Step 1

Preheat oven to 170C fan forced. Grease a 20cm x 10cm rectangle loaf tin and line with baking paper.

Step 2

Beat butter and caster sugar in the bowl of an electric mixer until light and fluffy. Add the eggs and beat to combine. Add the flour and yogurt and beat at a low speed to combine. Increase speed to high and beat for 60 seconds. Spoon half of the mixture into the prepared tin. Scatter over half the chocolate and half the berries. Add the remaining cake mixture and smooth top. Scatter over the remaining raspberries and chocolate.

Step 3

Bake for 65-70 minutes, leave to cool in the tin.

Step 4

Dust with icing sugar to serve.