You make up the pudding mixture and put it in the dish, then cover it with dark brown sugar and cocoa and then pour boiling water over the whole thing!
What happens is that the sponge rises to the top and you have a lovely chocolate sauce in the bottom of the dish.
Lovely, rich, sticky and gooey pud.
On Saturday I served it with soured cream. I then divided the remaining pudding into ramekins and on Sunday reheated it in the microwave and served with ice-cream.
I would thoroughly recommend this pud. You get between 6-9 servings, depending on how greedy you are!
I'm entering this for the February Forever Nigella challenge #12 at Maison Cupcake