Iced butterfly pea flower latte with oat milk and vanilla. Caffeine-free, antioxidant-rich, and the layered blue ombre color is completely natural.
This is the drink that makes people reach for their phones before they reach for a straw. Steep dried butterfly pea flowers in hot water, let it cool, pour it over oat milk and ice. The blue layers over the white like something from a movie. Squeeze lemon in and the whole thing turns purple. Zero caffeine, zero artificial color. Just anthocyanin pigments from a flower that’s been growing wild across Southeast Asia for thousands of years.
At a Glance
| Detail | Info |
|---|---|
| Prep time | 10 minutes |
| Total time | 15 minutes (plus cooling) |
| Servings | 1 |
| Difficulty | Easy |
| Key ingredient | Dried butterfly pea flowers |
| Best for | Morning ritual, afternoon pick-me-up, impressing guests |
| Flavor profile | Mild, creamy, lightly sweet with vanilla |
| Caffeine | None |
How This Is Different from Our Lemonade
We already published a butterfly pea flower lemonade that uses these same flowers in a sparkling citrus drink. That one is tart and refreshing. This is creamy and smooth, closer to an iced latte from a coffee shop except there is no coffee and no caffeine. The lemonade is for parties. The latte is for your morning.
Some tea shops sell butterfly pea powder as “blue matcha,” which is clever marketing. It is not matcha. There is no caffeine, no L-theanine, no catechins. What it does have is anthocyanins, the same class of antioxidants found in blueberries, but in concentrations that turn water the color of a sapphire.
What You Will Need
- 1 tablespoon dried butterfly pea flowers
- 1 cup boiling water
- 1 cup cold oat milk
- 1 tablespoon maple syrup
- 1/4 teaspoon vanilla extract
- Ice cubes
- Optional: lemon wedge for color change
On the flowers: Whole dried flowers produce a cleaner, more vibrant blue than butterfly pea powder. Powder works but tends to give a slightly murkier result and is harder to strain completely. Oh, How Civilized and Raks Kitchen both prefer whole flowers. Find them at Asian grocery stores or online tea shops.
On the milk: Oat milk is the consensus across recipe developers. Its creamy body and natural sweetness pair well with the mild, almost neutral flavor of butterfly pea tea. Pick Up Limes uses oat milk with a pinch of cardamom and ginger, which adds a warm spice note if you want more complexity.
On the vanilla: Not required, but 1/4 teaspoon adds a bakery-like warmth that rounds out the drink. Without it the latte is pleasant but a little plain, since butterfly pea flowers taste like almost nothing on their own.
How to Make It
Put 1 tablespoon of dried butterfly pea flowers in a heatproof cup. Pour 1 cup of boiling water over them. You will see the water turn blue almost immediately.
Steep for 5 minutes with the cup covered. The liquid should be a deep, saturated indigo. Going past 5 minutes is fine up to about 10, but beyond that you can get a faintly vegetal taste.
Strain through a fine mesh sieve and let the tea cool completely. You can speed this up by pouring it into a shallow dish, or just make it the night before and refrigerate. The blue holds its color for at least 24 hours in the fridge.
When you are ready to build the latte, stir 1 tablespoon of maple syrup and 1/4 teaspoon of vanilla into the cold oat milk.
Fill a tall, clear glass three-quarters full with ice. Clear glass matters here. You want to see the layers.
Pour the sweetened oat milk over the ice.
Take the cold blue tea and pour it slowly over the back of a spoon resting against the inside of the glass. The blue tea is lighter than milk and will float on top, creating a gradient that goes from white at the bottom to deep blue at the top.
Serve with a straw. Stir when you are ready to drink, and the whole thing turns a pale, shimmering lavender.
The Color-Change Trick
Squeeze a wedge of lemon into the glass and the blue shifts to purple. Add more lemon and it pushes toward magenta. This is the same anthocyanin chemistry behind our butterfly pea flower lemonade, and in a latte the effect is even more dramatic because you are watching the color change move through the milk.
The pigments responsible are called ternatins, a subclass of anthocyanins. At neutral pH (the tea by itself), they reflect blue light. Drop the pH with citric acid from lemon and the molecular structure shifts, reflecting purple to pink wavelengths instead. It is the same reason red cabbage juice changes color in a science fair experiment.
For the cocktail version of this color trick, our butterfly pea cocktail with gin and lemon uses the same flowers with Hendrick’s gin.
Variations
Lavender butterfly pea latte: Replace the maple syrup with 1 tablespoon of lavender simple syrup. The floral notes layer naturally and the color becomes even more purple.
Spiced blue latte: Add a pinch of ground cardamom and a thin slice of fresh ginger to the steeping water along with the flowers. This is the Pick Up Limes approach and it adds a warm complexity that makes the drink feel more like a chai.
Coconut blue latte: Swap oat milk for full-fat coconut milk. Richer body, tropical undertone, and the white is even more opaque, which makes the blue layer pop harder.
Before You Start
Make the blue tea ahead. It keeps in the fridge for up to 3 days without losing color. Brew a batch on Sunday and you have iced blue lattes all week. This is the single biggest time-saver with this recipe.
Use clear glassware. The entire appeal is visual. A ceramic mug defeats the purpose. Tall clear glasses show off the layers best.
Butterfly pea flowers are caffeine-free. This makes the latte a genuine alternative for people who cannot or do not want caffeine. It looks like an iced coffee drink, it has the ritual of making a latte, and it delivers zero stimulants. The antioxidants from the anthocyanins are a bonus.
Store dried flowers properly. Airtight container, away from light and heat. They keep for two to three years when stored well.
Common Questions
Does the butterfly pea flower latte taste like flowers?
Barely. The flowers contribute almost no flavor on their own. What you taste is the oat milk, the maple syrup, and the vanilla. The flowers are there for the color and the anthocyanins. If you want more flavor, add the cardamom-ginger variation.
Where do I buy butterfly pea flowers?
Asian grocery stores (often in the tea aisle), Amazon, or specialty tea shops online. Buy whole dried flowers, not powder. A small bag lasts a long time since you only need a tablespoon per serving.
Can I make this hot?
Yes, but it defeats the layered visual since hot milk and hot tea mix immediately. If you want it warm, steep the flowers, strain, stir in sweetener and vanilla, and top with steamed milk. You will get a uniform blue-purple drink instead of layers.
Is “blue matcha” the same as butterfly pea flower powder?
Same flower, different marketing. Some brands sell butterfly pea powder as “blue matcha” to tap into the matcha trend. But it has nothing in common with actual matcha beyond being a colored powder you whisk into a drink. No caffeine, no L-theanine, no catechins. It is butterfly pea flower powder.
Camille writes about botanical drinks, herbal cocktails, and the old plant wisdom that makes them work. Most days you'll find her in the garden or the kitchen, turning herbs into something worth sipping.
