
The promotion, which has been created by The Big Kick, runs on packs of Cadbury Digestives, Rich Tea, Shortcake and Oat & Choc Chip. It launches on September 28 and runs for the next 12 weeks.
Consumers will be able to enter the promotion by using a unique on-pack code online to upload their preferred picture via Snapfish. The picture will be printed on the mug, worth £7.99, and sent to them.
The aim of the campaign is to extend the brands’ alignment with hot drinks as autumn approaches.
Lisa Lewis, Senior Brand Manager for Cadbury Biscuits at Burton’s Foods, said: "We want to reflect the affection consumers feel for the brand and the chocolate pleasure Cadbury brings to the tea and biscuits occasion by offering consumers a very special way to personalise their tea break.
"We know that in the home 90% of biscuit consumption features a drink which makes this an ideal offering for the Cadbury Biscuits lover."
The promotion follows last year’s TV campaign for Cadbury Digestives showing people using a variety of methods to melt chunks of chocolate over plain digestives.