Place 2/3'rds of the chocolate mix onto the base of cake tin and spread it across to the edge
Top with all the ricotta mix taking it right to the edge too
Dollop the rest of the chocolate mix across the top of the ricotta mix leaving a little space from the edge … it will be quite stiff so I find dolloping the mix on easier, and then spread it as best as you can with the back of a spoon (does not need to be perfect)
Use a knife to horizontally place into the cake, then run it lightly through the mixture to create a swirl effect … it will mean some of the top mix will look uneven but don’t worry, when it bakes it will even out beautifully
Place into oven and bake for 1 hour and 15 minutes
Cool in tin before releasing the sides and removing the baking paper from the base
Place on a serving platter and dust with icing sugar before serving
Alternatively top with white chocolate icing and dark chocolate drizzles as described in the notes, and sprinkle edges with icing sugar for a final "florish"