How to Roast Decaf Brazil DEC02: F-NAT 0-1200 Recipe
Dialing in Decaf Brazil DEC02 — 12 logged home roasts with real metrics
Brazil · Minas Gerais · Natural · 900-1200m ASL · NY 2/3 MTGB GC · John Burton
Aroma of chocolate, roasted nuts and dried fruits. Flavours of malted chocolate milk and nut brittle. Long Chocolate aftertaste. Low acidity and medium round body.
“Settled after early “decent but want more chocolate” notes — F-NAT 0-1200 @ 3.4 / 120g is the keep recipe.”
Winning batch R-089 · 2026-06-30
Cup quality across 12 attempts
Each point is a roast scored from tasting notes (1 = miss, 5 = dialed in). The series stops at the teal halo — once dialed in, later repeats aren’t scored the same way.
Where the good cups live
Roast level vs batch size. Color = profile family; larger dots = better cups. Notice how quality clusters once batch size moves to 100–120g.
Roast mechanics that stuck
DTR, roast loss, and rate-of-rise across attempts with klog data. Each series is scaled on its own axis so shapes are comparable.
What the data taught us
- 1First logged cup (R-030, F-NAT 0-1200 @ 3.0) was decent but needed more chocolate and less acidity.
- 2Stepping level up into the 3.3–3.6 band on the same F-NAT 0-1200 family is where the chocolate-nutty goal landed.
- 3Settled recipe: F-NAT 0-1200 at level 3.4 / 120g — repeated on R-089, R-100, R-102 with only light tweaks.
- 4Stopped writing cup notes once it was consistently good; later batches are confirmation roasts, not failures.
Want to log a journey like this?
Track profiles, klog metrics, and tasting notes until the cup clicks.