1- bake the cake as it's written in the box

dip the biscuits inside the milk for three seconds and spread them in thae plate you are using

for the topping in a low fire mix the cream , milk whipped cream and chocolate togather until the mix become smooth

after that when the cake is cooled .. smash it and then add one layer of the biscuits in the pan then the smashed cake then again a layer of biscuits and again smashed cake . if u want you can add another layer of the biscuits .. and yeah don't forget to spread the mix between layers and then spread the full mix on the top of the layer

leave it in the fridge for one hour before serving it

and you can add any kind of decoration on the top