Cole will leave the top comms position next week after heading the corporate affairs department since 2007. She does not have another job lined up but is looking for a similar role in other organisations.
It is understood that Cole was offered a number of positions within the newly merged company but turned them down.
Speaking to PRWeek, Cole said of her departure: ‘After nearly a decade at Cadbury in both operational and corporate affairs roles, I've decided it's time for a new adventure. I've loved every minute but the past year has been an absolute high point, kicking off with the launch of Fairtrade Cadbury products and ending in the bittersweet bid battle.'
She added: ‘While I'm naturally sad to see the end of Cadbury as an independent player, I'm proud to have played my part in generating an additional $2.4bn of shareholder value.'
Cadbury agreed a takeover bid by Kraft in January after the US food giant substantially increased its bid for the confectionery firm.
Cadbury's board accepted a new bid of £11.5bn ($18.9bn) after months of speculation over whether the deal would be approved.
Cadbury and its agency Finsbury had fought a campaign to preserve its independence and managed to raise the price paid per share from 761p to 840p. Cadbury had initially insisted it was committed to remaining independent and the public got behind the campaign with Facebook groups being set up that were against the takeover bid.