• 1 cup softened butter
• 1 cup caster sugar
• 1 cup self raising flour
• 4 large eggs, beaten
• 3 tablespoons milk
• 3 tablespoons cocoa powder
• 1 large zest and juice orange
• 1/ 3 cup chopped dark chocolate

Method

• Step 1

  Preheat the oven to 200ºC or 395ºF, gas mark 6. Whisk the butter, sugar, flour and eggs together in a bowl until smooth, and then transfer half the mixture into a separate bowl.

• Step 2

  Beat the milk and cocoa powder into one bowl of mixture. Beat the orange zest and juice and the chopped chocolate into the second bowl of mixture.

• Step 3

  Then drop spoonfuls of the mixture alternately into the loaf cases. Using a fork or a skewer, lightly ripple the mixtures together to create a marble effect. Sprinkle lightly with the extra sugar and bake for 15-20 minutes until the cakes have risen and are firm to the touch. Leave to cool completely before serving

• Step 4

  For a full-sized loaf, use a 900g greased and lined loaf tin and bake at 180ºC or 355ºF, gas mark 4 for 45-50 minutes. I’ve topped mine with a chocolate ganache frosting using Valrhona chocolate and chocolate buttons