What type of cookie to use, when an Australian recipe calls for "crushed biscuits"? I have a recipe from my teenage years in Australia for a bar cookie called "Cherry Crunch". It includes cashews, arrowroot, cocoa and "biscuits", among other things. I know that biscuits are cookies, but have no idea what type of cookie to use. I'm assuming it would be something rather plain?
As an Australian we seem to use Arnott's Milk Arrowroot or Arnott's Milk Coffee biscuits in a lot of recipes.

Milk Arrowroot