Preheat the oven to 180°c (160 fan/ Gas 4) and grease and line a 2lb loaf tin with baking paper.
Cream together the butter, caster sugar and light brown sugar in a large mixing bowl.
175 g Unsalted Butter, 100 g Caster Sugar, 75 g Light Brown Sugar
Beat in the eggs and vanilla extract.
3 Large Eggs, 1 tablespoon Vanilla Extract
Sift in the flour and fold in gently.
200 g Self Raising Flour
Stir through the mashed banana and chocolate chips.
2 Black Bananas, 200 g Chocolate Chips
Spoon the banana bread batter into a greased and lined 2lb loaf tin and bake for 1 hour - 1 hour 10 minutes until a skewer comes out clean.