In a microwave safe bowl, pop in the custard, milk chocolate and caramel flavour.  Place in the microwave, and microwave on 30 second bursts stirring in between. Do this until the chocolate has melted and it is smooth. Pop in the fridge for 1 hour .

In the meantime, crush the Oreos, to resemble soil. You can do this by either popping in a bowl and crushing with a rolling pin or popping in an electric chopper and crushing. Set to one side. 

Now it is time to layer the desserts. First place the custard into the bottom of the cup, then a layer of Oreos and then another layer of custard before the last layer of Oreos.  

Time to get creative and decorate the top as spooky as you can with the sprinkles and toppers.