One of the questions we hear most from customers trying blue tea for the first time is whether it contains caffeine. It's an understandable question—the word 'tea' usually makes people think of black tea or green tea, both of which naturally contain caffeine.
The good news is that pure blue tea is naturally caffeine-free.
Blue tea is made from the dried flowers of the butterfly pea plant (Clitoria ternatea), not from the tea plant (Camellia sinensis). Because of that, it doesn't contain the naturally occurring caffeine found in traditional teas.
If you're looking for a colourful drink to enjoy in the evening or simply want to reduce your caffeine intake, blue tea is an excellent choice.
What Exactly Is Blue Tea?
Unlike black tea or green tea, blue tea isn't made from tea leaves at all. It's brewed using the vibrant blue flowers of the butterfly pea plant, a climbing vine that has been enjoyed across Southeast Asia for generations. The flowers create a naturally deep blue infusion that turns purple with a squeeze of lemon, making every cup as visually striking as it is refreshing.
Its flavour is light, smooth and mildly floral, making it a versatile herbal infusion that can be enjoyed on its own or blended with ingredients such as lemongrass, ginger or mint.
Why Doesn't Blue Tea Contain Caffeine?
Caffeine occurs naturally in the leaves of the Camellia sinensis plant, which is used to produce black, green, white and oolong teas. Butterfly pea flowers belong to a completely different plant species, so they don't naturally produce caffeine.
That's why a cup of pure blue tea contains no caffeine, making it suitable for anyone looking for a caffeine-free alternative to traditional tea.
Can Blue Tea Ever Contain Caffeine?
Yes—but only if it's blended with caffeinated ingredients. Some blue tea blends include green tea or black tea to create different flavour profiles. If you're specifically avoiding caffeine, check the ingredient list and choose a product made with 100% butterfly pea flowers.
Blue Tea vs Green Tea
Although both drinks are popular among health-conscious tea lovers, there's one major difference. Green tea naturally contains caffeine, usually between 20 and 45 mg per cup depending on how it's brewed. Pure blue tea contains none.
If you're looking for a gentle drink to enjoy later in the day, blue tea is often the better choice.
Can You Drink Blue Tea Before Bed?
Many people enjoy blue tea as part of their evening routine because it won't add caffeine to their day. While everyone responds differently to herbal drinks, choosing a caffeine-free infusion is often a simple way to wind down after a busy day.
How to Brew Blue Tea
Brewing a great cup of blue tea couldn't be simpler.
1. Place one Blue Tea bag into your favourite mug or teapot.
2. Pour over freshly boiled water (around 95–100°C).
3. Allow the tea to steep for 4–5 minutes, depending on how strong you like the flavour.
4. Remove the tea bag and enjoy as it is, or add a slice of lemon to watch the vibrant blue infusion transform into a beautiful shade of purple.
For a refreshing iced drink, brew the tea as above, let it cool, then pour it over ice. A touch of honey, fresh mint or a squeeze of lemon makes a delicious summer drink. Dehing Tea's Blue Tea is packed in biodegradable tea bags containing 100% pure butterfly pea flowers, making it an easy and convenient way to enjoy this naturally caffeine-free herbal infusion.
Final Thoughts
If you're trying to cut back on caffeine without giving up the ritual of a warm cup of tea, blue tea is well worth exploring. Its naturally vibrant colour, delicate floral taste and caffeine-free nature make it a refreshing option for any time of day. Whether served hot or over ice, it's a simple way to enjoy something a little different.