Tim Tams is an Australian cookie, manufactured by Arnott's. Consists of two layers of malted biscuits, separated by a chocolate cream filling, and covered in chocolate. You get them in most supermarkets.
To start, you bite tiny corners off your cookie, opposite corners!
You need a cup of steaming coffee. Put the one "bit off corner" in the coffee and the other one in your mouth, now suck till you taste the coffee. You then take the whole cookie and put it in your mouth...FAST! Otherwise the cookie will disintegrate :-)
You will repeat this over and over and over again.... :-)