Vegan cooks let the recipe determine the best egg substitute, such as using one banana to replace one egg in sweetbreads and cakes. Diet soda, applesauce, flax seeds and instant mashed potatoes make good egg substitutes in other recipes. Tofu with peppers and onions makes a delicious egg-like scramble.
Use one can of diet soda to replace two eggs, or use 1/4 cup of applesauce to replace one egg in cake recipes. When a recipe calls for a binding agent, two tablespoonfuls of instant mashed potatoes replace one egg or one tablespoonful of ground flax seeds and three tablespoonfuls of water make a thick, jelly-like replacement for one egg.