Tim Tams are beloved by both Kiwis and Aussies, but trade moves across the ditch could see the yummy treat being sold in the UK - with the British version of the iconic snack being sold in Australia.
If you've not travelled to the UK chances are you've never stumbled across this Great British delight – but thanks to British Prime Minister Boris Johnson's personal mission to get Tim Tams more widely available in the UK, Penguins have just scored a sweet deal to be stocked exclusively in Coles supermarkets in Australia.
So which is better?
Penguin vs Tim Tam
The two biscuits are actually strikingly similar, both consisting of two choccie biscuits sandwiched together with a chocolate cream and coated in more chocolate.
But which one reigns supreme?
If you ask any British ex-pats, they'll tell you a Penguin of course. But Kiwis will defend the iconic Tim Tam to the end.
Mark Schomberg, the development chef at beloved British biscuit maker McVitie's, says the difference between the two can be found in the crunch.
"The key difference is the crunch factor – Penguins have a great bite to them," Shomberg told news.com.au.
"They audibly crack when they hit your teeth, whilst still having that delicious chocolate coating, double biscuit layering and chocolate cream filling."
Since Johnson declared, "I want to live in a world where we send you Penguins" in June, Twitter has erupted in debate between the two nations over the superior sweet treat.
Aussies described Penguins as the lesser version of the transtasman favourite.
Others branded the Penguin a "fake Tim Tam" while another said it would "send those Penguins right back to the UK".
It's a sentiment long echoed on by the two Aussies behind the blog, Sorry Dad, England is Weird, who claim Penguins are the no frills version of Tim Tams.
"Tim Tams taste better. They're rich, decadent and smooth," the post, dated 2009, states.
However, the Brits – who invented the Penguin 31 years before the Tim Tam ever existed – say it is by far the best.
Brits are also known for their love of tea, with which a Penguin pairs beautifully, Shomberg added.
He also said you can do a classy version of the famed Tim Tam slam with one. Talk about drawing battle lines.
"We in England have long perfected the tea and bickie combination," he said.
"We've noticed some rather questionable and lurid tea-drinking performances from our Southern cousins, where we would just dip and sip, in an act called the Penguin Dip."
In case you've been living under a rock, a Tim Tam slam works by biting the opposite corners off a Tim Tam, dipping it into your drink of choice, and then sucking the liquid through the biscuit.
-Additional reporting, NZ Herald