The yoghurt as an ingredient in this cake helps to keep it moist whilst depth is provided in the use of muscovado sugar.
Something else. you can add pineapple juice or lime juice instead of the orange juice. i am sure there wont be a very different taste. just depends on what you have in hand - 15 Nov 2008 (Review from Allrecipes UK & Ireland)
Apple or Pineapple instead of Orange juice? Have I missed something? - 24 Nov 2008 (Review from Allrecipes UK & Ireland)