I used pumpkin for the applesauce (I just prefer the texture it gives over the more cakey applesauce) and did 2 parts ww pastry to 1 part garbanzo bean flour (for extra fudginess). (isachandra.com)
As well as the spices I added a little cocoa powder for extra richness and used mostly brown sugar for fudginess. (tinandthyme.uk)
Melted chocolate in the batter gives The Ultimate Triple Layer, Fudgy Brownies their dense fudginess. (foodtasia.com)