Passion Fruit, Mangosteen, Rambutan: How to Pick and Eat Them
Wrinkled, hairy and rock-hard: would you pay supermarket prices for any of that? Those are exactly the signs that passion fruit, rambutan and mangosteen are ready to eat, and it’s why so many people pick the wrong one. Here’s how to pick passion fruit that’s sweet, how to open a mangosteen without staining your shirt, what part of a rambutan you never eat, and our honest view on whether each is worth the price next to guava, mango and jamun.
In brief
- Passion fruit: ripe when wrinkled and heavy; eat the pulp and seeds, not the rind
- Mangosteen: deep purple, rind gives slightly when squeezed; eat the white segments
- Rambutan: bright red with fresh hairs; eat the flesh, never the seed
- Where from: mostly imported from Thailand, Vietnam and Malaysia; small crops in south and north-east India
- Verdict: lovely to try, not better for you than local fruit
Prefer to listen? This post as a 6 min video · Video page with transcript
How to pick passion fruit (and why wrinkly is good)
Passion fruit is the one fruit where a smooth, shiny skin is the bad sign. A smooth one was picked early. It’s sour. A wrinkled one has lost a little water through the rind while the pulp inside got sweeter, and that’s the one you want.
- Look for wrinkles. Lightly to well wrinkled is ripe. Deeply shrivelled and dry means it’s getting old.
- Weigh it. Heavy for its size means lots of juicy pulp; a light one is often half empty.
- Shake it. You should feel the pulp move slightly inside.
- Check the colour. Purple types should be deep purple, yellow types a full golden yellow, with no green.
- Reject mould and cracks. White or grey fuzz, wet soft patches or split skin means it’s spoiling.
Bought smooth ones? Leave them on the counter for 3 to 5 days, out of the sun, until they wrinkle. Then they go in the fridge, where they keep for about a week.
How to open and eat passion fruit
Cut it in half across the middle with a sharp knife over a bowl. Scoop out the yellow, jelly-covered seeds with a teaspoon. That’s it. The crunchy black seeds are edible, and most people eat them with the pulp; if you want just the juice, press the pulp through a sieve with the back of a spoon. Leave the white pith and the rind. They’re bitter, and the rind, especially of unripe fruit, contains compounds that can release cyanide, so it isn’t food.
The taste is sharp, sweet and hugely perfumed, a bit like a mix of guava, pineapple and citrus. A little goes a long way. One fruit gives about a tablespoon or two of pulp, around 17 kcal, and roughly 2 g of fibre from those seeds.
You can freeze the pulp in an ice-cube tray. Pop a cube into nimbu pani or a sharbat and it melts into flavour.
Mangosteen: how to choose and open it
Mangosteen looks like a small purple ball wearing a green cap. Inside are 4 to 8 snowy white segments, soft and juicy, with a taste somewhere between lychee, peach and a little tangy pineapple. Many people rate it one of the best-tasting fruits in the world. It’s also one of the most disappointing if you buy an old one.
- Colour: deep purple to almost black-purple. Green or pinkish ones are under-ripe.
- Squeeze gently: the rind should give a little under your thumb. Rock-hard means old and dried out. The rind hardens as it ages, and the segments inside turn brown and bitter.
- The cap: fresh and green, not black and dry.
- Yellow sticky spots: a few blobs of dried yellow sap on the skin are normal.
To open one, hold it and press firmly with both thumbs until the rind cracks, then pull the halves apart. Or score a shallow line around the middle with a knife, just through the rind and not into the fruit, and twist off the top like a lid. Lift out the segments with a fork. Wear something old. Mangosteen rind juice stains cloth purple and it rarely washes out.
The bigger segments may hold a seed. It’s bitter and not eaten. Just spit it out.
Rambutan: the hairy lychee
Rambutan comes from the Malay word rambut, meaning hair, and you can see why. Under the red, soft-spiked skin there’s a juicy, translucent white fruit that tastes a lot like lychee, slightly less perfumed and a touch creamier.
- Colour: bright red, or yellow-orange in some varieties. Mostly green means unripe.
- The hairs: fresh and flexible, red or green-tipped. Black, brittle, dried hairs mean it’s a few days old, though the fruit may still be fine inside for a day.
- Feel: firm, with a little give. Mushy or leaking fruit has gone.
- Smell: fresh and sweet, never sour or fermented.
To open, pinch the skin hard between your thumbnails, or make a shallow cut around the middle, and squeeze. The fruit pops out. Eat the flesh around the seed. In some varieties a thin, papery layer from the seed coat clings to the flesh; nibble around it rather than eating it.
The seed itself isn’t food. It’s bitter, and raw rambutan seeds contain compounds that can upset the stomach. Rambutan is a close relative of lychee, so the sensible habits in our lychee guide apply here too: ripe fruit only, and for children, after a proper meal rather than on an empty stomach.
How to store all three
| Fruit | Counter | Fridge |
|---|---|---|
| Passion fruit | 3 to 5 days, until wrinkled | About a week once ripe |
| Mangosteen | 2 to 3 days | Up to about a week, in a bag |
| Rambutan | 1 to 2 days | A few days in a loosely closed bag |
For all three, wash the outside under running water just before opening, since your fingers carry whatever is on the skin to the fruit. No soap.
Are they worth it? An honest verdict
Nutritionally, none of these fruits is special. Mangosteen and rambutan are mostly water and natural sugar with some vitamin C and a little fibre, very much like lychee. Passion fruit is the most interesting of the three, since its seeds make it unusually high in fibre for its size. But weigh them against what you can buy at the thela.
Buy them for the taste and the fun. Your guava is still doing the heavy lifting.
| Fruit | What it’s like | Worth it? |
|---|---|---|
| Passion fruit | Tart, perfumed, crunchy seeds | Yes, as a flavour; one fruit lifts a whole jug of drink |
| Mangosteen | Sweet, soft, delicate | Once, for a fresh one; old ones waste your money |
| Rambutan | Lychee-like | Only when lychee is out of season |
A guava gives far more vitamin C than any of them, jamun and falsa give colour and tang in summer, and mango gives more of almost everything. So if the price makes you hesitate, you’re not missing a health secret. You’re missing a nice taste, and that’s a fair thing to pay for now and then. Our dragon fruit guide reaches the same verdict for the most famous supermarket exotic of all.
Can diabetics eat passion fruit, mangosteen or rambutan?
Passion fruit, yes, and easily: a whole fruit holds little sugar and a lot of fibre. Mangosteen and rambutan are sweeter, so treat them like lychee and keep to a small handful, around 4 or 5 pieces, with a meal. Avoid tinned versions in syrup.
Easy ways to use them
Passion fruit nimbu pani
Stir the pulp of 2 passion fruit into 500 ml cold water with the juice of half a lemon, 1 to 2 teaspoons sugar and a pinch of kala namak. Strain if you don’t like the seeds. Serves two.
- Tropical fruit chaat: 6 peeled rambutans or 2 mangosteens’ segments, 1 diced mango or guava, a few mint leaves and a squeeze of lime. Take out any seeds first.
- Passion fruit dahi: spoon the pulp of 1 fruit over a bowl of thick plain yogurt. No sugar needed.
Myths and surprising facts
Myth: mangosteen juice and capsules work like medicine
The pills and juices are made mostly from the rind, and they’re marketed with big promises about joints, sugar and weight. None of that is established. The fruit is a lovely fruit. The capsules are a supplement with unknown effects and possible interactions, so ask your doctor before trying any, especially if you take blood thinners.
Myth: a wrinkled passion fruit has gone bad
It’s the opposite. Wrinkling is how you know it’s ready. Only mould, a sour smell or a very dry, hollow feel means it’s past it.
Surprising facts: count the little petal-shaped lobes on the bottom of a mangosteen, and you’ll know how many segments are inside before you open it. Mangosteen is also a cousin of kokum, the sour fruit used in Konkan cooking; both belong to the Garcinia family. And passion fruit got its name from missionaries in South America, who saw symbols of the Passion of Christ in the shape of its flower. In parts of India the flower is called krishna kamal, for similar reasons of devotion.
For children under 5, remove all rambutan and mangosteen seeds and cut the flesh into small pieces, because a slippery whole fruit with a seed is a classic choking hazard. Don’t eat passion fruit rind or rambutan seeds. People with a latex allergy can react to passion fruit (it’s one of the known latex-linked fruits, like banana, avocado and kiwi), so try a small amount first or skip it; lip swelling, throat tightness or wheezing after eating any fruit needs urgent care. If you’re on a kidney diet or take medicines where food matters, check with your doctor before trying mangosteen supplements, which are a different thing from the fruit.
Exotic fruit questions people ask
How do I know if a passion fruit is ripe?
It’s wrinkled, heavy for its size and fully coloured. Smooth ones need a few more days on the counter.
Can you eat passion fruit seeds?
Yes. The black seeds are soft enough to crunch and swallow, and they carry most of the fruit’s fibre. Sieve them out if you only want juice.
How do you know if a mangosteen is good?
Deep purple, a fresh green cap and a rind that gives slightly when you press it. A rock-hard rind usually means brown, bitter segments inside.
Can I keep mangosteen in the fridge?
Yes, in a bag, for up to about a week. It keeps better than on the counter, but eat it soon, because the rind slowly hardens even in the cold.
Can you eat the rambutan seed?
No. Discard it. It’s bitter and raw seeds can upset the stomach; some people roast them, but there’s no reason to take the chance.
What does mangosteen taste like?
Sweet, soft and gently tangy, somewhere between lychee, peach and pineapple. A fresh one is juicy; an old one tastes flat.
Is rambutan the same as lychee?
No, but they’re close relatives. Rambutan has a hairy red skin and slightly creamier, less perfumed flesh, while lychee has a bumpy, hairless shell.
Can I eat mangosteen or passion fruit in pregnancy?
The fresh fruits are fine in normal portions, washed and opened cleanly. Skip mangosteen juices and capsules, which are supplements rather than food.
Is mangosteen high in sugar?
It’s about as sweet as lychee. A few segments with a meal suit most people, including those with diabetes.
Are these fruits good for kids?
Yes, as a treat of fresh fruit, once seeds are removed and the flesh is cut small for under-5s. Watch for any sign of allergy the first time.
Why is passion fruit called passion fruit?
Missionaries in South America named it after the Passion of Christ, which they saw in the parts of its flower. It has nothing to do with romance.
More honest buying guides are in Fruits and Vegetables.