Butterfly Pea Flower
Butterfly Pea Flower
Clitoria ternatea
Also Known as Anchan · Naturally Caffeine-Free · Color-Shifting With Citrus
Drop a handful of dried blossoms into hot water and the water answers immediately. Clear liquid deepens into a color you don’t expect from a kitchen ingredient — somewhere between sapphire and midnight, arriving in under a minute. That reaction is the whole introduction to butterfly pea flower: no long steep, no waiting, no guesswork required to understand why people fall for it.
This is Clitoria ternatea, a climbing vine flower grown across tropical Asia and dried for its intensely blue petals. For generations it has been used to color rice, tint desserts, and brew a naturally caffeine-free tea that shifts color again the instant citrus touches it. It doesn’t ask much of the person using it, and it rewards curiosity almost instantly — which is part of why it has quietly become one of the most requested botanicals for home entertaining.
What Is Butterfly Pea Flower?
Butterfly pea flower is the dried blossom of Clitoria ternatea, a fast-growing, twining vine in the pea family. In the garden, the plant looks the part of a relative to peas and beans — slender tendrils, compound leaves, and pods that follow the flowers. But it’s the blossom itself that draws attention: a single, deep-blue, trumpet-shaped petal that unfurls with a pale yellow-green throat, said to resemble a butterfly’s wing when it opens.
Once harvested, the flowers are dried whole and used almost entirely for their color rather than their taste. That’s an unusual role for a botanical to play. Most ingredients earn their place in a dish through flavor; butterfly pea flower earns its place almost entirely through color, working more like a natural pigment than a seasoning. Steeped in hot water, it releases anthocyanins — the same broad family of plant pigments responsible for the color of blueberries and red cabbage — at a concentration high enough to turn an entire pot of water a saturated, unmistakable blue.
History & Growing Regions
Butterfly pea flower has been part of daily life across tropical Asia for centuries, long before it found an audience overseas. In Thailand, the flower is known as anchan, and the tea brewed from it — nam dok anchan — has been a familiar refreshment for generations, often served cold with a touch of honey and lime. In Malaysia and Indonesia, the same flower gives nasi kerabu its striking blue-tinted rice, and Peranakan, or Nyonya, kitchens have long used it to dye the layers of traditional kuih and glutinous rice desserts without a trace of synthetic coloring.
In India, the flower is called aparajita and holds a place in cultural and household tradition that predates its culinary popularity abroad. The plant itself is believed to have originated somewhere across South and Southeast Asia, and today it’s cultivated widely throughout Thailand, Vietnam, Malaysia, and India, where the climate suits its vining habit and the demand for its flowers remains steady.
The same blue pigment that colors a cup of anchan tea has recently drawn attention from food scientists well beyond Southeast Asia. Butterfly pea flower extract has been evaluated and approved in the United States as a natural coloring alternative to synthetic blue dyes, as candy and beverage makers look for plant-based ways to achieve the same shade.
Flavor & Aroma
Steeped on its own, butterfly pea flower is quiet. The aroma is soft and green, with a faint vegetal note somewhere between hay and fresh leaves, and barely any sweetness. The flavor follows the same restraint: mildly earthy, lightly woody, and never bitter, but also never assertive. It won’t compete with anything you pair it with.
That’s precisely the point. Butterfly pea flower is chosen for what it does to a glass, not for what it does to the palate. It’s a canvas, not a flavor statement — and that makes it unusually easy to build around, since honey, citrus, mint, or a splash of coconut milk can shape the taste however you like while the color does the rest of the work.
It’s a canvas, not a flavor statement.
Across the region where it grows, butterfly pea flower has always been used to color food before it was ever used to flavor it. Thai households steep it into iced tea. Malaysian and Indonesian cooks use it to dye glutinous rice a soft, even blue for nasi kerabu and festival rice dishes. Peranakan bakers work it into layered kuih, giving desserts their signature blue-and-white bands without any artificial dye. In parts of India, the flower has long been grown as a garden and household plant, tied to seasonal and cultural traditions. What ties these traditions together is restraint: the flower was rarely the star of a dish. It was the quiet colorist working in the background, turning ordinary rice, drinks, and desserts into something visually memorable.
Butterfly pea flower found a second life once home bartenders and bakers outside Asia discovered its color-shifting trick. A splash of lemon or lime turns a glass from deep blue to violet to pink in seconds, a bit of kitchen theater that needs no special equipment — just an acid and a stir. That single property is behind the color-changing lemonades, lattes, and cocktails that have become popular for entertaining and photographing alike. It has also become a favored natural dye for bakers and mixologists who want a true blue without reaching for artificial coloring: blue-tinted pasta dough, naturally hued icing, and gin cocktails that change character as they’re stirred are all common modern applications. The flower brings almost no flavor of its own to any of these, which is exactly why it works so well in so many different kitchens.
Ways to Enjoy Butterfly Pea Flower
The simplest way to enjoy butterfly pea flower is still a cup of tea, hot or over ice, with honey and a slice of citrus stirred in at the end so you can watch the color shift happen in your own glass. Beyond that, it’s a versatile ingredient for entertaining.
Tea & Infusions — Brew it on its own, or blend it with other botanicals for a layered infusion. Serve it hot for a calm evening pour or over ice for something more casual.
Cocktails & Mocktails — Use a strong butterfly pea flower brew as a base for gin cocktails, spritzes, or non-alcoholic drinks. Add the citrus at the table so guests can watch the color transform.
Baking & Desserts — Steep the flowers into milk, cream, or simple syrup to naturally tint frosting, custards, and glutinous rice desserts a soft, even blue.
Entertaining & Presentation — Freeze a strong brew into ice cubes for drinks that shift color as they melt, or set out a small pitcher of the tea alongside citrus wedges and let guests mix their own color.
Getting Started
Getting started with butterfly pea flower takes almost no equipment. Use about eight to ten dried flowers per cup of water just off the boil, and steep for four to six minutes. The longer it steeps, the deeper the blue becomes, so adjust to taste and preference rather than following a strict rule.
Strain out the flowers before serving. From there, sweeten with honey or simple syrup if you like, and add a squeeze of lemon or lime right before drinking to see the color shift from blue toward violet and pink. It’s a small, satisfying ritual the first time, and an easy one to repeat.
Pairings & Combinations
Look for deep, saturated indigo-blue petals with minimal browning or fading, whole intact flowers rather than crushed fragments or excessive dust, and a light, clean, faintly grassy aroma with no mustiness. Premium butterfly pea flower should be free of stems and debris, and sourced specifically for culinary steeping and cooking rather than decorative use.
Store dried butterfly pea flowers in an airtight container, away from direct light, heat, and moisture. A cool, dark pantry shelf is ideal. Properly stored, the flowers hold their color and brewing strength for many months, though like any dried botanical, they’re at their best when used within a year.
Frequently Asked Questions
Does butterfly pea flower taste like tea?
Not quite. It's milder and less tannic than black or green tea, with a soft, faintly earthy character rather than a bold tea flavor.
Is it caffeinated?
No. Butterfly pea flower is naturally caffeine-free, making it a good option for an evening pour.
Why does the color change?
The blue pigment responds to pH. Adding an acid, like lemon or lime juice, shifts the color from blue toward violet and pink.
Can I use it in baking?
Yes. It's commonly steeped into milk, cream, or syrup to naturally tint frostings, custards, and rice dishes.
How strong should I brew it?
Start with eight to ten flowers per cup of hot water and steep four to six minutes, then adjust the amount to reach your preferred depth of color and flavor.
Butterfly pea flower is at its best when it becomes part of the moment, not just the drink. Picture this: a small gathering on a warm evening, a glass pitcher of deep blue tea sitting on the table beside a bowl of lime wedges. As each guest stirs in a splash of lime, their glass slowly shifts from blue to violet to a soft, dusty pink, right in front of them. There’s a pause, a little surprise, maybe a photo taken before the first sip — a quiet signal that this drink was made for noticing, not just for drinking.
Beyond entertaining, it’s a natural fit for gifting: a small jar of the dried flowers paired with a few citrus slices makes a simple, visually striking gift for anyone curious about trying something new. It also works well folded into everyday rituals — a quiet cup brewed on a Sunday morning, no occasion required.
We’re drawn to ingredients that teach people something the moment they try them, and butterfly pea flower does that better than almost anything else we carry. Watching a glass of tea change color in your own hands is the kind of small, memorable experience we hope every ingredient in our collection can offer — something worth discovering, and worth sharing with someone else.
