Blend up all of the biscuits until they resemble bread crumbs, save ¼ (about 50g (¼ cup)) for later.
2. Step
Add the cream cheese and blend again for another 30 seconds or so until everything is combined but not a dough.
3. Step
Form the mixture into about 8 little balls using your hands and refrigerate on baking paper for 1 hour.
4. Step
Break the chocolate into small squares and melt it. This can be done in the microwave by heating on full for 30 seconds at a time and stirring, repeating this process until creamy.
5. Step
Coat the custard cream balls with the chocolate and then with the leftover blended biscuits.