Coffee | One Roast at a Time

  • Roast 24 – Brazil Santos Natural – Wanted Controlled post-crack development extension

    Brazil Santos Natural – WantedIn: 250g → Out: 211.3g (15.5% WL)Intent: Controlled post-crack development extension Measured Data What Happened Roast 24 was a deliberate development contrast to Roast 23. Crack was more clearly audible in this roast. Development was allowed to progress for approximately 80 seconds post-crack. The roast was executed to plan, though there…

  • Roast 23 – Wanted Santos Arabica (Natural) | Espresso Baseline 1

    17 Feb 2026Brazil Santos Natural – WantedIn: 250g → Out: 212.5g (15.0% WL)Intent: Santos espresso baseline Measured Data What Happened This roast was intended as a clean baseline for Santos natural espresso. The roast progressed normally. Crack was detected but described as individual pops rather than a rolling onset. No instability or obvious anomalies were…

  • Gene Café CBR-301 – Observations After 20 Roasts

    This page documents real, accumulated experience using the Gene Café CBR-301 as a home roaster. It is not a review.It is not a buying guide.It is not a set of recommended profiles. It reflects what has been observed after twenty tracked roasts across washed coffees, naturals, honey process, and small-batch sample runs. All roasts were…

  • 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 was simply an attempt to pull espresso from Roast 17 and see how it behaved under pressure. What followed turned into one of the most important sensory calibration moments…

  • Roast 22 – Guatemala Acatenango, Caturra (Washed) | Lower Structural Target | 15.5% WL

    Date: 15 February 2026Machine: Gene Café CBR-301Batch: 250gSet Temperature: 250°CPreheat: NoCooling Initiated: 12:25 (745 seconds)First Crack (logged): 11:20 (680 seconds)Development Time: 65 seconds (crack to cool)Weight In: 250gWeight Out: 211.25gWeight Loss: 15.5% Context Roast 22 was conducted as a controlled compression test. Previous roasts of this Guatemala Caturra washed (Roasts 18, 20 and 21) repeatedly…

  • Roast 21 – Guatemala Caturra (Washed) | Alignment Attempt

    Roaster: Gene Café CBR-301Batch: 250 gSet Temp: 250°CPreheat: NoneFan: 2 → 3 at 4:27Cooling initiated: 12:51 (771 s)Output: 210.1 gWeight Loss: 16.0%Development (from crack flag): 83 s Intent:Repeat Roast 20 and align structural outcome to Roast 19 (~14.3% WL). Why This Roast Exists Roast 19 (Honduras Catuai Washed) landed at 14.3% weight loss and felt…

  • 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 around ~4 min | No preheat Context This note supports the YouTube video: “22 Roasts on the Gene Café CBR-301” It is not a tutorial.It is not a set…

  • Roast 20 – Guatemala Caturra (Washed) | Washed Central America Contrast

    Roaster: Gene Café CBR-301Batch Size: 250 gSet Temperature: 250°CPreheat: NoneAirflow: Fan 2 → 3 at ~4:00Cooling initiated at: ~13:10 (approx.)Output Weight: 209.7 gWeight Loss: 16.1% Role / Intent:Washed Central America contrast roast. Intended for A/B comparison against Roast 19 (Honduras Catuai Washed). Why This Roast Exists The question behind Roast 20 was simple: Can I…

  • Roast 19 – Honduras Catuai (Washed) | Reset Palate / Washed Baseline

    Gene Café CBR-301 | Active Exhaust Baseline In / Out: 250 g → 214.3 gWeight Loss: 14.3%Set Temp: 250 °CEnd Decision: First crack + 80 secondsCooling: Initiated deliberately at planned stop Why this roast exists After an extended sequence of naturals, this roast was designed as a structural reset. Not a contrast roast.Not a development…

  • Roast 18 – Guatemala Acatenango (Caturra, Washed) – Personal Roast (For a Friend)

    Roaster: Gene Café CBR-301Coffee: Guatemala Acatenango, CaturraProcess: WashedBatch size: 250.1 gEnd weight: 209.9 gWeight loss: 16.1%Set temperature: 250 °CRoast date: 2026-02-10 Intent Personal roast for sharing.Executed within established guardrails with no experimental changes. Roast execution First crack End of roast Notes Status