Sweetness
A taste, and in tea usually a faint one — most of what reads as sweet is aroma.
Tea contains very little sugar, and the sweetness a drinker perceives is mostly not sweetness at all. Some of it is genuine: free sugars and amino acids in the leaf contribute a real, low-level sweet taste, and it is more noticeable in shaded Japanese greens and in some white teas. Most of it is aromatic — the honey, caramel and dried-fruit notes elsewhere in this vocabulary are smells that the brain files as sweetness because it has learned that things smelling of honey are sweet. This matters practically. Sweetness that is really aroma cannot be increased by adding leaf, and it disappears when a cup goes cold and the volatiles stop leaving it, which is the ordinary reason a tea that seemed sweet hot reads as flat at room temperature.
Which sense this is
Taste. Registered on the tongue. There are few of these and tea writing uses them loosely — most words that sound like tastes are smells.
Kept on the taste axis even though most reported sweetness in tea is olfactory, because the small genuine component is a taste and because separating the two is the useful thing to say.
Sensory primitive. A single sensation that can be isolated and trained on, independently of what the tea reminds anyone of.
Where it comes from
- Processing step
Shading raises the amino acid content of the leaf relative to the catechins, and shaded Japanese greens are consistently described as sweeter and less bitter than unshaded ones from the same cultivar.
A named production step reliably produces it. A statement about practice, not about chemistry.
Processing: process-shading. Types: type-green-tea.
- Observed, cause unsettled
The perceived sweetness of aged white tea and aged sheng is widely reported and its basis is not established. TeaHQ records the observation and not a mechanism for it.
Reliably observed and not explained. Recorded as unexplained rather than given a mechanism it has not earned.
Processing: process-ageing.
Not to be confused with
- Huigan (Finish and throat) — A Chinese evaluative category: the sweetness that arrives after the swallow, following bitterness rather than replacing it.
What gets said that is not right
That a tea described as sweet contains sugar worth mentioning. It does not; the word is describing an aroma the taster has learned to read as sweet.
Nearby
A tasting note is a comparison, not a measurement. Where the route from leaf to sensation is established it is labelled as such above; where it is not, the page says so rather than supplying a mechanism the descriptor has not earned. See the rest of the vocabulary for how the axes divide up.