How much caffeine is in Taiwan Ruby 18 Sun Moon Lake Tea?

Each 8 oz cup (240ml) serving contains approximately 44 mg of caffeine. For comparison, a standard 8 oz cup of brewed drip coffee contains around 95 mg. Actual content varies with dose, water temperature, and contact time.

What temperature should I use for Taiwan Ruby 18 Sun Moon Lake Tea?

Target 90°C (194°F). Below this range the cup tends toward sourness and thinness from under-extraction; above it, bitterness rises faster than sweetness.

How long should Taiwan Ruby 18 Sun Moon Lake Tea be extracted?

Extract for 3:00-4:00 using Gaiwan, at a ratio of 10g leaves per Liter, prepared at Whole Leaf. Time and ratio move together: a heavier dose generally wants a shorter contact time.

Why does my Taiwan Ruby 18 Sun Moon Lake Tea taste bitter?

Bitterness almost always indicates over-extraction. Shorten the contact time, lower the water temperature slightly, or use less leaf. Change one variable at a time so you can tell which one was responsible.

Who should avoid Taiwan Ruby 18 Sun Moon Lake Tea?

Caffeine-sensitive readers should account for leaf quantity, steep time, and total daily intake. Use individualized guidance for pregnancy, medication interactions, allergies, reflux, or other health concerns. Do not use a beverage as a replacement for prescribed care; preparation strength can change exposure. This is general educational information, not medical advice — consult a qualified healthcare professional about your own circumstances.

Reviewed Aug 2026

Orthodox Black Tea · Sun Moon Lake, Taiwan

Taiwan Ruby 18 Sun Moon Lake Tea

Name: How to Brew Taiwan Ruby 18 Sun Moon Lake Tea
Prep time: 3 min
Cook time: 4 min
Total time: 4 min
Yield: 8 oz cup (240ml)
Cuisine: Sun Moon Lake, Taiwan
Ingredients: 5 g loose-leaf black tea; 100 g filtered water at 90°C

Cinnamon and mint framed by cherry and dark cacao.

Taiwan Ruby 18 Sun Moon Lake Tea is a black tea from Sun Moon Lake, Taiwan. This editorial profile focuses on Ruby 18 cultivar breeding and Sun Moon Lake tea culture, with practical preparation guidance and cautious sensory context for read…

Sensory profile

Comparative scale

sweetnessHigh

acidityModerate

bitternessLow

bodyHigh

aromaVery high

You should taste

How it unfolds

Aroma → Palate → Finish

AromaBefore and as you sip

Mint

pronounced aroma

PalateWhile it is in the mouth

Cherry

clear sweetness

FinishAfter you swallow

clear body

Where it sits

Stronger than 145 of the 345 other drinks in the catalogue, and weaker than 197.

That is 44 mg in a 8 oz cup (240ml) serving — a concentration of 18.3 mg per 100 ml. The scale above ranks whole servings, and servings differ in size, so a larger drink can sit further right while being weaker cup for cup.

CupCura editorial estimate. No public food database has measured this preparation, so this figure is our own and is not independently sourced.

What people say

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Gear for this drink

Fellow Ode Brew Grinder Gen 2

Direct-drive motor with 64mm stainless steel flat burrs engineered specifically for pour-over, drip, and cold brew clarity.

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Sensory profile

You should taste

How it unfolds

Where it sits

What people say

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