Egg substitutes in baking: match the function

Replace the egg’s function, not just its volume

An egg can bind ingredients, supply moisture, build foam, and set during baking. A flax mixture may bind a roll while failing to provide the whipped structure of a sponge cake. Start by checking whether the recipe beats eggs to a foam, separates whites and yolks, or relies on eggs to set a custard.

Two documented applications with quantities

King Arthur’s egg-substitution guide names aquafaba in its Fudge Brownies and flax replacement in Amish Dinner Rolls. Its reported results belong to the publisher.

Scroll the table sideways if needed.

Recipe context: Fudge Brownies and Amish Dinner Rolls. The totals are explicit arithmetic from the guide and current egg counts; we have not independently tested the adapted batches. King Arthur reports rich, moist brownies with aquafaba and the same roll flavor with flax. It does not establish identical performance in every brownie or enriched bread.

Know what each option cannot promise

The guide says flax does not aerate well and excludes rich doughs such as brioche from that recommendation. Purées can add flavor and make cookies cakier; large amounts can make some bakes gummy. Greek yogurt is an option in some formulas but does not make them vegan.

For custards or cakes whose structure depends heavily on whipped eggs, choose a recipe developed without eggs. A binding mixture is not a ready replacement for cooked custard or whipped whites. Aquafaba can be whipped, but a foam recipe needs its own proportions and method rather than the whole-egg brownie calculation above.

For a commercial replacer, use its package preparation instructions with a suitable formula. Record the exact brand, quantity, and batch result. Egg-free performance, vegan ingredients, and allergy-safe preparation are separate checks.