Banana Bread: I haven't done a tremendous amount of fiddling with this, but I did once make it, for friends who are more chocolate-crazed than I am, by replacing 25g of the flour with good cocoa powder (not drinking chocolate) and adding 100g of dark chocolate, cut up into smallish chunks. And you could just as easily use the chocolate chips sold in the baking aisle of supermarkets.
Banana Bread - Nigella Lawson recipe. While the recipe recommends simmering the raisins in rum before adding to the cake mix, I prefer apple juice or whatever juice might be in the fridge - it is sweeter.
This is the best banana bread I have ever had. I buy really ripe bananas just so I can make this :-) Got the recipe years ago from my friend Rachel. We used to beg her to make this for us in college! I think the moistness is due to the 1/2 cup of oil - I didnt say it was the healthiest banana bread around, but it is worth the extra time on the treadmill!