Coffee Roasting: The Chemistry of Turning Seeds into Gold

~60 min · 15 stations

Start reading — Station 01

Conductor

The Conductor

We’re pulling back the curtain on the Maillard reactions and thermal kinetics that turn a bland, green seed into a complex sensory event. Board this path if you want to master the physics of flavor.

What you will learn

Read the stations in any order. Sign in to take the quizzes and earn Miles.

FOUNDATION

Establishes the core vocabulary and essential context you need before going further.

Discover why coffee beans lose significant mass while simultaneously doubling in their physical volume.

Station 01: The Great Shrinking and Swelling Act

Identify the biological characteristics of raw coffee seeds before the application of intense heat.

Station 02: The Green Bean Foundation

Master the methods of moving thermal energy into the dense core of a coffee bean.

Station 03: Heat Transfer Dynamics

CORE CONCEPTS

Unpacks the ideas and principles that the subject is built on.

Unpack the chemical process responsible for browning and the creation of complex aromatic compounds.

Station 04: The Maillard Reaction

Examine how high-heat sugar breakdown shapes the sweetness and bitterness profile of coffee.

Station 05: Caramelization Milestones

Analyze the release of carbon dioxide trapped inside the cellular structure after the roast concludes.

Station 06: Degassing Mechanisms

Recognize the audible signal of rapid water evaporation and structural expansion during roasting.

Station 07: The First Crack

MECHANICS

Examines how things actually work — the processes, rules, and systems in action.

Synthesize heat transfer and chemical reactions into a coherent roasting curve.

Station 08: Thermodynamic Profiles

Evaluate the importance of removing debris and managing airflow for a clean-tasting cup.

Station 09: Chaff and Airflow

Investigate the breakdown of cellular walls and the transition toward darker roast profiles.

Station 10: The Second Crack

APPLICATION

Puts knowledge to use through real-world scenarios and practical problems.

Categorize coffee profiles based on their physical appearance and chemical development.

Station 11: Roast Level Taxonomy

Assess the impact of rapid cooling on arresting the chemical reactions within the bean.

Station 12: Cooling Velocity

Troubleshoot common roasting errors like tipping, scorching, or uneven development.

Station 13: Defect Identification

SYNTHESIS

Connects everything together and explores broader implications and open questions.

Document the relationship between input variables and the final sensory experience in the cup.

Station 14: The Roaster's Log

Integrate all mechanical and chemical knowledge to execute a signature roast project.

Station 15: Mastering the Roast Profile

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General Public / 9th GradeAI Generated · gemini-3.1-flash-lite

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