The cocky apple (Planchonia careya) is a savanna tree of northern Australia whose fruit, flowers, young leaves and roots have all been eaten, but not in the same state and not with the same preparation. This calculator takes the ripeness stage and the plant part you actually have in front of you and returns whether it is worth eating raw, whether it needs cooking, and roughly how much edible material you will get from the fruit you picked.
It removes the guesswork from a plant that looks bland and slightly astringent when green and turns soft and aromatic only at full ripeness.
Loading calculator...
Cocky apple goes by several names, including cockatoo apple and billygoat plum’s neighbour on many species lists, though it is unrelated to Kakadu plum. Aboriginal groups across the Top End and the Kimberley used the fruit as a seasonal food and the bark as a fish poison, which is exactly why part-by-part guidance matters. The bark and unripe tissue are not the ripe pulp.
This tool is educational. It helps a home grower or a curious forager think through preparation before biting into something, and it gives a working estimate of yield for anyone gathering fruit in quantity. It is not a substitute for confident botanical identification or local knowledge.
π’ How to use the cocky apple edibility calculator
Start with the fruit ripeness stage. The calculator offers green, colour-breaking, and fully ripe (fallen or soft). This single choice moves the verdict more than anything else, because green cocky apple is fibrous and astringent while the ripe fruit softens and develops a mild, slightly floury sweetness.
Next choose the plant part. The options are ripe fruit, young leaves and shoots, flowers, and bark or root. Selecting bark or root shifts the verdict away from food entirely, since these tissues were traditionally used to stun fish in still water and are not a snack.
The safest default for a first taste is a fruit that has already fallen and gone soft, eaten in a small quantity. Fallen ripeness is the plant telling you it is done.
The preparation method field lets you compare raw, roasted, and boiled or leached. Roasting was a common treatment for firmer fruit and for tubers, softening texture and reducing astringency. The verdict text updates to tell you whether your chosen preparation suits the part and stage you picked.
Enter the quantity on hand as a fruit count and set the average fruit weight. A cocky apple fruit is roughly egg-shaped and commonly lands between 30 and 60 grams, so the default sits in that band. As you raise the count or the average weight, the estimated edible portion climbs and the suggested serving size scales with it.
Watch the caution note as you change inputs. When you select a stage or part that the calculator treats as not-for-eating, the note becomes the most important line on the screen and the edible portion drops to zero regardless of how many fruits you entered.
The output is meant to be read top to bottom: verdict first, then what to do with the material, then how much of it is actually food.
π± Calculator fields explained
Fruit ripeness stage – a select with three options: green, colour-breaking, and fully ripe or fallen. The default is fully ripe. Ripeness sets the base edibility score and decides whether raw eating is sensible.
Plant part – a select covering ripe fruit, young leaves and shoots, flowers, and bark or root. The default is ripe fruit. Bark or root selects a non-food traditional use and forces a strong caution.
Preparation method – a select offering raw, roasted, and boiled or leached. The default is raw. This modifies the verdict for firmer material, since cooking softens and reduces astringency.
Quantity on hand – a number field for how many fruits you have, measured in whole fruits. The default is 10. It drives the total edible portion.
Average fruit weight – a number field in grams for the typical single fruit, defaulting to 45 g with a step of 5. Combined with the count and the flesh fraction, it produces the edible weight.
π Understanding the results
| Result | What it means | What you do with it |
|---|---|---|
| Edibility verdict | Whether the part and stage are food, need cooking first, or should not be eaten | Decide whether to proceed at all |
| Recommended preparation | The treatment that suits the material you entered | Roast, boil, or eat raw accordingly |
| Estimated edible portion (g) | Total gram weight of usable flesh from your fruit count | Plan how far the harvest goes |
| Suggested serving size | A conservative first-taste or per-person amount | Portion out a sensible tasting |
| Caution note | Safety flag tied to the part and stage | Stop and reconsider when flagged |
The hero number is the edibility verdict. Everything else is secondary to it. A verdict of eat when ripe means the fruit passed the stage and part checks; a verdict of cook first means the material is edible only after roasting or leaching; a verdict of not for eating means the tissue you chose has a traditional non-food use and the calculator will not hand you a serving size.
The estimated edible portion is built from your fruit count, the average weight, and a flesh fraction. Cocky apple is not all pulp: it carries a firm centre and seed, so a large basket of fruit yields less usable food than the raw weight suggests. Reading the portion next to the count is what stops a grower overestimating a harvest.
Bark and root tissue of cocky apple was used to stun fish in waterholes. Treat any verdict pointing at bark or root as a hard stop, not a suggestion to prepare it differently.
The suggested serving size is deliberately small for a first taste. A new food, even a documented traditional one, is something you sample in a modest amount before eating freely.
A green cocky apple can drop the edible portion to near zero after cooking losses. Firm green fruit loses moisture and usable texture when roasted, so the tool discounts it heavily. If your portion looks disappointing, the ripeness stage is usually the reason.
When the suitability of the material is borderline, the caution note carries the weight the verdict cannot. Read both together rather than acting on the single word at the top.
π Calculation formulas
The edible portion is a simple chain: total raw weight, times a flesh fraction for the part and ripeness, times a preparation retention factor.
Edible portion = count x average weight x flesh fraction x prep retention
For 10 fully ripe fruits at 45 g, with a ripe-fruit flesh fraction of 0.55 and raw retention of 1.0, the portion is 10 x 45 x 0.55 x 1.0 = 247.5 g. The suggested serving is the portion divided across a per-serving base of about 80 g, giving roughly three tastings.
Flesh fraction is the single most influential coefficient here. A change from 0.55 to 0.45 removes almost a fifth of the estimated food from the same basket.
The parameters below are reconstructed and must be checked against the shipped code.
| Parameter (verify against code) | Illustrative value |
|---|---|
| Flesh fraction, ripe fruit | 0.55 |
| Flesh fraction, colour-breaking | 0.45 |
| Flesh fraction, green | 0.30 |
| Prep retention, raw | 1.00 |
| Prep retention, roasted | 0.85 |
| Prep retention, boiled or leached | 0.75 |
| Base serving size | 80 g |
| Default average fruit weight | 45 g |
| First-taste serving | 40 g |
Practical examples
1. Single ripe fruit, home taste. Inputs: fully ripe, ripe fruit, raw, 1 fruit, 45 g. Calculation: 1 x 45 x 0.55 x 1.0 = 24.75 g. Result: a verdict of eat when ripe and a first-taste serving. Next step: sample a small piece and note the astringency before eating the rest.
2. Small backyard pick. Inputs: fully ripe, ripe fruit, raw, 10 fruits, 45 g. Calculation: 247.5 g edible, about three servings. Next step: eat fresh within a day or two, since ripe fruit softens fast.
3. Colour-breaking fruit, roasted. Inputs: colour-breaking, ripe fruit, roasted, 12 fruits, 50 g. Calculation: 12 x 50 x 0.45 x 0.85 = 229.5 g. Next step: roast to soften, then taste; expect a floury texture.
4. Green fruit, raw. Inputs: green, ripe fruit, raw, 8 fruits, 40 g. Calculation: 8 x 40 x 0.30 x 1.0 = 96 g, but the verdict flags heavy astringency. Next step: leave the fruit to ripen rather than eat green.
When the verdict and the portion disagree with your expectation, trust the verdict. A large portion under a cook-first verdict still means cook first.
5. Young leaves and shoots. Inputs: any stage, young leaves and shoots, boiled or leached, quantity ignored for weight. Result: a cook-first verdict with a small portion. Next step: use sparingly as a cooked green, not a bulk food.
6. Flowers. Inputs: flowers, raw. Result: an edible-in-small-amounts verdict. Next step: use as a minor addition, not a staple.
7. Commercial gathering estimate. Inputs: fully ripe, ripe fruit, raw, 200 fruits, 50 g. Calculation: 200 x 50 x 0.55 x 1.0 = 5,500 g, about 5.5 kg edible from roughly 10 kg picked. Nearly half the picked weight is not edible pulp. Next step: plan storage and use around the real yield, not the basket weight.
8. Bark, misidentified as food. Inputs: bark or root, any preparation. Result: a not-for-eating verdict, zero portion, strong caution. Next step: discard the idea; this is fish-poison tissue.
Tips and best practices
Pick ripeness by feel and colour, not by calendar. A cocky apple that has fallen and gives slightly under a thumb is the one to taste first, and the calculator’s default reflects that.
Weigh a handful of your fruit before trusting the 45 g default. Local trees and seasons vary, and the average weight field is there precisely so your portion estimate matches your tree rather than a textbook one.
Taste before you gather in bulk. A short sampling session with two or three fruits tells you whether the astringency has fallen enough to be worth a full pick.
Gathering fallen ripe fruit into a shallow tray, rather than stacking it deep, keeps the soft pulp from bruising and spoiling before you can use it.
Roast firmer fruit rather than forcing it raw. The retention factor for roasting looks like a loss on paper, but the texture and flavour gain usually justify it for colour-breaking fruit.
Keep bark and root work entirely separate from any food handling. If you have ever cut bark for its traditional fish use, do not use the same board or knife for fruit without cleaning.
Use ripe fruit quickly. It does not hold like a firm orchard fruit, so plan to eat or process within a day or two of full softness.
Note the seed and firm centre when you cut. That structure is why the flesh fraction sits near half, and seeing it makes the yield estimate believable.
Record what a given tree tastes like at each stage across a season. Cocky apple flavour shifts, and your own notes beat any generic guide for your patch.
β οΈ Common mistakes to avoid
Treating all plant parts as equally edible
The fruit and the bark are not the same thing. People new to bush foods sometimes assume that if the fruit is eaten, the rest of the plant is fair game.
Cocky apple bark and root were used as a fish poison. Eating them is not a preparation problem to solve, it is something to avoid.
Choose the correct plant part in the calculator and let the verdict stand.
Eating green fruit raw and expecting sweetness
Green cocky apple is astringent and fibrous. The disappointment leads some to conclude the fruit is not worth eating at all.
Let it ripen to soft or fallen, then taste again. The stage field exists so you can see how much the verdict improves.
Overestimating harvest weight
A basket that weighs 10 kg does not give 10 kg of food. The seed and firm centre take a real cut.
Assuming full basket weight as edible overstates a harvest by close to half. Use the edible portion output, not the picked weight.
Skipping the first-taste step
A documented traditional food is still new to your body. Eating a large amount on first contact is a needless risk.
Do not treat the serving size as a target to beat. It is a starting amount, and a small first taste is the sensible move.
Sample the suggested serving, wait, and only then eat more.
Confusing cocky apple with an unrelated look-alike
Northern Australian savanna holds several fruiting trees. A rough resemblance is not identification.
Confirm the species with a reliable local source before you eat anything the calculator scores.
Ignoring the caution note because the verdict looked fine
The verdict and the caution note carry different information. A borderline case can pass the verdict and still warrant care.
Read both lines every time rather than stopping at the first word.
When to use this calculator
Reach for it when you have cocky apple material in hand and you are deciding whether to eat it, cook it, or leave it. The stage and part choices turn a vague memory of “this is edible” into a specific instruction for the fruit on your bench.
It earns its place when you are gathering in quantity and need a realistic yield before you commit storage space or processing time. The gap between picked weight and edible weight is large enough to change plans.
The plant tells you most of what you need through ripeness and part. The calculator just makes that reading explicit and gives you a number to act on.
It is not worth opening for a single confidently ripe fruit you are about to eat anyway, or when you have not yet confirmed the species. Identification comes first; portioning comes after.
Related calculators
Cocky Apple Nutrition Calculator, Cocky Apple Growing Calculator.
Glossary
Cocky apple – common name for Planchonia careya, a deciduous savanna tree of northern Australia with edible ripe fruit.
Planchonia careya – the botanical name of cocky apple, in the family Lecythidaceae.
Astringent – the dry, puckering mouthfeel of unripe fruit caused by tannins.
Colour-breaking – the stage when a fruit begins shifting from green toward its ripe colour.
Flesh fraction – the share of whole-fruit weight that is usable pulp after removing seed and firm centre.
Prep retention – the fraction of edible material that survives a cooking method.
Leaching – soaking or boiling to remove astringent or bitter compounds before eating.
Fish poison – plant tissue used traditionally to stun fish in still water; not a food.
Is cocky apple the same as Kakadu plum? No. They are different species with different uses, and the names are sometimes muddled by people new to bush foods.
Bush food – a plant or animal food native to Australia and used by Aboriginal people.
Fallen ripeness – the point at which fruit drops naturally, often the safest signal of full ripeness.
Serving size – a portion of edible material, here kept conservative for first tasting.
Top End – the northern part of the Northern Territory where cocky apple grows.
β Frequently asked questions
Can you eat cocky apple raw?
Ripe cocky apple fruit has been eaten raw when soft, with a mild, slightly floury flavour and some astringency. The calculator returns a raw-edible verdict for the fully ripe stage.
Green fruit is a different case. It is fibrous and astringent, and the tool discounts it heavily, so let firm fruit ripen before tasting.
Which parts of the plant are edible?
The ripe fruit is the main food. Young leaves, shoots and flowers have also been used, generally in small amounts and often cooked.
Bark and root are the exception and were used to stun fish, so the calculator returns a not-for-eating verdict for them. Keep that tissue away from food entirely.
How much edible flesh does one fruit give?
At the default 45 g and a ripe flesh fraction near 0.55, a single fruit yields roughly 25 g of usable pulp.
The seed and firm centre account for the rest, which is why a large pick gives less food than its weight suggests.
Why is my portion so small for green fruit?
Green fruit carries a lower flesh fraction and loses more to cooking, so the estimate falls.
Ripeness is the lever. Moving the stage from green to fully ripe roughly doubles the usable pulp from the same count.
If the number looks low, ripen the fruit and run it again.
Is cocky apple safe for everyone?
This tool is educational and does not clear anyone to eat a wild plant. People react differently to unfamiliar foods.
Sample a small first-taste amount, and if you have allergies or a medical condition, check with a professional before eating bush foods.
Does cooking make green fruit worth eating?
Roasting softens firmer fruit and reduces astringency, which is why the tool offers it as a preparation.
Even roasted, green fruit yields well under half the usable pulp of ripe fruit. Cooking helps texture more than it helps quantity.
How do I know a fruit is ripe?
Full ripeness usually shows as softening and, often, the fruit dropping from the tree. Fallen fruit that gives slightly under a thumb is the calculator’s safest default.
Colour shift alone is not enough; use feel as well.
Can I store ripe cocky apple?
Ripe fruit softens and spoils quickly, so it is best eaten or processed within a day or two.
For anything longer, cooking or drying is more realistic than fresh storage, and the growing and nutrition calculators cover handling in more depth.
βοΈ Disclaimer
This calculator provides educational and agricultural planning information about cocky apple. It does not identify plants for you and is not a clearance to eat any wild material.
Results depend on the specific tree, cultivar, ripeness, soil, climate and preparation. The flesh fractions and retention factors used here are illustrative and should be verified against the shipped calculator and against local knowledge.
Health content here is not medical advice. Reactions to unfamiliar foods vary between people, and traditional use by one group does not guarantee safety for another.
Confirm identification with a reliable local source, and consult a qualified professional or a regional extension service before eating, gathering in quantity, or relying on any wild food.
