For a simple muffin or quick bread, 1/4 cup applesauce or mashed banana can replace one large egg. For binding in cookies or bars, a flax egg is another option. Neither is a universal replacement for the lift and structure of whipped eggs.
Start by reading the method. Does it just stir the egg into a batter, or beat several eggs into a thick foam? That difference matters more than finding a single “best” substitute.
Amounts for one large whole egg
| Substitute | Amount | Best starting point |
|---|---|---|
| Applesauce | 1/4 cup | Moist muffins and quick breads |
| Mashed banana | 1/4 cup | Bakes where banana flavor fits |
| Flax egg | 1 tablespoon ground flax + 3 tablespoons water | Binding in lower-rising bakes |
| Aquafaba | 1/4 cup liquid from canned chickpeas | Simple stir-together batters |
The fruit amounts come from King Arthur's egg-substitution trials. Fruit purée adds moisture but can make cakes denser and cookies softer or cakier. Banana also brings its own flavor. Don't expect the original texture to stay identical.
Making a flax egg
Mix the ground flax with the water and leave it for 5–10 minutes, until thickened. Use the whole mixture. Whole flaxseeds won't give you the same mixture as ground flax meal. King Arthur's flax method explains the binding effect and its limits.
This adds body, but it doesn't replace the air held in beaten egg whites. For a delicate sponge, use a recipe developed without eggs.
Aquafaba: whole eggs and whites use different amounts
King Arthur's egg-free baking guide uses 1/4 cup for a whole egg and 2 tablespoons for an egg white. Its advice is to use liquid from canned chickpeas, since homemade chickpea cooking liquid is less consistent.
Aquafaba can whip, but that doesn't make it a direct swap in our macaron recipes. Macarons and angel food cake depend heavily on the structure of whipped whites; choose a specifically developed egg-free recipe for those.
What about a boxed egg replacer?
Follow that brand's directions. For example, Bob's Red Mill Gluten Free Egg Replacer uses 1 tablespoon powder with 2 tablespoons water for one whole egg, rested for one minute. That ratio doesn't apply to every product called egg replacer.
If you're also out of leavening, here's the baking powder substitute calculator. Replacing an egg doesn't replace the baking powder already listed in your recipe.
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