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Method
Make it happen
- 01
Heat oven to 170°C fan and line a 2 lb loaf tin.
- 02
Cream butter and brown sugar, beat in eggs, then fold in banana, flour, vanilla and half the milk.
- 03
Transfer a third of batter to a small bowl and stir in cocoa with remaining milk. Alternate spoonfuls of plain and chocolate batter in the tin, then swirl once with a knife.
- 04
Bake 45–55 minutes until a skewer comes out clean. Cool 20 minutes before slicing.