Sugar - I used demerara sugar for this recipe. I'm sure you could use an equal amount of
coconut sugar.
Vegan and egg-free - I'm sure that you could try making this recipe vegan or egg-free by replacing the egg whites with 2 teaspoons of ground flax seed and 4 teaspoons of warm water. Let sit for 5 minutes, then use in recipe. I have not tested this, but it's where I would start. That, or an equal amount of apple sauce or banana puree.
Baking soda and baking powder - if you are going to use conventional baking powder or baking soda (not the Ener-G brand), reduce the measurements by half than what it calls for in the recipe.