For anyone who doesn’t know, a 'Tim Tam Slam' involves biting both ends off a Tim Tam biscuit and using it as a straw to drink tea or coffee.
The biscuit melts quickly and must be eaten before it crumbles apart.
'Woah, it like legit works, it's melting from inside out!' Kendall says in the clip. 'Look at this, how crazy is this... it's totally soggy!'
Despite incorrectly referring to a 'Tim Tam Slam' as a 'Tim Tam Bomb', both Kendall and her make-up artist said they would 'highly recommend' it.
Kendall was the star attraction at the Tiffany & Co event, wearing a pink tourmaline and sapphire butterfly necklace from the Tiffany Blue Book Collection, which features over 400 pink sapphires!
Other hight-profile guests included Lara Worthington, Jesinta Franklin, Victoria Lee.