Four words to help you along
Acidity, bitterness, dryness and roast notes describe different impressions. Acidity can recall citrus freshness, bitterness unsweetened cocoa. Dryness or astringency mainly means a puckering mouthfeel. Roast notes belong to aroma and flavour description. These impressions can occur together; distinguishing them helps you make a targeted adjustment.
World Coffee Research's sensory lexicon treats flavour, aroma and texture as distinguishable characteristics. You do not need to memorise its terminology. The useful idea is to name more precisely what actually bothers you.
Describe before fixing
If you only write “bad”, it remains unclear whether an adjustment helped. Instead, note something like “sharp at first, then empty”, “intense and cocoa-like” or “dry in the aftertaste”. These observations name the distracting impression and make the next sample comparable.
Pleasant fruity acidity can be part of the bean. If you generally prefer a less fruity style, a different roast may be the best solution. You do not have to like a coffee just because its description sounds particularly detailed.
A small comparison
- First taste the coffee without milk or sweetener at a comfortable temperature.
- Note the first impression and aftertaste separately.
- Dilute a small portion with a little water and check whether only the intensity bothered you.
- Judge another sample after it has cooled briefly. Avoid hasty conclusions from a scalding-hot sip.
Sour does not automatically mean under-extracted
A fast, thin, sharply acidic espresso can indicate insufficient or uneven extraction. But the same description of acidity can also fit a deliberately fruity bean. So use quantities, time, flow and bean information together.
Water can also change perceived acidity. If your recipe suddenly tastes different after a change of location, the grinder is not the only suspect. Try comparing water before changing every setting.
Bitter does not automatically mean too long
A dark roast has different characteristics from a light one. Old residue can also taste unpleasant. Only once cleanliness and the beans have been checked is it worth deliberately changing beverage quantity or grind. A rough aftertaste can be related to uneven flow and will not necessarily disappear simply by shortening the shot.
Build a personal vocabulary
You are welcome to describe a coffee as rounded, juicy or cosy. What matters is that you mean roughly the same thing in your comparisons. A small personal vocabulary is more practical than reciting a flavour wheel. Good tasting begins with attention, not an exam.