Preheat oven to 180oC. Put large saucepan on stove, on medium heat. Add butter and milk, stir until butter is melted. Remove from heat.

Sift flour and cocoa into a medium bowl. Stir the caster sugar and vanilla essence into warm butter and milk mixture, add the sifted ingredients and stir to combine.

Spray oven proof dish with canola spray. Dish should have volume 1.5L approx. Pour chocolate mixture into dish.

4. Sift brown sugar and extra cocoa powder (use a spoon to push through sugar if needed) over chocolate mixture.

5. Gradually pour the boiling water over the back of a wooden spoon onto the chocolate mixture. Put the pudding into the oven and bake it for 50min or until skewer comes out clean.

Leave to sit for 5 minutes then sift icing sugar over the top to serve.