When I was younger, I always wondered how the pattern on a marble cake was created! It looked so pretty when it was sliced, and the chocolate aroma used to pervade the room. As always, quality ingredients are crucial, so do make sure the cocoa powder is of great quality, as the success of the final result will depend on it. You may need a little practice to perfect the technique of folding and swirling the mixture, but the chocolate aroma will make it all worthwhile. Don’t forget to drizzle over the citrus syrup while the cake is still warm so the liquid gold can gently find its way down this beautiful cake.