Though made famous by the show, the chocolate cake is a star in its own right and won over our recipe testers and editors with its airy chocolate mousse filling, cocoa-forward frosting ...
Add the egg, beating until fully combined, then briefly mix in the vanilla ... comes to chucking things into this cookie dough, but be aware that for this recipe 250g/9oz of additional ingredients ...
Add the pecans (or walnuts), chocolate chips and mashed banana and mix again until all of the ingredients are thoroughly incorporated. Cover the bowl and chill for 1 hour (see Recipe Tips).