Process biscuits until fine crumbs .

Add the 80g of butter and vanilla sugar and process till combined .

press the biscuit mixture over the base and half way up the sides of a 22cm round springform pan then refrigerate for at least 30 minutes to set .

Place boiling water into a heatproof jug and sprinkle over gelatine and whisk with a fork until dissolved , set aside to cool .

Using an electric mixer beat the cream cheese and the half cup caster sugar together until light and fluffy then gradually beat in gelatine and then the cream , beat until combined . then fold in the chopped up mars bars to the cheese mix .

To make the chocolate sauce : place the chocolate and 2 tablespoons of the cream in a heatproof bowl and melt the chocolate until smooth , either in the microwave or over a pot of simmering water .

To make the butter scotch sauce : place the brown sugar , 20g of butter and 2 tablespoons of cream into a small saucepan and stir on low heat , without boiling , until the sugar has dissolved .

pour half the cream cheese mixture over the prepared biscuit base then drizzle half the chocolate sauce over followed by the butter scotch sauce and run a knife or skewer through the mixture to create a marble effect then top with remaining cream cheese mixture and chocolate sauce and butter scotch sauce and run knife or skewer through again to create a marble effect on top .

refrigeratorate over night or until set . enjoy . :-) .