What it actually is
XO is not a variety at all. That is the single most useful thing to know before you buy one. It has no D number and no registration, because it is not a breed. XO is D24 fruit that has been left on the tree longer, until the flesh inside starts to ferment slightly before the fruit drops. It is a handling and ripening method, not a clone.
The base fruit, D24, is one of the oldest clones on Malaysia’s register: “Sultan”, registered on 30 November 1937 from Bukit Merah, Perak. D24 was the benchmark durian for decades before Musang King displaced it. XO takes that familiar fruit and pushes it past normal ripeness, which changes the taste far more than the appearance.
You will sometimes see XO listed as D2. That is wrong. D2 is a separate registered clone called Dato Nina, and it has nothing to do with XO. If a seller puts a D number on an XO label, treat it as a warning sign about the seller. The full clone register is on our durian types page if you want to check a claim.
How to spot it
Because the fruit is D24, you identify it with D24’s markers. There is no separate XO look.
Expect a medium fruit, roughly 1.5 to 2.5 kg. The husk runs light green to greenish brown, and the shell is thinner than many premium clones, so it opens relatively easily. The thorns are fine, sharp and evenly distributed. The reliable tell is at the base: a spine-free brown patch about the size of a 20 cent coin. Stallholders call this the “20 cent sign”. Our guide on how to choose durian covers base and stem checks in more detail.
Inside, the flesh is pale yellow. The difference from standard D24 shows up in texture: XO flesh is softer and wetter, sometimes distinctly watery. If you open a fruit sold as XO and the flesh is firm and dry, it has not been held long enough to earn the name, or it was never left on the tree that long in the first place.
What it tastes like
Fermentation pushes XO firmly to the bitter end of the spectrum. The aroma is strong. The first impression is sweet, then a pronounced bitter, alcoholic finish comes through, often compared to brandy or whisky. That comparison is exactly where the name comes from: XO is borrowed from cognac grading.
Against its parent, standard D24 tastes milder and more balanced, sweet with gentle bitterness. Against Musang King, XO is wetter, looser in texture and more aggressive in the finish, without Musang King’s thick, custardy body.
This is a polarising fruit. Experienced eaters who chase bitterness rate it highly. Most first timers find it too aggressive, and the watery texture puts off people who expect firm, creamy flesh. If you have only ever eaten sweet kampung durian or milder clones, XO is a hard second step.
What to watch for
The naming confusion is the trap here. XO is sold under its own name, under the wrong D2 label, and sometimes simply as “premium D24”, which tells you nothing about how long the fruit was held. Ask the seller directly: is this tree-fermented D24, and how long was it left? A seller who cannot answer is guessing.
The other issue is consistency. Because XO depends on timing rather than genetics, one fruit can be mildly bitter and the next aggressively alcoholic, even off the same tree. The soft, watery texture also means the fruit deteriorates faster once opened, so eat it the day it is opened.
On price, remember the usual arithmetic: published figures put edible flesh at 15 to 30 per cent of whole-fruit weight, so whole-fruit and packed-flesh prices are not comparable. In the current 2026 season, a glut year with prices roughly half of 2025’s, XO should not command a large premium over ordinary D24. If it does, you are paying for the story, not the fruit.
Who it suits
XO suits experienced durian eaters who already know they like bitterness and want more of it. It is not a beginner fruit, and it is a poor choice for converting someone who is durian-curious but uncommitted. Pair it with plainer food: eat it after rice or bread rather than after rich dishes, so the bitter finish reads clean instead of muddled.