How to Cut Kathal (Jackfruit), Store It and Cook the Seeds
Oil your hands, your knife and your board before you cut kathal (jackfruit), and the sticky sap stops being a problem. That one step is the whole trick. Kathal is really two foods: green kathal is a firm, meaty vegetable for sabzi and biryani, and ripe kathal is a sweet, fragrant fruit. This guide covers how to pick each one, how to cut and store it, and why you should never throw the seeds away.
Before you start
- Green kathal (sabzi): dark green, firm, sharp close spines, plenty of white sap when cut.
- Ripe kathal (fruit): strong sweet smell, yellowish skin, flattened spines, gives when pressed.
- Cutting kit: mustard or any cooking oil, a big knife, newspaper, gloves if your skin is sensitive.
- Seeds: always cooked, never raw. Boil or roast them.
- Season in India: green kathal from late winter into spring, ripe fruit through summer.
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Green kathal vs ripe kathal: two different foods
It’s the same fruit at two ages. Picked young, it’s mild, starchy and stringy, with a texture that pulls apart a bit like cooked meat, which is why it’s become famous as a vegetarian “meat” in pulled-jackfruit burgers. Leave it on the tree and it turns into something else entirely: soft golden bulbs that taste like banana, pineapple and mango at once, with a smell that fills a room.
You can’t swap them. A ripening kathal dropped into a sabzi goes sweet and mushy, and a green one served as fruit is bland, gummy and faintly bitter, so the first question at the stall is always what you’re cooking tonight.
In India, green kathal fills North Indian sabzi markets from about February to May and ripe fruit peaks from May into July, with Kerala, Bengal, Assam and the south growing most of it. Pakistan grows very little. There it’s a big-city find.
How to choose kathal at the market
For sabzi (green, raw kathal)
- Colour: even, deep green. Yellow patches mean it’s started ripening.
- Spines: sharp and packed close together. Spreading, blunt spines mean it’s older.
- Size: a small to medium fruit (roughly 2 to 4 kg) is tender, while a huge green one will have more fibre, bigger seeds and a tougher core to cut around.
- Sap: ask the seller to nick it. A young kathal bleeds lots of milky white sap.
- Buy by the piece if you don’t need a whole fruit: many sabziwalas sell peeled chunks by weight, and good ones are pale cream with small, soft seeds.
For eating (ripe kathal)
Smell comes first. A ripe jackfruit smells sweet and fruity from a step away, the skin shifts from green to yellowish or light brown, the spines flatten out, and the fruit gives slightly when you press it. A dull, hollow thud when you tap it is the old market test. A sour, boozy smell, wet brown patches or flies crowding one spot mean it’s gone too far.
You’ll also meet two kinds of ripe flesh, famously split in Kerala into firm, crunchy bulbs (varikka) and soft, slippery ones (koozha). Firm bulbs are easier to eat and keep better in the fridge, while soft ones are sweeter and better for halwa, payasam and shakes.
How to cut kathal at home without the sticky mess
The sap is a natural latex. Water makes it worse. Oil dissolves it.
- Spread newspaper over the counter. Rub 1 to 2 tablespoons of mustard or cooking oil over your palms, fingers, the knife blade and the board.
- Wash the outside under running water first if the fruit is dusty, then dry it well.
- Cut the fruit into thick rounds, about 4 cm, or halve and quarter it.
- Slice the thick spiny skin off each piece, re-oiling the knife whenever it starts to drag.
- Green kathal: in a young fruit the central core is tender and can stay; in an older one, cut it out. Chop into 3 to 4 cm chunks and drop them into a bowl of water so they don’t darken.
- Ripe kathal: pull out the golden bulbs with your fingers, then split each one, pop out the seed and peel off the thin white skin around it. Leave the pale stringy fibres behind; they’re edible but bland.
- Clean up with oil. Wipe the knife and your hands with an oily cloth, then wash with soap and warm water.
That sap is strong stuff. People once used it as a glue for mending pots and even for trapping birds.
How to store kathal, raw or ripe
| What | Where | How long |
|---|---|---|
| Whole green kathal | Cool, airy spot | 2 to 3 days; it keeps ripening |
| Cut green pieces | Closed box, fridge | 2 to 3 days |
| Ripe bulbs, seeds out | Closed box, fridge | 3 to 4 days |
| Blanched green pieces or ripe bulbs | Freezer | A few months |
Seal ripe kathal tightly. Its smell gets into milk, butter and everything else on the shelf. Cut green pieces last far longer frozen if you blanch them in boiling salted water for 3 to 4 minutes, cool them fast in cold water, pat them dry and freeze them flat in a bag, and without a fridge your best bet is to keep the kathal whole, since cut pieces turn sour within a day in summer heat. Our cut fruit fridge chart has safe times for other fruit.
Kathal seeds: boil them, don’t bin them
Every ripe fruit gives you a bowlful of seeds, and cooked, they’re genuinely good food: starchy and nutty like chestnuts, with more protein than the flesh around them. Raw seeds aren’t. They carry compounds that upset digestion until heat breaks them down.
- Rinse the seeds and pull off any bulb flesh.
- Boil them in salted water for 20 to 30 minutes, until a knife slides in.
- Peel off the tough white outer coat. The thin brown skin underneath can stay.
- Eat them with a pinch of salt and chaat masala, slice them into sabzi or dal, or roast the boiled seeds in a dry pan for 5 minutes for a crisp snack.
Uncooked seeds keep for a couple of weeks spread out in a cool, dry, shady place, or longer in a paper bag in the fridge, and boiled ones keep 3 to 4 days in a closed box.
What kathal does for you, honestly
Ripe kathal is a proper fruit, not a light one. A cup of bulbs (about 165 g) comes to roughly 150 calories, mostly natural sugar, with a few grams of fibre, some vitamin C and vitamin B6, and a lot of potassium, more than a medium banana. Green kathal is different. It’s a starchy vegetable.
Kathal chews like meat. It doesn’t feed you like meat.
That’s the big hype to clear up. Green jackfruit has well under 2 g of protein per 100 g, while chicken has more than ten times that. If you’re cooking kathal biryani or kathal kebabs as a vegetarian main, add dal, chana, paneer or dahi on the side so the meal still carries protein.
Kathal recipes: sabzi, snack and a ripe-fruit shake
Dry kathal ki sabzi
Boil 500 g green kathal chunks in salted water with a quarter tsp haldi for 10 minutes and drain. Heat 2 tbsp mustard oil, add 1 tsp zeera, 2 sliced onions and brown them. Add 1 tbsp ginger-garlic paste, 2 chopped tomatoes, 1 tsp dhania powder, half a tsp red chilli and salt, and cook until the oil separates. Add the kathal, stir, cover and cook on low for 10 minutes. Finish with half a tsp garam masala and fresh dhania.
Ripe kathal and dahi shake
Blend 6 to 8 deseeded ripe bulbs with 1 cup chilled milk or half a cup dahi and a few ice cubes. It’s sweet enough without sugar. Whole bulbs still beat the shake if you’re watching sugar, since you’ll eat fewer.
In many homes kathal is called “the poor man’s meat”, cooked like mutton on meatless days and at weddings. Elders also warn against milk or paan after kathal, and against eating lots of ripe kathal in one go because it sits “heavy”. The heavy part is fair; it’s a dense, fibrous, sugary fruit, and big helpings can cause gas and bloating.
Myths about kathal
Myth: Milk after kathal is poisonous or causes skin disease
There’s no evidence for either. The rule probably grew out of how heavy a big kathal meal already feels, and a glass of milk on top of that won’t help your stomach, but kathal shakes and kathal payasam are made with milk all over South India without anyone coming to harm.
- Jackfruit is the largest fruit that grows on a tree. Single fruits can pass 40 kg.
- It grows straight off the trunk and thick branches, not from the tips of twigs.
- Each golden bulb comes from its own flower, so one jackfruit is really hundreds of flowers fused together.
- It’s the national fruit of Bangladesh.
Kidney disease: ripe kathal is high in potassium, so anyone told to limit potassium should ask their kidney team before eating it; see our low-potassium fruit and vegetable list for easier choices. Diabetes: green kathal sabzi fits a normal meal; ripe bulbs are sugary, so keep to a small bowl with a meal. Allergies: jackfruit allergy is uncommon but reported, mostly in people already allergic to birch pollen; tingling lips, hives, a swollen throat or wheezing after eating it need urgent medical help. Sensitive skin: the sap can cause an itchy rash, so wear gloves. Young children: cut ripe bulbs into small pieces and never give seeds, raw or cooked, to under-5s as whole pieces, as they can choke.
Kathal questions, answered
How do you know if jackfruit is ripe?
A ripe jackfruit smells strongly sweet, its skin turns yellowish or light brown, and its spines flatten and spread. It gives slightly when pressed. If it still smells of nothing and feels rock hard, it’s green kathal for cooking.
How do I store cut kathal in the fridge?
Put cut pieces in a tightly closed box and use green kathal within 2 to 3 days and ripe bulbs within 3 to 4. For longer, blanch green pieces and freeze them. Seal ripe kathal well or everything else in the fridge will smell of it.
How do I get jackfruit sap off my hands?
Rub cooking oil into the sticky spots first, then wash with soap and warm water, and do the same for knives and chopping boards, because water alone only makes the sap stringier and harder to shift.
Can diabetics eat kathal?
Green kathal cooked as sabzi is fine in a normal portion with roti or rice. Ripe kathal is much sweeter, so keep it to a small bowl eaten with a meal, not a big plate on its own. Fried kathal chips? Skip them.
Is kathal good for weight loss?
Green kathal sabzi made with little oil is filling and fairly low in calories, so it can fit, but ripe kathal is calorie-dense for a fruit and kathal cooked like mutton in lots of oil isn’t light. How it’s cooked matters more than the kathal itself.
Can you eat raw jackfruit seeds?
No. Raw seeds are hard to digest and carry compounds that only heat breaks down. Boil them for 20 to 30 minutes or roast them after boiling.
Is kathal good for kidney patients?
Usually it’s one to limit. Ripe kathal carries a lot of potassium, which people with reduced kidney function often have to cut back. Ask your kidney team first.
Is it safe to eat kathal during pregnancy?
Cooked green kathal and ripe kathal in normal food amounts are generally fine in pregnancy. Big helpings of ripe kathal can bring gas and a lot of sugar, which matters with gestational diabetes.
How can I tell if jackfruit has gone bad?
A sour, alcoholic or rotten smell, slimy or brown bulbs and mould mean it’s spoiled. Cut green kathal that turns dark and soft or smells sour should go too.
When is kathal season in India?
Green kathal for sabzi is easiest to find from about February to May, and ripe jackfruit peaks from May into July. Kerala and the south may have fruit earlier, and frozen or canned kathal fills the gap the rest of the year.
Can we drink milk after eating kathal?
There’s no evidence it’s harmful. A big kathal meal followed by milk can feel heavy and gassy, so if that happens to you, leave a gap. Kathal and milk are combined in plenty of South Indian sweets.
Is kathal good for uric acid?
Kathal is a plant food and isn’t a notable source of purines, so it isn’t one of the foods usually limited for gout. Uric acid depends far more on body weight, alcohol, sugary drinks and medicines, so follow your doctor’s plan if you have gout.
Find more guides like this one in Fruits & Vegetables, and read up on how to wash fruit and vegetables properly.