What are some common egg replacements used for baking?
You can use bananas and applesauce as egg substitutes because they add moisture to baked goods. However, they do not help baked goods rise, so you should add baking soda as well. Tofu is the best egg replacement in baked dishes such as quiches or fritattas. Commercial egg substitutes, such as Ener-G, are available at most large grocery stores. There are relatively flavorless and work best in cakes, muffins and cookies. Source: vegetarian.about.com