Step 1

Preheat oven to 180C/160C fan forced. Grease and line the base and sides of an 11 x 21cm (base measurement) loaf pan, allowing the edges to overhang.

Step 2

Sift flour, cacao, baking powder and bicarb soda into a large bowl. Reserve 1 tablespoon oats. Add remaining oats and chocolate to bowl. Stir to combine. Make a well in centre.

Step 3

Whisk maple syrup, buttermilk, oil, eggs and vanilla extract in a jug. Add buttermilk mixture and banana to dry ingredients. Stir until combined. Pour into prepared pan. Sprinkle with reserved oats. Bake for 1 hour 15 minutes or until a skewer inserted in the centre comes out clean. Cool in pan for 10 minutes. Transfer to a wire rack. Serve warm or at room temperature.