Heat the oven to 180°C
Grease the baking tin 20x20cm with vegetable oil
Mix sugar, unsweetened applesauce and water
Mix the ground flaxseed with water and add to the apple sauce mix together with the vanilla extract
Mix the flour, bakingpowder, salt, pure cocoa powder, fondant chocolate and optionally chopped pecans or walnut, and add to the apple sauce mix
Pour it into the baking tin and bake for 40 minutes
If you want it firmer, bake a little longer
Let it cool before cutting