6 very ripe bananas
450g/1lb plain flour
2 tsp baking powder
335驳/11陆辞锄 caster sugar
1 tbsp ground cinnamon
1 tsp ground cloves
225g/8oz pecans
225g/8oz raisins
陆 tsp salt
125ml/4陆fl oz vegetable oil
115g/4oz butter, softened, plus extra for greasing
4 free-range eggs