Cookies punched from light tan styrofoam, fabulous idea! I would use white styrofoam cause I've never seen the beige, you could color it beige using a marker.
Take and old Tic-Tac container, then crumble little pieces of brown CARD STOCK paper. If you do regular paper it will come out weird and it may rip! I also used pony beads to make Trixâ„¢.