The poster, created by JWT London, is made from 13,360 individual Mr Kipling cakes and is situated at Westfield London in Shepherd’s Bush. From 11am today, passersby have been able to eat the cakes.
Lisa-Jo Harvey, a senior brand manager at Premier Foods, said "We can’t think of a better way to show people that life is better with cake than to create an edible poster made out of thousands of our exceedingly good cakes."
The wider campaign was created alongside the Saatchi & Saatchi digital agency Outside Line, the media agency Carat and the PR agency Cirkle.
David Masterman, a creative director at JWT London, said: "If Mr Kipling himself was doing a poster, he'd make it out of cake."