Substitute for Eggs in Baking

An egg does three separate jobs in baking. Its proteins coagulate in the oven and bind the crumb, its whites hold air when beaten and help leaven, and its water adds moisture that turns to steam. No single substitute does all three. Before choosing one, work out which job the eggs are doing in your recipe: in cookies and brownies it is mostly binding, in a sponge it is mostly lift, in a muffin it is a bit of each.

Binding: cookies, brownies, muffins

Flax and chia eggs are the binders. The seed gel glues crumbs together much as cooked egg protein does, and King Arthur Baking and the University of Wisconsin Extension both give the same 1 tablespoon to 3 tablespoons of water ratio. Let the gel sit until it is thick and sticky before mixing, then add it where the recipe adds eggs. Because the gel holds no air, expect brownies to be fudgier and cookies to spread a little less.

Leavening: meringues and light cakes

Aquafaba is the only common swap that whips. Bob’s Red Mill gives 3 tablespoons per whole egg, 2 per white and 1 per yolk, measured unwhipped; King Arthur suggests up to ¼ cup per egg in its guide, so use the upper end in drier batters. For a cake that relies on beaten eggs, whip the aquafaba to soft peaks before folding it in. It holds bubbles well but sets weakly, so let cakes cool fully in the pan before turning them out.

Moisture: quick breads and snacking cakes

Applesauce, banana and silken tofu replace the egg’s water and some of its body. They suit forgiving batters where a slightly dense, moist crumb is welcome. Bake a few minutes longer and test the center with a skewer, since the batter carries more water and no protein to set it.

When not to substitute

Egg-heavy dishes fail with any swap: soufflés, custards, quiche, flan, pumpkin pie, sponge and chiffon cakes, and angel food cake. In all of them the egg is the structure itself. Aquafaba can stand in for whites in a meringue, but a whole angel food cake made from it rarely holds its height. Gluten-free baking is also risky, because eggs often provide the structure that gluten would. In these cases, choose a recipe written to be egg-free.

For an egg allergy, check commercial egg replacers and packaged egg substitutes carefully: some liquid egg substitutes sold in cartons are made from egg whites.

Common mistakes

• Skipping the rest time. Flax or chia mixed straight into batter has not gelled yet, so it binds poorly and leaves watery pockets.
• Using whole flaxseed. The seeds pass through unchanged; only ground flax releases enough gel.
• Swapping every egg in a rich cake. Four eggs replaced with fruit purée gives a wet, sunken middle.
• Overmixing after adding aquafaba foam. Stirring knocks out the bubbles that were meant to lift the cake.