OK, it's safest to avoid experiments with cakes but i've started this nasty habit! i know thomas will gum it down as long as it tastes good. i tried this with my standard carrot cake recipe and won accolades.
grated carrot-11/2 cups
finely chopped pineapple-11/2 cups
cocoa powder-1 tbsp
instant coffee powder-1/2 tsp
nutmeg powder-11/2 tsp
cinnamon powder-11/2 tsp
and all the other ingredients mentioned below in the carrot cake recipe
I did not finely chop the pineapple. i ran it quickly in the chopper once. it's not the ideal thing to do as it becomes a sticky mass but nothing suffers.
You can add tutty fruity and cherries and use drinking chocolate powder instead of cocoa. it's voila again but consider the sweetness of the chocolate powder while adding the sugar. if you use drinking chocolate powder add 2-3 tbsp of it and reduce the sugar quantity to 21/4 cups.