I crushed some Oreo's to make the base, press it in the bowl and spread the melted ice cream on top. I put it in the freezer for 20 minutes to make the ice cream harden again and I repeated the process: another layer of crushed cookies and one more of melted ice cream. Then I took care of the topping: a sprinkle of puffed rice, some chopped nuts and the remaining crushed cookies I didn't use inside the cake. Put in the freezer and this is all