Tim Tam Slam: The Official Rules of Australia's Most Dangerous Biscuit Ritual

Somewhere in an Australian office right now, someone is hunched over their desk, biting the corners off a chocolate biscuit with the focused intensity of a bomb disposal technician. They are not being weird. They are performing a national rite of passage that involves turning a biscuit into a drinking straw, racing against the clock before it dissolves in their hand, and occasionally losing. This is the Tim Tam Slam, and it has somehow never had an official safety briefing.

The humble Tim Tam: structurally sound right up until you try to drink through it. Image: Wikimedia Commons (public domain).

A Biscuit Born From Mild Dissatisfaction With a Penguin

The Tim Tam story starts, as so many great Australian stories do, with someone overseas getting a bit competitive. In 1958, Ian Norris, Arnott's food director at the time, was travelling through Britain scouting ideas for new biscuits when he came across the Penguin, a chocolate-coated British sandwich biscuit that had been minding its own business since the 1930s. Norris tried it, decided it was fine but not great, and resolved to go home and build a better one.

It took six years of recipe tinkering before Arnott's was ready to show the world what "better" looked like. The Tim Tam officially launched in Australia on 10 September 1964, built around the now-iconic formula of two malted biscuits, a layer of chocolate cream filling, and the whole thing enrobed in a chocolate coating. It was not a subtle improvement. It was a direct hit.

Where On Earth Does the Name Come From?

Here is the part that sounds too good to be a real corporate origin story, and yet, it checks out. While Ian Norris was off in Britain eating rival biscuits, Arnott's executive Ross Arnott had been in the United States attending the 1958 Kentucky Derby. The race was won by a colt named Tim Tam, who stormed home and then went on to just miss out on the Triple Crown in the Belmont Stakes a few weeks later. Arnott liked the name enough to keep it in his back pocket, and when the company needed something punchy for its new biscuit, Tim Tam got the nod.

So the single most beloved biscuit in Australia is, technically, named after an American racehorse that an Arnott's executive watched run while he was meant to be thinking about biscuits. There are less believable stories floating around online (a bakery owner called Timothy Tam, a garbled version of "flim flam") but biscuit historians agree those are just internet folklore dressed up as fact. The racehorse is the real one, and honestly, it is the better story anyway.

How the Slam Works (And Why It Became Law)

The mechanics of the Tim Tam Slam are simple enough to explain in one breath and difficult enough to execute that half the country has a story about getting it wrong. You bite off two opposite corners of the biscuit, leaving two small open channels straight through the middle. You dunk one corner into a hot drink, usually tea or coffee, and suck through the other end like it is a straw, because for about four seconds, it is. The hot liquid gets drawn up through the biscuit, melting the chocolate coating and the cream filling from the inside out. The entire biscuit must then be eaten in one go, immediately, before structural integrity fails and your Tim Tam becomes a small chocolate puddle in your drink or, worse, in your lap.

The ritual has picked up a small cabinet of nicknames over the decades, including the Tim Tam Suck, Shotgun, Bomb and Bong, which gives you a fair sense of the energy involved. Arnott's leaned into it properly in 2002 with a "Tim Tam Suck" advertising campaign, effectively giving its own marketing stamp of approval to something customers had already been doing in break rooms for years. It is a rare case of a company's fans inventing the fun bit and the company just turning up later to film it.

From Suburban Kitchens to Global Supply Chains

What started as one Sydney factory's answer to a British biscuit is now an industrial operation. Arnott's bakery at Huntingwood in Western Sydney can turn out roughly 3,000 Tim Tams a minute, chewing through around 20 tonnes of cream filling and 27 tonnes of chocolate coating on a typical working day. In just the original flavour alone, more than 2.8 million packets were sold in Australia in a single recent 12-month stretch, and that is before you count the double coat, caramel, dark chocolate, white chocolate, honeycomb and choc orange variants quietly propping up the supermarket aisle alongside it.

The Tim Tam has also done reasonably well for itself overseas. Pepperidge Farm, Arnott's sister company under the Campbell's umbrella, began importing them into the United States in 2008 and gave the range a proper national launch in 2017, with the pitch "it's not a cookie, it's a Tim Tam" aimed squarely at homesick Australians and curious locals alike. Side-by-side taste tests between the Australian and American versions tend to go the same way: both are crunchy, both are chocolatey, but reviewers consistently rate the Australian filling as firmer and longer-lasting, melting slower under a hot drink rather than collapsing into instant fudge. Indonesia got its own cheese-flavoured Tim Tam in 2011, New Zealanders have spent years arguing that their local Chit Chat is secretly better, and in the US, Trader Joe's eventually gave up waiting and launched its own imitation biscuit in 2021. Imitation, as they say, is the sincerest form of Slam.

The flavour lineup has had some genuinely wild chapters too. 2004 brought a Tia Maria and Kahlua-spiked Mint Slice that drew a complaint from the Australian Drug Foundation. 2014 saw a collaboration with dessert chef Adriano Zumbo for salted caramel, choc brownie and raspberry white chocolate variants, and 2017 brought a Gelato Messina crossover with flavours like black forest and coconut lychee. In 2024, Arnott's even released a Tim Tam flavoured like a Jatz cracker, which is either an act of culinary bravery or a biscuit company running out of new ideas, depending on who you ask at the office kitchen.

Sixty-odd years on from a mildly disappointing British biscuit, the Tim Tam has become something closer to a national instrument, one that is deliberately engineered to be eaten in a hurry while slightly melting in your hand. It remains the only snack food in the country with its own unofficial technique tutorial passed down at every workplace morning tea, and frankly, Australia would not have it any other way.

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