Corn starch is a very useful ingredient in vegan baking. Any time you come across a recipe that calls for an egg, you can use corn starch in its place! Simply mix together 3 tablespoons of warm water and 1 tablespoon of cornstarch for every egg. In doing so, you will have an excellent egg substitute for things like biscuits, cookies, bread, and cakes. And as we’ve already discussed, corn starch acts as a wonderful thickening agent. Many people actually prefer corn starch over flour due to the former’s ability to create a clear mixture.