Although this recipe doesn't require an egg substitute, there are many available, The one you use will depend upon the recipe. For example, if you wanted to replace egg in this recipe, you could use flax eggs. Flax eggs are made by mixing 2 tablespoons of ground flax seed with 6 tablespoons of water. The mixture thickens when you refrigerate it for 30 minutes (or 10 minutes in the freezer) acting like a binder.