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Roasting MOC

Coffee roasting transforms green coffee beans into the aromatic, soluble, brewable product through carefully controlled application of heat. The process encompasses the chemical reactions that create flavour compounds, the physical changes within the bean, and the craft decisions that shape how a given green coffee expresses itself in the cup. This MOC maps all roasting knowledge in Coffeepedia across process stages, equipment, profile development, and quality control.

Deep Dives

File Contents
Roasting Basics What roasting is, the six stages of a roast, key variables, roast levels, defects, degassing, and quick-reference temperature/time tables
Roast Levels and Flavor Development The full roast level spectrum, named roast styles, how roast level affects acidity/body/sweetness/aroma, measurement, and matching roast to brew method

Sub-MOCs

MOC Covers
Roasting Methods MOC Equipment types and heat-transfer approaches — drum, air, and hybrid roasters
Flavour Development MOC How flavour compounds form and transform from green coffee through the roast

Topic Map

The Roasting Process

Stages: Drying Phase | Maillard Reaction | First Crack | Development Phase | Second Crack | Cooling Process

Physical changes: Bean Expansion | Density Loss | Oil Migration | Chaff Separation | Moisture Loss

Chemical reactions: Maillard Reaction | Caramelisation | Strecker Degradation | Pyrolysis | Carbon Dioxide Formation | Volatile Compound Creation | Melanoidin Formation

Heat phases: Endothermic Phase | Exothermic Phase | Turning Point

Roast Variables

Primary controls: Charge Temperature | Rate of Rise | Airflow Control | Total Roast Time | Drop Temperature

Heat transfer: Conduction | Convection | Radiation | Heat Transfer Ratio

Profile concepts: Development Time Ratio | Rate of Rise Analysis | Declining Rate Profiles | Front-Loaded Profiles | Back-Loaded Profiles | Crash and Flick

Batch management: Batch Size Impact | Heat Soak | Consecutive Batch Consistency

Roast Levels and Profiles

Light: Light Roast | Cinnamon Roast | New England Roast | Scandinavian Roast

Medium: Medium Roast | American Roast | City Roast | Full City Roast

Dark: Dark Roast | Vienna Roast | French Roast | Italian Roast

By brew method: Filter Roasting | Espresso Roasting | Omni Roasting | Cold Brew Roasting

Roasting Equipment

Roaster types: Drum roasters | Fluid Bed Roasters | Hybrid roasters | Sample roasters | Home Roasters

Components: Gas Burners | Airflow System | Chaff Collector | Cooling Tray | Bean Temperature Probes

Software and monitoring: Artisan Software | Cropster | Thermocouples | Data Logging Software | Agtron scale

Roasting by Coffee Type

By processing: Roasting Washed Coffee | Roasting Natural Coffee | Roasting Honey Coffee | Roasting Anaerobic Coffee

By origin: Roasting Ethiopian Coffee | Roasting Kenyan Coffee | Roasting Colombian Coffee | Roasting Brazilian Coffee | Roasting Indonesian Coffee

By density/altitude: High-Grown Coffee Roasting | Low-Grown Coffee Roasting | Hard Bean Roasting

Specialty types: Roasting and Brewing Peaberry | Decaf Roasting | Espresso Blend Roasting

Profile Development and Quality Control

Profile development: Sample Roasting Workflow | Cupping Roast Samples | Iterative Profile Refinement | Profile Documentation | Profile Replication | Seasonal Adjustments

Quality assessment: Roast Weight Loss | Roast Density | Production Cupping | Roast Defect Identification | Colour vs. Development

Roast defects: Baked Roasts | Scorched Roasts | Tipped Beans | Underdevelopment | Overdevelopment | Quakers

Roasting Science

Thermodynamics: Heat Capacity | Thermal Conductivity | Heat Transfer Coefficient | Reaction Rates | Activation Energy

Advanced chemistry: Acids in Roasting | Volatile Compounds | Melanoidins | Lipid Oxidation | Quinides

Data and analysis: Roast Logging | Statistical Process Control | Roast Curve Mathematics | Predictive Modelling

Business, Safety, and Sustainability

Operations: High-Volume Roasting | Inventory Management | Production Scheduling | Yield Calculation

Safety: Fire Prevention | Ventilation Requirements | Burn Prevention | Personal Protective Equipment

Environmental: Afterburner Systems | Chaff Utilisation | Energy Efficiency | Carbon Footprint

Essential Resources

Books: The Coffee Roaster's Companion (Scott Rao) · Inside the Cup (Willem Boot) · Coffee Roasting: Best Practices (Rob Hoos)

Online: Roast Magazine · SCA Roasting Competency Standards · Artisan Roaster documentation · Cropster learning resources

Part of Coffeepedia — The Coffee Knowledge Vault

This article is part of All-About-Coffee.com - The comprehensive coffee knowledgebase.

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