1. Introduction: Limitations of Coffee Flavor Measurement and a New Approach

• Professor Christopher Hendon leads the experiment.
• Limitations of existing coffee measurement systems:

  "This system tells you strength, but it doesn't tell you flavor."

• The need to develop a system that measures both strength and flavor simultaneously.
• The attempt to quantify flavor:

  "What if we could put numbers on what we perceive as flavor?"

2. Roasting and the Complexity of Coffee Flavor

• Discussion of coffee's complex flavors and roast levels:

  "What do most people taste? Complexity." "Can people distinguish light roast from dark roast by taste alone?"

• The new system can also measure roast character.
• Even at the same concentration (1.3%), light and dark roasts taste different.

  "The system can now differentiate light from dark at 1.3% concentration. That's a big step forward!"

3. Experiment Setup: Changing Coffee Flavor with Electricity

• Experiment overview:
  • Two cups of instant coffee are prepared
  • One cup receives an electrical treatment; the other remains untouched
  • Both are diluted to the same concentration, then subjected to blind tasting
• Purpose:

  "We'll see if you can tell the difference between the electrically treated coffee and the untreated one."

• This experiment has not yet been published as a paper.

4. The Experiment: How Electrical Treatment Works

• How it works:

  "Each molecule receives one or two electrons from the circuit. By counting electrons, we know how many molecules have reacted."

• Through electrochemical reactions, you can:
  • Destroy unwanted bitter molecules
  • Restore oxidized molecules to freshness

    "In other words, you can reverse aging or remove bad flavors."

• During the experiment, the current changes are explained:

  "At first, there's a lot of current, but as the reaction progresses, it gradually decreases. Stirring brings new molecules to the electrode surface."

5. Blind Tasting: Experiencing the Flavor Change

• Two cups are shuffled so tasters don't know which was treated.
• Reactions after tasting:

  "This one is more bitter." "Can you tell the difference?" "Yes, definitely. It's heavier and more bitter." "On the positive side, I get cherry, dark cherry flavors."

• The coffee's overall character didn't change completely, but parts of it shifted.
• The bitterness was noticeably reduced:

  "Anyone would notice this one is less bitter. It's still not perfect, but much better." "It's 100% robusta coffee, but after electrical treatment, the characteristic robusta taste is greatly reduced."

6. Extending the Experiment to Specialty (Natural) Coffee

• The experiment was also conducted with natural-process espresso.
• Reactions after tasting:

  "It doesn't taste like the same coffee. It's like a completely different coffee." "It became more complex, and the natural character seems to have disappeared. That's amazing."

• Results interpretation:

  "High-quality coffee doesn't necessarily get better. Complexity may actually decrease." "If we could adjust the flavor this way, it would be great if baristas could tailor it to taste."

7. Significance and Possibilities of the Experiment

• Impact of electrical treatment on coffee flavor:
  • Reduced bitterness, highlighted certain positive flavors (cherry, cocoa, etc.)
  • Sometimes reduced complexity
• Practical application potential:

  "With this technology, baristas could adjust coffee to target specific flavors." "It could even make barista skills less necessary."

• Fun and surprise:

  "That was a really fun experiment. Quite impressive." "Wow, you're a genius!"

8. Wrap-Up and Next Steps

• Further experiments and interviews are planned.
• While the underlying principles aren't fully established, the experiment demonstrates the possibility of adjusting coffee flavor with electricity.
• This could signal a new innovation in the coffee industry.

Key Takeaways

• Coffee Flavor Measurement
• Electrochemical Reactions
• Bitterness Reduction
• Distinguishing Roast Levels
• Blind Tasting
• Complexity
• Potential to Replace Barista Skills
• Coffee Innovation

"Anyone would notice this one is less bitter. It's still not perfect, but much better." "It doesn't taste like the same coffee. It's like a completely different coffee." "With this technology, baristas could adjust coffee to target specific flavors." "Wow, you're a genius!"