How to Roast Swiss Water Decaf Brazil: F-NAT 0-1200 at 3.4
Data-backed case study for natural-process Swiss Water Decaf Brazil: medium chocolate-nutty goal and the F-NAT corridor that stuck.
BrewedLate Coffee
Coffee Expert
The short answer: for Swiss Water Process Decaf Brazil (natural, Minas Gerais), the keep recipe is F-NAT 0-1200 at level 3.4 / 120g. Level 3.0 was only “decent” and still wanted more chocolate; stepping into the mid-3s on the same family is where the cup stuck — and where tasting notes quietly stopped because it was good.
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.
About this decaf
Swiss Water® decaf from Brazil’s coffee heartland: chocolate, roasted nuts, dried fruit, malted chocolate milk, nut brittle, long chocolate finish, low acidity, medium body. Roast goal: chocolate-nutty medium development — sugars and cocoa without grassy underdevelopment or ashy overdevelopment.
Kaffelogic reminder: higher level numbers are darker. 3.4 is darker than 3.0.
Journey
R-030: decent, not done
First detailed note at F-NAT 0-1200 @ 3.0 / 120g: decent cup, but more chocolate wanted and residual acidity to replace with sweetness.
Climb the level band, stay in family
Later batches stayed almost entirely on F-NAT 0-1200, exploring 3.3–3.6 and occasional load tweaks (including 130–150g experiments). One NCT Filter D detour existed; the settled path returned to F-NAT.
Settled at 3.4
R-089 / R-100 / R-102 at 3.4 / 120g are confirmation roasts. When a home-roast log goes quiet on notes after a clear “want more chocolate” problem statement, that usually means the problem is solved — not that the data stopped mattering.
Keep recipe
| Setting | Value |
|---|---|
| Profile | F-NAT 0-1200 |
| Level | 3.4 |
| Batch | 120g |
| Typical DTR band | ~19–22% on successful mid-band runs |
| Goal in the cup | Chocolate, nut brittle, low acidity, medium body |
Full metrics chart and timeline: Decaf Brazil case study →
What not to do
- Don’t stay forever at a “fine but not chocolate enough” level out of fear of darkness.
- Don’t interpret missing late comments as missing success — confirmation roasts are valid.
- Don’t apply light washed-filter packs if the goal is malted chocolate and body.
- Don’t forget: higher Kaffelogic level = darker roast.
Related reading
- Swiss Water decaf coffee guide
- Decaffeinated coffee benefits
- How to roast Kenya Gatugi peaberry
- Kaffelogic Nano 7 profiles
- Where to buy green coffee beans
- Data page: /roast-logs/decaf-brazil-dec02
Track every roast, improve every batch
BrewedLate helps home roasters log green coffee inventory, roast batches, Kaffelogic curves, and get AI recommendations — all in one web-based tool.
How to roast Swiss Water decaf Brazil on a Kaffelogic Nano
Keep recipe from a 12-roast log for natural-process Decaf Brazil DEC02
Load 120g green
F-Series style load for stable development.
Select F-NAT 0-1200 at level 3.4
Medium-dark on the Kaffelogic scale for chocolate and nut brittle without ash.
Develop through first crack for sweetness
Goal is malted chocolate and nut notes — not light tea-like acidity.
Rest and brew for chocolate
Judge for chocolate milk, nut brittle, low acidity, medium body.
Repeat, don’t chase
Once the cup is consistently good, log confirmations rather than reinventing the profile every batch.
Frequently Asked Questions
What is the best Kaffelogic profile for Swiss Water decaf Brazil?
Should decaf be roasted differently from caffeinated Brazil?
What roast level for chocolate-nutty decaf Brazil?
Why are there few tasting notes late in the log?
What DTR works for this decaf?
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