Why Does Tea Brewed in a Teapot Taste Astringent, and How Can You Prevent It?

The most common reason tea brewed in a teapot tastes astringent is that the leaves remain in contact with the water for too long. Tannins in the tea leaves enter the water during the first few minutes and provide flavor, but when brewing exceeds 15–20 minutes, those same tannins turn into a bitter, throat-drying taste. Another common reason is pouring boiling water directly over the tea in the upper teapot; very hot water extracts tannins quickly and in large amounts, so the tea may taste astringent even if the steeping time is short.

How long should tea be brewed?

For quality black tea, heat the upper teapot with steam from the boiling water below and steep for 8–10 minutes; this gives the tea enough color and aroma without letting the tannins turn bitter. If the brewed tea will sit above the lower pot for a long time, separate it from the water below and strain out the leaves, then dilute with hot water as needed. Otherwise, the tea in the upper pot continues brewing and becomes very astringent over the course of hours.

How does water temperature affect astringency?

Water poured into the upper teapot should not be at a full boil; let it sit for a few seconds after boiling. Water poured at exactly 100°C / 212°F extracts tannins aggressively and may produce an astringent result even with a short steep. Brewing the same amount of tea with slightly cooler water gives a milder flavor and makes steeping time easier to control.

Can the amount and quality of tea affect astringency?

When too much tea is put in the pot, more tannins enter the water in the same amount of time; for this reason, two or three 5 ml measures of tea are often enough for a full pot of water, and more may increase astringency. Broken or dusty tea releases tannins into the water faster than whole-leaf tea, so steep it for less time.

Can overly astringent tea be fixed?

Tea that tastes astringent can be softened by diluting it with a little hot water; this dilutes the tannins and noticeably reduces bitterness. Adding milk or lemon may also mask the astringency, but the main solution is to adjust the steeping time and water temperature next time. If tea that has darkened while sitting at the bottom of the pot for a long time is diluted to the same strength, the flavor balance may be affected; in that case, preparing a fresh pot gives a better result.

Do the same rules apply to green tea?

Green tea is much more sensitive than black tea when it comes to tannins; steeping it in water above 80–85°C / 175–185°F may make it taste astringent very quickly. Limit green tea steeping to 2–3 minutes; using the 8–10 minute time recommended for black tea will almost always produce an astringent result.

What material should a teapot be made of?

Porcelain or glass teapots lose heat more slowly than metal ones and prevent sudden temperature drops during steeping; this helps tannins release more evenly. Metal teapots may leave a slight metallic taste with some types of tea, so porcelain or glass is recommended for daily use.

Quick summary

To keep tea from tasting astringent, limit steeping to 8–10 minutes and pour water over the leaves a few seconds after it reaches a boil, not at a full boil. The amount and quality of the tea also affect astringency; overly astringent tea can be partly corrected by diluting it with hot water.