This is one of those recipes that came about by pure accident. I was meant to make truffles yesterday and everything was going great until I added too much orange juice to the truffle mixture. This morning when I wanted to make the truffles, the mixture was just ever-so-slightly too soft to roll into balls. So my mind started working over time as I just could not waste this deliciously silky chocolatey ‘mess’. And then it came to me, use it as the filling for a cake. The oven was switched on and the scale was taken out and off I went into baking mode. I used the German Chocolate…