This is great for diabetics. For the sugar, I use either Z Sweet or the "0 Sugar" Product made by Wholesome sweetners.
For the egg substitute I use Bob's Red Mill Egg Replacer - you mix 1 Tablespoon with 4 Tablespoons water.
This is a recipe I modified from Martha Stewart's website. It's very tasty. Can be made in a round cake or 9x9" brownie pan or I use a 9 serving mini loaf pan to make little individual cakes.
On the sugar, make sure what you use is vegan. I use organic evaporated cane juice sugar. Regular sugar is often processed with animal derivatives.