Union leaders have met management of biscuit firm Burton's Foods to discuss up to 660 proposed job losses at its Moreton site in Wirral.
The firm bakes some of the UK's best-known biscuit brands
A Unite union spokesman said it had asked for more details about the business case for the job cuts.
The union hopes that at the next joint meeting on 21 May, an alternative to the redundancies can be found.
A spokeswoman for Burton's said that "discussions were at a very early stage" and there was no comment.
Franny Joyce, regional industrial organiser for Unite, said it would aim to reverse the decision if there was any such possibility.
The plant will continue to manufacture other products. It is proposed that 300 jobs will remain at Moreton.
The decision came after a five-month review of all the company's facilities, including plants at Blackpool, Edinburgh, Moreton and Llantarnam in south Wales.
Burton's Foods, which was bought by a private equity firm earlier this year, makes Wagon Wheels, Jammie Dodgers and Maryland Cookies, as well as a range of Cadbury's chocolate biscuits under licence.