2 ripe bananas (200g/7oz peeled weight), mashed
175g/6oz plain flour
陆 teaspoon bicarbonate of soda
175g/6oz golden caster sugar
陆 teaspoon ground cinnamon
75驳/2陆辞锄 pecans (or walnuts), roughly chopped
pinch salt
75驳/2陆辞锄 dark chocolate chips
150g/5陆oz unsalted butter, at room temperature
1 medium egg, lightly beaten