Wholegreen Bakery baked the insult: an edible Cardboard Cake that sold out its myth

Wholegreen Bakery is a Sydney gluten-free bakery founded in 2014 by Cherie Lyden after she and her daughter were diagnosed with coeliac disease. Her standing complaint: 'If I had a dollar for every time I've heard people say that gluten free food tastes like cardboard, I'd be a rich lady.'

In March 2024, with independent agency The Hallway, the bakery launched the world's first edible Cardboard Cake — 'let them eat cardboard'. It looks like a corrugated sheet of boxboard: The Hallway ran a design process that produced a bespoke baking tray mimicking cardboard grooves, so the gag could actually be mass-produced in the bakery rather than hand-made for a photo.

The cake is Coeliac-Australia-accredited and built from butterscotch, coffee, cocoa powder, pastry, caramel and brown rice flour — flavour profiling meant the mock packaging tasted better than the sceptics' claim allows. It sold across the bakery's three stores in a limited release until 17 March 2024, with a short film on the making.

In 2025 the work entered the D&AD Awards archive with three shortlists — Health & Wellbeing/Direct, Product Design/Promotional, and Direct/Direct Mail — no pencil, three jury nods: a small bakery out-arguing a global food myth.

Bake the insult: make the cardboard real and edible

The dumb alternative was another 'gluten-free can be delicious' campaign with beauty shots of real cakes — the exact genre sceptics scroll past.

Owning the insult removes its power: a cake that is literally cardboard in appearance forces the doubter's own words into the product name.

The custom tray is where the clever lives — it converts a one-off photo stunt into a repeatable bakery product, so the joke survives contact with production.

Coeliac Australia accreditation makes the stunt verifiable: the punchline doubles as certification evidence for the whole range.

When a category has a universal insult, the strongest reply is not a rebuttal ad but manufacturing the insult yourself — if the mock object turns out delicious, the demonstration argues for you.

The five-day limited run put the bakery's argument in front of a national audience, and in 2025 D&AD shortlisted the work in three separate categories — Health & Wellbeing/Direct, Product Design/Promotional and Direct/Direct Mail — against far larger entrants. The D&AD entry itself carried the wider problem on record: over 380,000 Australians live with coeliac disease, many undiagnosed, and the cardboard myth shapes how seriously the condition is taken.