Hey great score Dave! You've absolutely GOT to try the chocolate orgasm.
Step 1: Make yourself a hot chocolate or milk coffee
Step 2: Extract a Tim Tam from the packet and take a small bite off diagonal corners
Step 3: Place one of the bitten off corners in the hot chocolate/milk coffee
Step 4: Suck the preferred beverage through the other bitten off corner like a straw
A chick back in university showed me how to do this. Teach your girlfriend/wife how to do it and you may enjoy some iced vo-vo later in the evening!