Kraft Foods has signalled the first new round of job losses at Cadbury following its takeover of the Dairy Milk maker.
The US food group said redundancies were likely at Cadbury's HQ in Uxbridge, west London, and at Bourneville in Birmingham.
Up to 150 jobs could go in the planned cuts - Kraft's first move to integrate Cadbury into its operations since January's controversial deal.
A Cadbury spokesman confirmed that the cuts were "a result of the Kraft acquisition".
He told the BBC: "It could be up to 150 [jobs lost]. It could be less, as Kraft has said it wants to identify opportunities to retain skilled Cadbury people."
Last month Kraft went back on a pledge to keep open Cadbury's Somerdale factory near Bristol, a move that will result in the loss of around 400 jobs.
Kraft opens ‘new chapter’ with Q4 profits surge (16 February 2010)
Coughlan to pressure Kraft over job fears (13 February 2010)
Kraft goes back on pledge to keep Cadbury Somerdale open (9 February 2010)
Will Kraft be able to stop the brain drain at Cadbury? (6 February 2010)