Common Pour Over Mistakes
Most bad cups come from a short list of recurring errors — and nearly all have quick fixes once you can name them. This note is the field guide to the frequent stumbles. For a symptom-first diagnostic walkthrough, pair it with the Pour Over Troubleshooting Guide.
#The Usual Suspects ⚠️
Work down this list before blaming the beans. Each links to the technique that fixes it.
| # | Mistake | Result | Quick fix |
|---|---|---|---|
| 1 | Guessing weights | Inconsistent strength | Use a scale; set a ratio |
| 2 | Stale or wrong coffee | Flat, lifeless cup | Buy fresh; rest 4–14 days |
| 3 | Bad grind | Sour or bitter | Dial in grind |
| 4 | Blade grinder | Uneven, fines-heavy | Use a burr grinder |
| 5 | Skipping the bloom | Uneven, under-extracted | Bloom 30–45 s |
| 6 | Wrong water temp | Sour (cold) / bitter (hot) | 90–96 °C target |
| 7 | Pouring on the walls | Bypass | Keep pours inside the bed |
| 8 | Over- or under-agitating | Harsh or weak | Match agitation to grind |
| 9 | Ignoring water quality | Dull, scaly | Use good water |
#The Big Three Explained
Grind is the master dial. A sour, thin cup usually means too coarse; a bitter, draggy one means too fine. Before you touch anything else, get the grind right and confirm your grinder gives a uniform particle spread.
Skipping the bloom is the most common beginner error. Without it, escaping CO₂ pushes water away from dry grounds and you get patchy extraction. Thirty seconds fixes it — see The Bloom.
Wrong water temperature sabotages good technique silently. Brew with off-the-boil water that's too cool and the cup sours; brew too hot with a light roast you may scorch it. Aim for the right temperature for your roast.
#Subtler Mistakes
- Inconsistent pours between brews — you can't dial in a moving target.
- Ignoring drawdown — a fast or stalled drain is telling you something.
- Chasing a timer instead of taste — see Brew Time and Total Contact Time.
- Reusing or not rinsing filters inconsistently — see Pre-Wetting the Filter.
The thread running through all of these is consistency: change one variable at a time, keep everything else fixed, and taste deliberately. That discipline turns mistakes into a feedback loop instead of a mystery.
#Continue Reading
- Pour Over Troubleshooting Guide — start from the symptom, work to the cause.
- Under-Extraction and Over-Extraction — the taste signatures to recognize.
- Dialing In Grind Size — the highest-leverage fix of all.
- The Bloom — undo the single most common beginner error.