4 1/3 cups milk
200g dark eating chocolate
½ cup caster sugar
3/4 cup cornflour
2 tablespoons cocoa powder
6 egg yolks
1 1/2 teaspoons vanilla extract
1 x 250g pack Arnott’s Sao biscuits
Chocolate Ganache Topping:
200g chocolate, chopped
80g butter, chopped