ABCVA™ Coffee Sensory Science Handbook

The Science of Coffee Flavor, Evaluation & Cup Architecture

Author: Alfred Gitau Mwaura
Founder – Kenya Coffee School
Creator – ABCVA™ Coffee Sensory Model

Part I — Foundations of Coffee Sensory Science

Chapter 1: Introduction to Coffee Sensory Science

Topics covered:

• History of coffee tasting
• Evolution of coffee sensory evaluation
• Importance of standardized sensory systems
• The need for a scientific evaluation framework

Approximate length: 10 pages

Chapter 2: Human Sensory Perception

Understanding how humans perceive flavor.

Topics:

• Taste receptors
• Olfactory system
• trigeminal perception
• flavor perception vs taste

Key concept:

Flavor = taste + aroma + mouthfeel + temperature

Approximate length: 15 pages

Chapter 3: Coffee Chemistry Fundamentals

Understanding the chemistry behind coffee flavor.

Topics:

• volatile compounds
• organic acids
• sugars
• lipids
• phenolic compounds

Coffee contains over 800 aromatic compounds.

Approximate length: 20 pages

Part II — Coffee Flavor Formation

Chapter 4: Coffee Plant Biology

Topics:

• coffee species
• genetic variation
• flavor influence of varieties

Key species:

• Arabica
• Robusta

Approximate length: 12 pages

Chapter 5: Influence of Terroir

Topics:

• altitude
• soil chemistry
• climate
• shade

These factors influence sugar accumulation and acidity development.

Approximate length: 15 pages

Chapter 6: Coffee Processing and Flavor Development

Topics:

• washed processing
• natural processing
• honey processing
• anaerobic fermentation

Processing directly affects ester formation and fruitiness.

Approximate length: 18 pages

Chapter 7: Fermentation Science

Topics:

• microbial fermentation
• yeast activity
• bacterial influence

Fermentation produces:

• esters
• alcohols
• acids

These compounds influence complexity.

Approximate length: 15 pages

Part III — Coffee Roasting Science

Chapter 8: Roasting Chemistry

Topics:

• Maillard reaction
• caramelization
• pyrolysis

These reactions generate the core flavor compounds.

Approximate length: 20 pages

Chapter 9: Roast Profiles and Flavor Development

Topics:

• light roast chemistry
• medium roast chemistry
• dark roast chemistry

How roasting alters:

• acidity
• sweetness
• bitterness

Approximate length: 15 pages

Part IV — ABCVA™ Sensory Model

Chapter 10: Introduction to ABCVA™

Topics:

• philosophy of cup architecture
• structural sensory evaluation
• scientific rationale

ABCVA attributes:

• Aroma
• Balance
• Complexity
• Vibrancy
• Aftertaste

Approximate length: 10 pages

Chapter 11: Aroma Analysis

Topics:

• volatile aromatic compounds
• fragrance evaluation
• aroma calibration

Key compounds:

• linalool
• geraniol
• vanillin

Approximate length: 18 pages

Chapter 12: Balance

Topics:

• sweetness vs acidity
• bitterness control
• mouthfeel structure

Balance represents structural harmony.

Approximate length: 15 pages

Chapter 13: Complexity

Topics:

• flavor layering
• interaction of flavor compounds
• temperature influence

High complexity coffees show multiple flavor phases.

Approximate length: 15 pages

Chapter 14: Vibrancy

Topics:

• organic acids
• brightness
• acidity perception

Major acids:

• citric
• malic
• tartaric
• phosphoric

Approximate length: 15 pages

Chapter 15: Aftertaste

Topics:

• flavor persistence
• mouth coating compounds
• lipid influence

Aftertaste reflects cup memory.

Approximate length: 12 pages

Part V — Coffee Flavor Molecule Map (CFMM)

Chapter 16: Introduction to CFMM

Topics:

• concept of molecular flavor mapping
• linking chemistry with sensory descriptors

Approximate length: 12 pages

Chapter 17: Flavor Molecules in Coffee

Topics:

• esters
• aldehydes
• ketones
• pyrazines
• furans

Approximate length: 18 pages

Chapter 18: The Coffee Flavor Molecule Map

Topics:

• visual mapping of flavor families
• molecular origins of flavor notes

Approximate length: 12 pages

Part VI — Coffee Cupping Science

Chapter 19: Professional Cupping Protocol

Topics:

• grinding standards
• water chemistry
• temperature control

Approximate length: 15 pages

Chapter 20: ABCVA™ Cupping Form

Topics:

• scoring methodology
• attribute weighting
• evaluation consistency

Approximate length: 12 pages

Chapter 21: Sensory Calibration

Topics:

• panel calibration
• aroma training
• acidity calibration

Approximate length: 15 pages

Part VII — Coffee Defects and Quality Control

Chapter 22: Green Coffee Defects

Topics:

• insect damage
• broken beans
• fermentation damage

Approximate length: 12 pages

Chapter 23: Sensory Defects

Topics:

• phenolic
• moldy
• baggy
• smoky

Approximate length: 10 pages

Part VIII — Coffee Auctions and Grading

Chapter 24: ABCVA™ Auction Grading System

Topics:

• coffee lot evaluation
• auction grading tiers
• buyer evaluation

Approximate length: 12 pages

Chapter 25: Coffee Quality Certification

Topics:

• ABCVA-CQA certification
• professional cupping standards
• sensory evaluation careers

Approximate length: 10 pages

Part IX — The Future of Coffee Sensory Science

Chapter 26: Coffee Flavor Research

Topics:

• chromatography
• mass spectrometry
• sensory research

Approximate length: 12 pages

Chapter 27: Coffee Education and Global Standards

Topics:

• coffee training programs
• international certification
• sensory education

Approximate length: 10 pages

Appendices

Appendix A

ABCVA™ Flavor Wheel

Appendix B

Coffee Flavor Molecule Map

Appendix C

ABCVA™ Cupping Form

Appendix D

Sensory Calibration Protocol

Estimated Book Length

Total:

~300 pages

Strategic Importance

Publishing this handbook would position Kenya Coffee School as:

• a coffee research institution
• a global training authority
• a sensory science publisher

The book would introduce the ABCVA™ sensory architecture to the world.

“ABCVA™ Coffee Encyclopedia (500+ pages)”