Whisk together vigorously. Allow it to sit for 5-minutes (or up to 30-minutes) to gel-up and become an egg white consistency.
Use in baking recipes. One flax egg = one regular egg.
If preferred, simply place flaxseed or flax meal in blender with water and blend. Stop to scrape down sides blend another few seconds. This makes the flax egg very thick and smooth, and it eliminates the need for allowing it it sit. The egg can instead be used immediately in baking.
Video
Notes
Tips & Substitutions:
Flax eggs can usually be substituted in recipes calling for regular eggs at a 1:1 ratio. That means, if a recipe calls for 1 egg, you could use one flax egg as a replacement.
Chia seeds will work well as a flax substitute. Substitute the chia seeds equally, grind the seeds, and use them just as described here for the flax seeds.
Flax meal is just flaxseeds that have been ground up. So if all you have on hand is whole flaxseeds, simply grind those seeds up in your blender or coffee grinder to make flaxmeal.
Flax eggs work best in recipes that require eggs for binding, such as pancakes, muffins, and cookies. However, they may not provide the same results in recipes that rely on eggs for their leavening properties, like soufflés or meringues. They will also not work for scrambled eggs.