Reviews
Part of Loose leaf tea comparison: match shape to your brew
Four sessions, one ladder: tasting loose leaf tea properly
A four-session parameter ladder for learning one loose leaf tea properly, why temperature outruns time in the cup, and what to write down each time.
What to take away
- Learn one tea properly before learning many. Three sessions on one leaf beats one session on three.
- Temperature does more than time in the early part of the curve, and there is measurement behind that.
- Past about ten minutes at high temperature the chemistry of the infusion changes shape, not just strength.
- Color is the sensory attribute that tracks the chemistry most reliably, which makes it a useful first thing to watch.
The parameter ladder
Take one tea and run it four ways over four days. Change one number each time, keep a written record, and do not skip to conclusions.
Four-session tea parameter ladder
Session 1
- Dose
- 3 g
- Water
- 200 mL
- Temp
- 85 C
- Time
- 3 min
- Isolates
- baseline
Session 2
- Dose
- 3 g
- Water
- 200 mL
- Temp
- 95 C
- Time
- 3 min
- Isolates
- temperature
Session 3
- Dose
- 3 g
- Water
- 200 mL
- Temp
- 85 C
- Time
- 6 min
- Isolates
- time
Session 4
- Dose
- 5 g
- Water
- 200 mL
- Temp
- 85 C
- Time
- 2 min
- Isolates
- leaf + time
Session / Dose
- 1
- 3 g / 200 mL · 85 C · 3 min
- 2
- 3 g / 200 mL · 95 C · 3 min
- 3
- 3 g / 200 mL · 85 C · 6 min
- 4
- 5 g / 200 mL · 85 C · 2 min
Four cups and you know more about that tea than most people know about any tea. Session two isolates temperature, session three isolates time, and session four shows what more leaf and less time does, the principle behind short-steep brewing.
It is also the first format a service window rules out, as the constraints that pick a cafe list show.
Temperature moves things faster than time
A study brewed green tea infusions at 60 C and 95 C for 5 to 300 minutes. It found measured antioxidant capacity depended more on temperature than on time, and metabolic profiles changed significantly with both.
Temperature outruns time
60 C and 95 C | brewing temperatures tested
5 to 300 minutes | steep times tested
10 minutes at 95 C | peak total catechin level
Temperature mattered more than time | antioxidant capacity
Total catechin level peaked at 95 C after 10 minutes. After that, epi-forms fell and non-epi forms rose as the catechins epimerized.
The practical reading is that a hot short steep and a cool long steep are not interchangeable. Consumer testing on seven Taiwanese specialty teas found the cold end separating out as its own thing rather than a weaker version. They produce different infusions, not weaker and stronger versions of the same one.
Color is the attribute that tracks best
A large study of Turkish black tea prepared 2,688 cups across teapot type, brewing method, spout condition, time and water temperature, scored by seven trained panelists.
Color was the most responsive sensory attribute, significantly affected by teapot type and water temperature. Astringency and flavor were not significantly influenced by the conditions tested. Brewing water temperature was the most influential factor on the chemical measures.
For a beginner that is useful permission. Watching the color of the liquor and learning what it predicts is a real skill, not a shortcut, and it develops faster than a vocabulary for aroma.
What to write down
- The four numbersgrams, milliliters, degrees, minutes.
- Liquor color, in plain words.
- Bitterness 0 to 5 and astringency 0 to 5, separately.
- One line on aroma. Two words is enough.
- Whether you would drink a second cup.
That last line is the most honest measure most people have, and it is the one that predicts what you buy again. The wider structure of a proper comparison is in how to build a tasting flight around tea tasting ideas.
After the ladder
Once you know one tea across four settings, buy a second tea of the same style from a different seller. Run the same ladder.
Now differences come from the teas, not your sessions. At that point tasting starts shaping purchasing decisions, covered in how to choose loose leaf tea without buying twice.
Common questions
Do I need a thermometer?
Something that tells you temperature, yes. A variable kettle is easiest. Boiling water left to stand for two minutes lands near 90 C in most kitchens, which is a workable stopgap.
What if all four sessions taste the same?
Then either the differences are too small for the tea, or your dose is too low to show them. Repeat session four with more leaf.
Should I spit or swallow?
Swallow, unless you are tasting many samples. Some of what tea does happens in the finish, and you lose that if you spit.
How long until this stops feeling like homework?
Usually about a month. After that the numbers become habit and you only write down the surprises.
