egg — 50 ml beaten egg (1 egg) for every 15 ml chia seeds plus its 45 ml soaking water
Here chia's job is binding and holding moisture, and ground flaxseed forms the same mucilage gel at the same volume, while psyllium does it at a third of the amount; a real egg binds even better if the bake doesn't need to stay vegan.
You're stirring chia into veggie burgers, fritters or meatless balls so they don't fall apart in the pan.
Patties need a sticky glue that holds as they fry, and ground flaxseed gives the same gel as chia; egg sets firmer with heat, and psyllium grips strongly enough that a small amount stops crumbling.
You're stirring chia into milk or yoghurt and leaving it in the fridge to set into a breakfast pudding.
basil seeds — 15 ml for every 15 ml chia seeds (3 tsp)
A cold-set pudding relies on seeds that thicken liquid without cooking, which basil seeds do faster than chia with a similar beaded texture; oats also thicken overnight but turn it into overnight oats rather than a set pudding.
You're mashing fruit with chia to make a quick, low-sugar jam or compote that sets without long boiling.
cornflour — 7.5 ml for every 15 ml chia seeds (1½ tsp)
basil seeds — 15 ml for every 15 ml chia seeds (3 tsp)
The jam only needs thickening, so cornflour gives a smooth, glossy set once simmered, and basil seeds keep the no-cook, seed-speckled style of chia jam.
You're stirring dry chia through a muffin or loaf batter, or sprinkling it on bread, a salad or a dressing for speckle and a little crunch.
poppy seeds — 15 ml for every 15 ml chia seeds (3 tsp)
Used dry in small amounts, chia is only adding texture and look, and poppy seeds give the same fine crunch and dark specks without needing to gel.
What Chia Seeds does in a recipe
binding · primary — Soaked chia forms a sticky gel from the mucilage on its seed coat, which holds batters, doughs and patties together the way a beaten egg would.
thickening & setting · primary — The seeds absorb many times their weight in liquid without cooking, setting milk into pudding and fruit into a spoonable jam.
moisture · secondary — The gel holds water inside a bake, keeping muffins and quick breads from drying out.
texture & crunch · secondary — Dry seeds add a small crunch to crackers and toppings, while soaked seeds give a soft, tapioca-like pop.
Psyllium forms a stronger gel than chia, so it binds and holds moisture well but only at about a third of the amount.
The catch: Use a third as much psyllium as the chia, keep the liquid the same and whisk it in quickly because it gels in a minute or two; if the recipe is Australian its tablespoon of chia is 20 ml, so use a heaped teaspoon of psyllium rather than a level one, and add a little more if you only have whole husks.
Covers
binding, moisture, thickening & setting
Misses
texture & crunch
Taste
It is close to flavourless, with a faint husky note in large amounts.
Texture
Too much makes bakes rubbery and puddings jelly-like, while the right amount gives a soft, slightly chewy crumb.
Looks
Some brands tint baked goods a purple-grey colour.
Best for
gluten-free bread and wraps, vegan binding in muffins, veggie burgers
Cornflour thickens fruit into a jam-like set, but only once it has been boiled, and it binds nothing in baking.
The catch: Mix the cornflour with a little cold water first, stir it into the hot fruit and simmer for a full minute until glossy, and check the box says maize cornflour if you need it gluten-free, because Australian wheaten cornflour is made from wheat.
Covers
thickening & setting
Misses
binding, moisture, texture & crunch
Taste
The fruit tastes cleaner and brighter with no seedy, nutty note.
Texture
The set is smooth and glossy rather than speckled with soft seeds.
Looks
The jam looks clearer and more like a conventional jam.
Best for
chia-style fruit jam, fruit compote, pie and crumble fillings
Dairy-freeVeganNut-free
Tried this swap? How did it work?
poppy seeds
Straight swap
15 ml for every 15 ml chia seeds (3 tsp)
Where chia is stirred in dry purely for crunch and speckle, poppy seeds give a similar small crunch and look, but they do not gel or bind.
Covers
texture & crunch
Misses
binding, thickening & setting, moisture
Taste
They add a slightly sweet, nutty flavour that is a little stronger than chia.
Texture
The crunch is finer and crisper, with no soft gel around the seeds.
Looks
Blue-black specks that look much like black chia.
Best for
muffins and loaves with seeds stirred through, bread and roll toppings, salad dressings
People reach for them because ground linseed is a well-known chia replacement, but the gel-forming mucilage is far less available until the seed is broken, so grind them in a spice grinder or blender first and use them as ground flaxseed.
Tried this swap? How did it work?
When to buy the real thing
The recipe is a seed cracker or seed bar where soaked chia makes up most of the mixture and is the only thing holding it together.
Instead: Buy chia, or switch to a cracker recipe written for ground linseed, because swapping the bulk of the mix changes the liquid and baking time too much to guess.
You need a no-cook set, such as a raw jam or a chia pudding, and the only options you have are cornflour or oats.
Instead: Buy chia from the supermarket health food aisle or basil seeds from an Asian grocer, or accept a cooked cornflour jam or overnight oats as a different dish.
You're cooking for someone vegan and the only binder in the kitchen is egg.
Instead: Buy chia or ground linseed, which sit side by side in most Australian supermarkets, rather than serving a bake that no longer suits them.
Rescue a swap gone wrong
Your pudding or jam is still runny after several hours in the fridge.
Why: There isn't enough seed for the liquid, often because an Australian recipe's tablespoon is 20 ml and a 15 ml spoon leaves you a quarter short, or the seeds sank and clumped before they could absorb evenly.
Fix: Stir in another 5–10 ml of chia or basil seeds, whisk to break up any clumps and leave it for another 30 minutes before checking again.
Your psyllium-bound muffins or bread came out rubbery, wet-looking inside and tinged purple-grey.
Why: Too much psyllium was used, usually a full tablespoon in place of the chia, so the gel set too firm and some brands discolour in the oven.
Can't be fixed — next time: The texture can't be reversed once baked, so next time use a third as much psyllium as chia and whisk it in quickly with the liquid.
Your flaxseed-bound muffins look done on top but are gummy and dense in the middle.
Why: Ground flaxseed gel holds more water than chia and slows the centre setting, especially if the batter was overmixed.
Fix: Return them to the oven at about 160°C (320°F) for 5–10 minutes with foil over the tops, and next time add a few extra minutes to the bake.
Your cornflour fruit jam tastes chalky and turned thin again as it cooled.
Why: The cornflour wasn't simmered long enough to cook the starch fully, so it never reached its full set.
Fix: Tip it back into the pan and simmer, stirring, for a full minute until it turns glossy, then cool without stirring further.
Key numbers
Fat
about 31%Mostly polyunsaturated oil, which is why chia can turn stale and bitter if stored somewhere warm.
Dietary fibre
about 34%Much of this is soluble mucilage on the seed coat, which is what turns into gel when wet.
Protein
about 16–17%The protein plays little part in binding; the gel does that work.
Water
about 6%The seeds are very dry, so they pull liquid out of whatever they are stirred into.
Liquid absorbed
about 10–12 times its weightThis is why a small amount of chia sets a whole cup of milk.
Chia egg
15 ml seeds + 45 ml water (1 US tbsp seeds + 3 US tbsp water)AU tbsp = 20mlRest it 10–15 minutes until gluey; it replaces one egg as a binder but gives no lift.
Pudding ratio
about 1 part seeds to 5–6 parts liquid by volumeIt sets in the fridge in about 2 hours and firms further overnight.
Differences between countries
Applies to Australia
Linseed or flaxseed (Australia, United Kingdom, New Zealand, United States, Canada)
The usual chia stand-in is sold as linseed or linseed meal in Australia, the UK and New Zealand, but as flaxseed or flaxseed meal in the US and Canada. They are the same seed, so a recipe calling for one can use the other.
Applies to Australia
Tablespoon size in chia eggs (Australia, United Kingdom, New Zealand, United States, Canada)
An Australian tablespoon is 20 ml, while a UK, NZ, US or Canadian tablespoon is 15 ml. A chia egg from an Australian recipe therefore uses about a third more seed than one from an overseas recipe, so keep the seed-to-water ratio at 1 to 3 whichever spoon you use.
Applies to Australia
Corn flour versus cornflour (United States, Canada, Australia, United Kingdom, New Zealand)
In the US, corn flour means finely ground whole cornmeal, while the fine white thickener is called cornstarch. If you are thickening a fruit jam in place of chia, buy cornstarch there, not corn flour.
Applies to Australia
Wheaten cornflour (Australia, New Zealand)
Australian and New Zealand shelves carry both maize cornflour and wheaten cornflour, which is made from wheat. Only the maize version is gluten-free, so check the label before using it in a gluten-free jam.
Applies to Australia
Locally grown chia (Australia)
Chia is grown commercially in northern Australia, so Australian-grown packs sit alongside imported seed in supermarkets.
Where to buy it
Applies to Australia
Australia · easy to find
health food aisle
Look for it next to linseed, pepitas and other seeds; bulk food shops and health food shops also sell it loose.
United Kingdom · easy to find
health food or nuts and seeds aisle
Larger supermarkets stock it near the dried fruit and seeds, and health food shops carry bigger bags.
New Zealand · easy to find
health food aisle
It is usually shelved with linseed and other seeds, and bulk bins often have it too.
United States · easy to find
natural foods or baking aisle
Most supermarkets stock it with the flaxseed, and health food stores sell it in bulk.
Canada · easy to find
natural foods or baking aisle
It is usually found beside the flaxseed and hemp seeds, and bulk food stores sell it loose.
What is Chia Seeds called in other countries?
chiablack chia seedswhite chia seeds
Measurements differ too, not just names: the kitchen conversion chart covers cups, spoons and oven temperatures across these countries.
Questions people ask
How much chia seed and water replaces one egg?
Use 15 ml of chia seeds soaked in 45 ml of water for 10–15 minutes to replace one egg as a binder. Keep the ratio at one part seed to three parts water, which matters because an Australian tablespoon holds 20 ml rather than 15 ml. The chia egg binds and holds moisture but gives no lift, so it suits muffins, pancakes and brownies better than sponges.
Do you have to soak chia seeds before using them?
No, not when you want them for crunch, but yes when you need them to bind or set. Dry seeds stirred through a batter or sprinkled on bread stay slightly crisp. For a chia egg, pudding or jam, the seeds need liquid and time, about 10–15 minutes for a chia egg and around 2 hours in the fridge for a pudding.
Are black and white chia seeds the same?
Yes, black and white chia seeds come from the same plant and behave the same way in cooking. They absorb liquid and gel equally well, so you can swap them one for one. White seeds are simply less noticeable in pale dishes such as vanilla puddings or light-coloured muffins.
Is chia the same as linseed?
No, they are different seeds, but they do a similar job as an egg replacer. Chia gels when whole, while linseed needs to be ground to release enough gel to bind a batter. Ground linseed can replace chia at the same volume in bakes and patties, though it gives a softer, gummier set in puddings.
Should I grind chia seeds before using them?
You don't need to, because chia forms its gel whole, unlike linseed. Grinding is worth doing if you want a smoother pudding or a chia egg without visible specks. Store ground chia in the fridge, as the exposed oil turns stale faster than in whole seeds.
Why didn't my chia pudding set?
Usually there was too much liquid for the amount of seed, or the seeds clumped before they could absorb evenly. Aim for about 1 part seeds to 5–6 parts liquid by volume and stir again after 10 minutes to break up clumps. It should set in about 2 hours and firm further overnight.
Where Chia Seeds comes from
Chia seeds come from Salvia hispanica, a flowering plant in the mint family native to Mexico and Guatemala, where it was an important crop for the Aztecs. Today it is also grown commercially in South America and in northern Australia.
Chia Seeds is usually dairy-free, vegan, gluten-free, nut-free — check the label, and see the disclaimer.