Save chickpea water as a vegan egg-white (aquafaba)
That cloudy brine you usually pour down the sink whips into glossy peaks like egg white. Keep it instead and you get a free, animal-free baking ingredient out of something you were binning.
Aquafaba is one of those kitchen discoveries that feels almost too good to be true: the murky, slightly viscous liquid you’ve drained off tinned chickpeas your whole life is, it turns out, a near-perfect stand-in for egg white. The starches and proteins that leach out of the beans during cooking give the liquid the ability to trap air and hold a foam — whip it long enough and it climbs into the same glossy stiff peaks you’d get from eggs, no animal required.
That makes it a quiet hero for two camps at once. If you’re cutting back on eggs — for the animals, for allergies, or just to use up what’s already in the cupboard — it opens up meringues, macarons, mousse, royal icing and that silky cocktail foam without them. And whether or not you care about any of that, it’s free: you were tipping it down the sink, and now it’s an ingredient.
The honest caveat is that it behaves like egg white but isn’t identical. It takes noticeably longer to whip, the structure is a touch more delicate, and salted brine can taint sweet recipes — so start with an unsalted tin and a forgiving recipe like a basic meringue rather than something fussy. Get a feel for it there, and you’ll never pour the stuff away again.
How to do it
- Next time you open a tin of chickpeas, drain the liquid into a clean jar instead of the sink — that cloudy brine is aquafaba. One 400g tin gives you roughly 100–150ml, about the equivalent of 3–4 egg whites.
- Use it within a few days kept in the fridge, or freeze it in an ice-cube tray (one cube is roughly one egg white) and thaw what you need later.
- To replace egg white, whip the aquafaba with electric beaters for 5–10 minutes until it goes from watery to thick, white and glossy with stiff peaks — it takes longer than real egg, so be patient.
- Add sugar gradually once it's foaming if you're making meringues, exactly as you would with egg white, then bake low and slow until crisp.
- For richer bakes, use it unwhipped: roughly 3 tablespoons of aquafaba stands in for one whole egg in many cakes, brownies and pancakes as a binder.
- Whip in a spoonful into cocktails like a whisky sour for that classic silky foam, with no raw egg involved.
Pro tips & pitfalls
- A tiny pinch of cream of tartar or a few drops of lemon juice helps the foam hold its peaks for longer — handy for meringues and mousse.
- Liquid from no-salt or low-salt tins is most versatile; if yours is salted it's fine for savoury bakes but can make sweet meringues taste slightly off, so taste-test first.
What it's good for
Good for the planet
- Cuts waste Turns the brine from every tin of chickpeas — normally poured straight down the drain — into a genuine ingredient, so nothing from the tin goes to waste.
Good for you
- Saves money It's a free by-product of chickpeas you'd buy anyway — replacing several eggs per batch of meringues or cake quietly saves a euro or two each time you bake.
Good for people
- Animal-friendly A like-for-like replacement for egg whites in meringues, mousse, macarons and cocktails, so you skip the eggs entirely with no hens involved.
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