Dragon Fruit Flavor

Dragon fruit, or pitaya, is the fruit of climbing cacti in the genus Hylocereus. Three kinds reach US shelves: pink skin with white flesh, pink skin with magenta flesh, and yellow skin with white flesh. All three have the same soft flesh and small black seeds, and none of them tastes of much.

What it actually tastes like

Ripe dragon fruit is gently sweet and watery, with almost no sourness. People usually compare it to kiwi or pear, partly because of the crunchy seeds. The magenta-fleshed and yellow-skinned kinds are usually described as sweeter than the white-fleshed pink one. An underripe fruit tastes of very little at all.

The main aroma note is green and grassy. In white-fleshed pitaya, researchers traced the difference between "mild grassy" and "strong grassy" cultivars mostly to two compounds, hexanal and 1-hexanol, the same green notes you smell in cut grass.¹ That is a long way from what people picture when they order a pink dragon fruit drink.

Why dragon fruit flavor is built

There is not much in the fruit to extract or copy. So a dragon fruit flavor is mostly a design decision. A flavor house will usually start from a kiwi, pear or melon base, add green notes, and often put a berry or tropical top on it so it reads as something. Two suppliers can both sell you "dragon fruit" and send you flavors that taste nothing alike.

This is why the fruit almost always appears in a pair. Mango dragon fruit, dragon fruit lime and dragon fruit passion fruit are common because the partner supplies the flavor and the dragon fruit supplies the color and the name.

It also affects your label. If little of the flavor actually comes from dragon fruit, that changes how you can name it. See natural flavor vs WONF.

The color does the selling

Red-fleshed pitaya gets its magenta from betacyanins, part of the betalain family that also colors beets. Beet red is mostly betanin. Pitaya carries betanin plus two related forms, phyllocactin and hylocerenin.² In the US, juice used as a color falls under the fruit juice color listing.⁴

Betalains behave differently from the anthocyanins that color ube. They do not swing from red to blue as pH changes. Their weak points are heat, light and oxygen.

Working with it

• Decide what dragon fruit means before you brief. Kiwi-pear, melon or berry-led are all defensible. Pick one and test it against the color.
• Let the partner fruit carry the taste. Mango is the most common pairing. Lime and passion fruit add the acid the fruit lacks.
• Do not judge the flavor in a clear sample. People taste a pale or white version as weaker, even at the same dose.
• If you want a tropical with a real aroma identity, look at lychee, which has the floral character dragon fruit lacks.