My tea goes cold before I finish it

In short

Heat leaves through the vessel, the surface and the air, and small thin vessels lose it fastest. This matters beyond comfort: roasted and dark teas need sustained temperature to open, so a cooling vessel under-extracts as well as disappointing.

Likely causes, in order

Most likely first. Answer the question under each one before moving on — several of these look alike in the cup and are told apart only by what was done to the leaf.

1. 1. Vessels were not pre-warmed

   Technique

   Check: Did you warm the pot, pitcher and cups before brewing?

   Fix: Rinse everything with hot water and discard it. A cold porcelain pot takes a substantial amount of heat out of the first infusion, which is why gongfu practice warms every vessel in the chain.

2. 2. A thin or wide vessel

   Equipment

   Check: Is the pot thin-walled porcelain or glass, and is the cup wide and shallow?

   Fix: Clay holds heat markedly better than porcelain, and porcelain better than glass. For roasted oolong and dark tea this is the practical argument for a clay pot rather than a traditional one.

3. 3. Too many vessels between pot and mouth

   Technique

   Check: Does the tea go pot, pitcher, cup — each of them cold?

   Fix: Every transfer costs heat. Warm the pitcher too, or pour straight to the cups when only one person is drinking.

4. 4. Water below boiling for a tea that wanted it

   Temperature

   Check: Is this a black, roasted oolong or dark tea brewed off the boil because you read that boiling water ruins tea?

   Fix: That advice is aimed at green and delicate white tea and gets over-applied. These categories want water at or very near boiling and lose little by starting hot.

5. 5. A large mug in a cold room

   Equipment

   Check: Is the mug 400 ml or more, with a wide open surface?

   Fix: Surface area drives cooling. A lid, a smaller cup, or brewing in two rounds keeps the tea drinkable far longer than reheating does.

Tea types this applies to

• Oolong
• Dark tea and pu-erh
• Black tea

Brewing methods this applies to

• Gongfu brewing (gaiwan) — A high-leaf, low-volume, many-infusions approach: a great deal of leaf in a small vessel, steeped for seconds at a time and poured off completely, repeatedly.
• Gongfu brewing (Yixing pot) — The same short-steep, high-leaf approach as gaiwan gongfu, carried out in a small unglazed clay pot that seasons over time and is dedicated to one tea.
• Western brewing (teapot or mug) — A small amount of leaf in a large volume of water, steeped once for a few minutes and then strained off. The approach most English-speaking drinkers already know, and the one most teas sold in the West are made for.

Related problems

Sharing a cause category, a tea type or a brewing method with this one.

• My gaiwan is too hot to hold — The rim and lid become uncomfortable within seconds, the pour is rushed, and tea ends up on the tray.
• My tea is weak since I moved somewhere high — The same tea, the same dose and the same timer produce a thin, under-developed cup, and the water is boiling — visibly and vigorously — before it goes in.
• Every infusion in my gongfu session tastes the same — The cups are pleasant and interchangeable, with none of the change from steep to steep the method is supposed to show.
• My clay pot has changed how the tea tastes — A tea that tasted right in porcelain comes out muted, differently scented, or carrying something that was not in the leaf.
• My first infusion is always the worst one — The opening cup is thin, dusty or flat, and the second is markedly better — consistently, across different teas.

Sources