There is no single ingredient that replaces an egg in every recipe. First work out what the egg is doing: binding ingredients, holding water, emulsifying fat, setting when heated, or trapping air. A flax gel can hold a cookie together, but it cannot make a meringue. Aquafaba can foam, but it does not give a cake the same framework as cooked egg protein.

The quantities below are starting points for replacing one medium egg in a recipe that uses one or two. When eggs define the dish, as they do in sponge cake, custard and soufflé, adapting the whole formula works better than swapping one ingredient by volume.

Egg substitute chart

Main job	Starting amount for 1 egg	Best uses	Main limitation
Binding	1 tbsp ground flax + 3 tbsp water	cookies, patties, muffins	barely aerates
Adding moisture	50 to 60 g applesauce or banana	loaf cakes, brownies	can make bakes dense
Adding creaminess	60 g plant yogurt or blended silken tofu	muffins, custards, quiche	little lift
Foaming	30 ml aquafaba for a white; 45 ml for a whole egg	meringue, mousse, macarons	strength varies by can
Emulsifying	aquafaba or soy drink	mayonnaise, cold sauces	variable stability
Setting a savoury filling	hydrated chickpea flour	omelet, quiche, fritters	tastes raw unless cooked well
Holding breadcrumbs	flour or starch slurry	breaded vegetables, tofu	does not brown by itself
Glazing	plant drink with a little oil or syrup	buns, pies	different shine from yolk

These ratios cannot guarantee an identical result in every batter. Water, sugar, gluten, mixing method and pan size matter just as much as the replacement.

What an egg does in food

Protein builds a structure that sets

When egg white and yolk are heated, their proteins unfold and join together. This coagulation turns a liquid into a solid network. It helps a quiche set and keeps a cake standing after it cools. Starch and seed mucilage can bind ingredients, but neither behaves exactly like cooked egg protein.

Yolk helps oil and water mix

Mayonnaise works because tiny drops of oil remain dispersed through a water based phase. Components in yolk, including phospholipids, help stabilise that emulsion. Soy drink and aquafaba can do a similar job if oil is added gradually and the mixture contains enough liquid.

Whipped white traps air

Whisking egg white incorporates bubbles and its proteins hold them in place. Sugar makes foam slower to form, but more stable once dissolved. Aquafaba is the most useful plant based replacement for this job. Its dissolved carbohydrates, proteins and other bean solids give it foaming, thickening, binding and emulsifying properties. A 2025 scientific review found that the type of pulse, water ratio, soaking and cooking time all affect performance.

Eggs also supply water, fat and colour

Removing an egg takes away several things at once. Adding starch alone can leave a dry batter. Fruit purée may make it moist but fragile. A successful recipe sometimes uses two tools, such as flax gel for binding and baking powder for lift. The reference page on eggs as food gives further background on composition and cooking behaviour.

Baking: match the substitute to the texture

Flax or chia gel for dense and chewy bakes

Mix 1 tablespoon ground flaxseed or chia seed with 3 tablespoons water. Leave it for 5 to 10 minutes, until the mucilage has absorbed the water and made a gel.

This works well in soft cookies, brownies, muffins, patties and quick breads. It does not create a particularly light crumb. King Arthur Baking’s practical comparison reaches the same conclusion: flax and chia add body and binding, but little aeration. Brown flax is visible in pale batter; golden flax is less obvious. Grind only what you need, or refrigerate ground seed in a sealed container because it goes rancid faster. The reference on flax covers its mucilage and alpha-linolenic acid.

Applesauce, banana and vegetable purées for moisture

Use about 50 to 60 g unsweetened applesauce, mashed banana or pumpkin purée for one egg. These make a soft but denser crumb, which suits banana bread, spiced loaf cake, brownies and muffins. Banana has a clear flavour. Applesauce is quieter. In cookies, a large quantity of purée reduces spreading and often produces a cakey texture.

Do not automatically add more liquid. Mix the batter first and correct its consistency a spoonful at a time. If a recipe already contains plenty of grated fruit or vegetables, flax gel is usually easier to control.

Plant yogurt and silken tofu for softness

About 60 g plain plant yogurt can stand in for one egg in a muffin or loaf cake. A thick yogurt works better than a watery one. Soy yogurt and coconut yogurt have very different protein and fat contents, so the same amount may not set in the same way. Our method for homemade plant yogurt explains how to control thickness.

Blended silken tofu suits fudgy brownies, cheesecakes, custards and quiche filling. Start with 60 g per egg in a batter, but judge a custard by final consistency rather than a fixed exchange. Tofu binds and adds density; it does not provide lift. Adding 180 g tofu to a recipe containing three eggs will not turn it into an eggless sponge.

Aquafaba for air, with limits

Liquid drained from canned chickpeas is the most consistent option. Use 30 ml for an egg white or roughly 45 ml for a whole egg. These starting amounts also appear in the technical overview of aquafaba. If the liquid looks like water, simmer it gently to reduce it, cool it fully, then test it. If it is already jelly-like when cold, use it as it is.

Aquafaba can aerate batter, but it supplies limited structure after baking. Use a cake formula designed without eggs rather than replacing three eggs in a standard recipe. Our separate aquafaba guide covers whipping, mayonnaise and meringue in more detail.

Baking soda and vinegar do not equal an egg

Baking soda and acid produce carbon dioxide. They can lift a batter, but do not bind it, emulsify fat or build a lasting framework. Use them to improve the aeration of a mixture already held together by flax, starch or flour. Too much baking soda leaves a soapy taste.

Aquafaba meringue, mousse and macarons

Start with a completely grease-free bowl. Whip the aquafaba to soft peaks, then add sugar gradually. A few drops of lemon juice or a little cream of tartar may help stabilise the foam. Watch the peaks rather than the clock because the whisk, temperature and concentration of each can change the timing.

For crisp meringue, pipe and bake at low heat until the pieces release from the paper, then let them dry in the switched-off oven. Beige colour or a sticky surface usually points to excessive heat, insufficient drying or humid air. Macarons are less forgiving. Follow a formula developed for aquafaba and weigh everything.

Aquafaba is not whipped cream. It makes foam but lacks the fat responsible for cream’s mouthfeel. Chocolate supplies that richness and firms up in the fridge in a chocolate mousse. See our no-bake vegan desserts for more suitable formulas.

Eggless quiche, omelet and patties

Chickpea flour

For a plant based omelet, mix one part chickpea flour with about 1.5 to 2 parts water by weight. Rest for 15 minutes, season and cook fully in an oiled pan. A thin batter tears; a very thick one can remain pasty in the centre. For quiche, combine chickpea flour with silken tofu or plant cream to balance firmness and creaminess.

Resting hydrates flour, but does not make raw flour safe. The FDA treats flour as a raw food. It may contain pathogens including Salmonella and E. coli, which adequate cooking destroys. Do not taste raw chickpea batter merely because it contains no egg.

Firm tofu

Crumble 100 to 150 g tofu per person for a scramble. Cook watery vegetables first, then add the tofu. Turmeric makes it yellow but does not create egg flavour. Kala namak supplies a sulphurous note; use it sparingly because it is still salt. Tofu is the protein component here, not a perfect chemical imitation of egg.

If soy is unsuitable, chickpea omelet is easier than a long mixture of specialist replacements. Our guide to cooking without soy lists other protein bases.

Patties and vegetable loaves

Flax gel, hydrated breadcrumbs, thick bean purée and starch can all bind a mixture. Start small, shape one test patty and cook it. If it falls apart, add binder. If it is rubbery, add vegetables or a little fat. One cooked test gives better information than a universal ratio.

Mayonnaise and other emulsions

For soy mayonnaise, put 100 ml unsweetened soy drink, 1 teaspoon mustard and 1 tablespoon vinegar or lemon juice in a narrow jug. Blend with a stick blender while gradually adding 150 to 200 ml neutral oil. Keep the drink and oil at similar temperatures. If the mixture remains thin, add the oil very slowly. Counterintuitively, mayonnaise contains much more oil than aqueous liquid.

For aquafaba mayonnaise, begin with 45 to 50 ml aquafaba and add 120 to 180 ml oil depending on the desired thickness. Aquafaba concentration varies, so stop once the sauce holds. A split sauce can sometimes be rescued by placing a spoonful of soy drink or aquafaba in a clean jug and blending in the failed mixture little by little.

These sauces contain no raw egg, but they are not sterile. Use clean equipment, refrigerate promptly, serve a small amount and return the rest to the fridge. The World Health Organization stresses cleanliness, separating raw and cooked foods, thorough cooking and safe temperatures. Discard sauce left warm for a prolonged period or showing a changed smell, colour or texture.

Breading and glazing

For breading, make a light coating from flour and water, or use starch mixed with water. Dip the food, coat it in breadcrumbs, press gently and leave it for five minutes before cooking. Plant drink alone can work on a floured surface, but sticks poorly to wet vegetables.

For buns and pies, mix 2 tablespoons plant drink with 1/2 teaspoon oil. A small amount of syrup encourages browning on sweet dough. Brush baked goods with light syrup after cooking if you want more shine. None gives exactly the lacquered finish of yolk, but each controls colour better than oil alone.

Allergy safety: one swap may introduce another allergen

Egg is one of the nine major allergens recognised in the United States, alongside milk, fish, crustacean shellfish, tree nuts, peanuts, wheat, soy and sesame, according to the FDA. European and Swiss labelling rules cover further substances, including lupin.

An egg-free recipe is not automatically suitable for everyone. Tofu, soy drink and some yogurts contain soy. Almond drink contains tree nuts. Chickpea flour and aquafaba come from legumes. Anyone with a diagnosed allergy should follow their allergist’s advice. Packaged egg replacers may contain wheat starch, lupin or manufacturing traces.

When cooking for an allergic guest, read every packet, clean utensils and avoid shared ingredient bins. Do not describe food as “allergen-free” if you cannot control cross-contact.

Nutritional differences

A technical replacement is not necessarily a nutritional equivalent. Applesauce mainly supplies water and carbohydrate. Flax and chia add fibre and alpha-linolenic acid, though the portion is small. Tofu and chickpea flour contribute more protein. Aquafaba adds little protein in normal culinary quantities.

If eggs disappear from the diet regularly, assess the whole day rather than one cake. Pulses, tofu, seitan if gluten is tolerated, dairy foods and fortified alternatives can all contribute. Our plant protein guide helps with meal planning.

Vitamin B12 needs separate attention. The NHS lists dairy, eggs and fortified foods among vegetarian sources and says vegans need a reliable source. Flax gel, banana and aquafaba do not replace the B12 in egg. Check labels on fortified drinks and yogurts, and read our vitamin B12 guide.

Troubleshooting

The cake is heavy

The replacement bound the ingredients but did not aerate them. Also check the age of the baking powder, the pan size and mixing. Prolonged beating after flour is added develops gluten. Next time, use less purée, choose an eggless formula, or fold in whipped aquafaba if the recipe supports it.

The centre is gummy

The batter probably contains too much water or gel, or needs longer cooking. Weigh applesauce and yogurt rather than filling a cup by eye. Let the cake cool before judging its crumb because starch firms as it cools.

Patties fall apart

The vegetables released too much water or the binder did not hydrate. Drain the mixture, let it rest and cook a test patty. Do not add a large amount of flour all at once.

Meringue collapses

The bowl may be greasy, the aquafaba too dilute or the sugar added too fast. Reduce watery aquafaba and cool it before whipping. Firm foam can still become tacky in damp weather, so extend low-temperature drying.

Mayonnaise stays runny

The jug may be too broad or the oil entered too quickly. Use a container only slightly wider than the blender head. Start again with a spoonful of fresh aqueous base and slowly blend in the failed sauce.

Three dependable starting formulas

Fruit muffins

In a recipe designed for one egg, use 60 g applesauce and keep the stated baking powder. If the batter already includes lots of banana or courgette, use flax gel instead. Bake one muffin first to check consistency and timing before filling the whole tray.

Vegetable quiche

Blend 300 g silken tofu with 40 g chickpea flour and 80 to 120 ml soy drink. Add mustard, pepper and herbs. Pour over 350 to 450 g cooked, well-drained vegetables. Bake at 180°C until the centre is set, then wait ten minutes before slicing.

Vegetable patties

Combine 400 g cooked, well-drained vegetables and pulses with one flax gel and 40 to 60 g breadcrumbs or oats. Rest for ten minutes. Adjust after cooking a test patty, then cook the rest. This also works in a vegetarian batch-cooking plan if cooked portions are cooled promptly.

Frequently asked questions

Can I replace three eggs in any cake?

Usually not without other changes. A simple swap often works for one egg. With three or more, eggs probably supply a large share of the structure and volume. Choose a recipe developed without eggs or rebalance liquid, fat, binder and raising agent.

Is homemade or canned aquafaba better?

Canned is more predictable. For homemade aquafaba, keep chickpea cooking water, reduce it if thin and cool it. The 2025 review shows that water ratio and processing alter performance, so one reduction time cannot work for every pot.

Is commercial egg replacer better?

It can be convenient and repeatable in cakes and cookies. Read the instructions: some contain only starch and gums, while others include a raising agent. They may not work for omelets or meringue.

Does kala namak replace an egg?

No. It supplies a sulphurous aroma, but no binding, protein or volume. Use it as seasoning with tofu or chickpea batter.

Is eggless raw batter safe to eat?

No. Raw flour may carry harmful bacteria. Cook cake, cookie and chickpea batters before tasting them.

Sources

• Aquafaba: properties, uses and starting ratios
• 2025 review of aquafaba’s technological and sensory properties
• King Arthur Baking: practical egg-replacer tests
• FDA: food allergies
• FDA: raw flour safety
• WHO: food safety
• NHS: a balanced vegetarian diet
• Egg as food: composition and cooking behaviour
• Flax: mucilage, storage and composition
• Chia seed: composition