The tailored JCDecaux outdoor sites can distribute up to 500 Mr Kipling Angel Slices every day.
At the touch of a button, the vinyl-wrapped posters will also emit the cake's aroma to try and lure in consumers.
The move marks a change in advertising tack from Mr Kipling, as it undertakes more experiential advertising.
The scented outdoor sites form part of a wider campaign headed up by 'Gavin & Stacey' star, Joanna Page.
Page will front the campaign through PR, including switching on the first cake dispenser on London's Tottenham Court Road.
The experiential campaign will also involved a tailored "Cakemobile", which will tour the country from 27 March until 9 May.
The van will promote the brand's snap-pack format and the fact that consumers can eat its products on the go.
The creative agency behind the push is 101. Starcom bought the media space.
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