From green bean to repeatable roast profile.
This course teaches the decisions behind roasting rather than a single fixed recipe. Actual machine settings vary by roaster design, batch size, ambient conditions and coffee, so the training focuses on variables, relationships, sensory outcomes and safe production discipline.
Roasting Fundamentals
What roasting changes physically and chemically, why roast profiles matter, and how time, temperature and energy interact.
Understanding Green Coffee
Density, moisture, process, screen size, variety and origin as inputs that influence heat response and roast strategy.
Roaster Anatomy & Heat Transfer
Drum, burners/heaters, airflow, exhaust, probes and the practical roles of conduction, convection and radiation.
Charge, Turning Point & Early Energy
Why starting conditions influence momentum, how to avoid scorching/tipping, and why machine-specific baselines matter.
Drying & Maillard Management
How progression through drying and browning influences sweetness, body, clarity and aromatic complexity.
First Crack & Development
Use first crack as a milestone, calculate development time ratio, and understand why ratio is a diagnostic—not a universal target.
Gas, Airflow & Rate-of-Rise Thinking
Learn how energy and exhaust decisions affect momentum, smoke removal and the shape of the roast curve.
Roast Degree & Brewing Intent
Relate lighter, medium and darker expressions to acidity, sweetness, body, solubility and milk compatibility.
Roast Defects & Troubleshooting
Recognize underdevelopment, baking, scorching, tipping and excessive roastiness, then connect defects to controllable causes.
Sample Roasting, Cupping & Profile Approval
Use controlled samples, sensory evaluation and benchmark comparisons to approve or revise a target profile.
Production Scaling & Quality Control
Preserve cup intent when batch size changes; monitor roast loss, color, time, first crack, drop conditions and sensory QC.
Roast Logging, AI & Continuous Improvement
Build a traceable roast record, compare production deviations, detect trends and use AI as an analytical assistant—not a substitute for roaster judgment.
What a production roast log should capture.
| Variable | Why it matters | What to monitor |
|---|---|---|
| Green coffee | Defines the raw-material starting point. | Lot, process, moisture, density, age, intake QC. |
| Batch / charge | Changes thermal load and early momentum. | Batch mass, charge condition, environmental temperature. |
| Energy / gas | Primary driver of heat input. | Major power changes and their timing. |
| Airflow | Affects convection and exhaust of smoke/chaff. | Airflow stages and exhaust behavior. |
| First crack | Important development reference. | Start time/temperature and sensory consistency. |
| Drop | Defines endpoint of the roast. | Total time, drop temperature, color and cooling. |
| QC | Confirms the profile in the cup. | Roast loss, color, cupping result, defect notes. |
Common roast outcomes to recognize.
Underdeveloped
Can present as raw, grassy, cereal-like, sharply acidic or difficult to extract. Review development and overall energy progression.
Baked / flat
Often associated with low momentum or an overly prolonged roast. The cup may lose vibrancy, sweetness and aromatic definition.
Scorched / tipped
Localized surface damage can come from excessive early heat, hot contact surfaces or aggressive energy for the coffee and batch.
Test the roasting logic.
What is the most useful way to treat first crack?
Which statement best describes profile approval?
Apply the course in Roasting Lab.
Choose a target profile, adjust batch, charge temperature, power, airflow, first crack and drop. The simulator scores profile fit and predicts a simplified sensory direction.