2tsp baking powder
125g margarine or butter (very soft)
4 mashed bananas (ripe as possible!)
2 eggs (lightly beaten)
1tsp vanilla extract
250g caster sugar
175g chocolate (can be cheap as u like and either chips or pieces, I prefer large-ish pieces)
Sift baking powder and flour - set aside
Mix all other ingredients together (mix very well-you will know it's right if it looks disgusting!)
Add wet ingredients to dry, stir until just combined, don't over mix!
Pop in tin and bake for 1hr 15mins, if the top starts to go too brown toward the end pop some foil on the top to prevent burning. (You probably won't get a clean cake tester if u poke it in because u will either hit a patch of chocolate or banana and it will come out gooey so don't bother..just cook for the full time)
Cool in tin for 5mins (while u make tea) then onto cooling rack where it should be eaten immediately for optimum gooey banana cake experience!