Self-study lesson
Lesson 3.7: Cupping for Troubleshooting
The learning loop
- Notice: smell or taste slowly before naming.
- Name: write simple words first; refine later.
- Compare: check another cup, stage, or reference.
- Record: write what changed and what stayed stable.
- Repeat: make one small improvement next session.
Troubleshooting uses cupping as diagnosis. You compare what you taste with roast, brew, water, storage, and green coffee clues.
A cup problem may have several causes. The learner's job is to narrow possibilities, not jump to the most dramatic explanation.
Bitterness could be roast level, over-extraction, water, old coffee, grinder fines, or defect. Change one variable and taste again.
From the KoffyKraft notes
Cupping isn't just for describing coffee. It's also a powerful tool for solving problems. In this lesson, we shift our focus from 'how good is this coffee?' to 'what might have gone wrong?' You'll learn how to identify common defects or imbalances, and begin linking what you taste to roasting, processing, or storage issues - without blame or stress.
Objectives
- Recognize common taste defects and what they might suggest
- Practice neutral, diagnostic thinking - not judgment
- Build links between sensory perception and production causes
- Learn how to document your observations constructively
Tools Needed
- 2-3 coffees with known roast flaws or quality differences
- Optional: one coffee with a known defect (e.g., underdeveloped roast, stale bag)
- Spoon, grinder, kettle, timer, notebook
Protocol - Gentle Troubleshooting Cupping
- Taste 2-3 coffees side by side. Don't look for what's good - look for what's unusual.
- Use simple questions: Does it taste hollow? Sharp? Dry? Smoky? Dull?
- For each odd sensation, write a plain-language guess (e.g., 'Could be overroasted').
- Use the troubleshooting table to connect what you taste with possible causes.
- Keep your notes neutral - never 'bad', just 'imbalanced', 'aggressive', or 'faded'.
- Taste again the next day and see if your impression holds.
- Share your diagnosis (if applicable) with a partner or roaster and ask what they think.
Sensory Troubleshooting Table (Examples)
| What You Tasted | Possible Cause | Note Style |
|---|---|---|
| Sour, unripe note | Underdeveloped roast or early First Crack drop | Write: 'Sharp, greenish acidity - could be roast time issue' |
| Dry, woody, flat | Stale coffee or poor storage | Write: 'Faded, lacks clarity - could be age or packaging' |
| Smoky, burnt edge | Overdevelopment or airflow issue | Write: 'Roasty finish, possible overheat in development' |
| Hollow, no body | Fast roast or low density beans | Write: 'Feels light and short - may lack development time' |
Self-Check
- Were you able to describe a defect without using negative words?
- Did any of your guesses match with known causes?
- Do you feel more confident identifying problems without judgment?
Before You Move On
You don't need to become a roaster or green buyer to be a good troubleshooter. You just need to observe clearly, speak gently, and learn from every cup. When you can describe a likely cause and suggest a correction without panic or pride, you're ready to move on.
Practice this way
- Prepare the cups as described in the original notes.
- Before tasting, write the question for this session in one sentence.
- Taste in stages: hot, warm, and cooler. Do not rush to a final answer.
- Use plain language first. Add professional terms only when they help.
- Review your notes after ten minutes and underline what feels repeatable.
Common beginner mistakes
- Changing many variables at once.
- Treating one taste as proof.
- Ignoring the log.
Self-check with answers
1. What is the main skill in this lesson?
Answer: Troubleshooting needs repeat tasting and records.
2. What should you do if your note feels uncertain?
Answer: Change one variable at a time.
3. What makes the observation more reliable?
Answer: Use cupping notes with brew logs, roast logs, and storage information.
Notebook entry
| Prompt | Your note |
|---|---|
| Session question | |
| First impression | |
| Most repeatable observation | |
| One uncertainty | |
| Next session change |
Continue