To make a flax egg, mix one tablespoon ground flaxseed meal with three tablespoons of water. Mix together, and let sit in your fridge for 15 minutes to set up and thicken
https://jessicainthekitchen.com/how-to-make-a-flax-egg/
To replace an egg, I used 1 tablespoon of chia seeds mixed with 3 tablespoons of water and let the mixture sit for 15 to 20 minutes or you can prepare it the night before. Mix the chia seeds and water together in a small bowl and let it sit for 10 - 15 minutes until the mixture becomes gel.
http://www.fussfreecooking.com/recipe-categories/kitchen-tips/chia-seeds-gel-as-egg-substitute-in-baking/
Banana & Applesauce
Last but not least, are staples you probably already have in your kitchen to help with your egg-free baking. 1 ripe banana can be substituted for every egg needed in a chewy baked good (like brownies) and 1 tablespoon of applesauce also equals an egg in most recipes. Sometimes I find it may take a few extra minutes in the oven when I go this route so just keep your eye on it.
