Freeze the Italian cream in a 6-in/15-cm cake pan that has been lined with plastic wrap. Remove from the pan and trim into a 5-in/13-cm round. Reserve in the freezer.
Spread the coffee crispy base on one layer of the devil’s food cake, wrap tightly, and freeze until completely set.
Place a 6-in/15-cm cake ring on a flat sheet pan lined with plastic wr