Michelle Darmody: How to bake the ultimate chocolate traybake for large groups

This cake is a birthday classic

This cake is ideal for birthday cakes, and can be stacked on top of itself without collapsing

It is birthday season in our family and I am always asked to make cakes of various sizes and in various complicated shapes.

This year hedgehogs have ruled supreme and have involved many finger biscuits stuck into the icing and a cute little face fashioned out of fondant.