This could so easily have been a disaster! A last minute panic after a day of indecision about what to cook left me no time to chop chocolate or nuts, no time to bring the butter up to room temperature and no time to faff about with a complicated recipe. So after a short burst of microwaves for the butter, all the ingredients for this cake were thrown into one bowl and beaten until smooth. I also had to bake with the fan on, as I was starting to cook dinner while the cake was baking - I much prefer to bake cakes in a conventional oven.
Fortunately things worked out OK. Thanks to the yogurt, the cake crumb was moist and close textured, but still light. In an ideal world I would have added more chocolate chips to the cake mixture (I only had 50g), but the chocolate crumb topping helped the balance between chocolate and orange flavours.The cake was still warm when the CT ate his first slice, but I told him to think of it as a pudding!