene Café CBR-301 videos and are not sure where to begin, this…
Roast 93 and 94 – End-of-Bag Personal Roasts
Ethiopia Karume Natural (247.4g) and REDBER Decaf Colombia Swiss Water (257.5g) These were two end-of-bag personal roasts done to finish what was left in each bag.…
From Seed to Cup – How Coffee Is Shaped
UNDERSTANDING COFFEE / FRUIT & SEED What is a coffee bean? Before coffee is green, roasted, ground or brewed, it is a seed growing inside a…
Roast 17 — Ethiopia Guji Karume (Natural)Espresso Calibration Morning
Espresso Calibration Morning Coffee: Ethiopia Guji KarumeProcess: NaturalBatch: 250gWeight Loss: 14.1%Rest: 8 daysIntent (originally): Not explicitly espresso-focused Context This morning wasn’t supposed to be significant. It…
Roast Notes – After 22 Roasts on the Gene Café CBR-301
Last Updated: February 2026Roasts Included: 22 total (20 standard + 2 sample roasts)Roaster: Gene Café CBR-301Baseline: 250 g | 250 °C | Fan 2 → 3…
Roast 8 – Brazil Topazio, Natural | Upper-bound reference
Coffee: Brazil Topazio, naturalRoaster: Gene Café CBR-301Batch: 250 gSet temperature: 250 °C In: 250 g → Out: 205.4 g (17.8% WL)Total time: 13:23 Why this roast…
When Coffee Words Stop Being Useful
Today I watched a bonus Q&A between Lucia Solis and Roaster Kat, and something in it stayed with me longer than I expected. Not a technique.Not…
Green Coffees Used
Green Coffees Used This page records the green coffees used throughout Coffee | One Roast at a Time. It is not a buying guide or a…
A few places to start
First crack · Cold and warm starts · Water · Coffee pricing · All articles
For a roast record, try its number, coffee name, origin or process. For orientation, visit Start Here. The Roasting path follows Beginner → Intermediate → Advanced; Understanding Coffee lets you explore subjects in any order.