The 12-month campaign will mean that 15p from each sale of its new cheesecake mix will be donated to the charity.
The company will also be running a variety of sporting challenges and events throughout the course of the year to raise funds.
Maurice van Tongeren, executive director of Ireks UK, added: “We are delighted to be supporting the fantastic work carried out by Macmillan Cancer Support to help those facing the awful realities of the disease. We hope that, through this activity, bakeries across the UK can engage with their customers to drive interest and sales in these new delicious cheesecakes while also helping raise as much money as possible for this extremely worthy cause.”
More details can be found on ireks.co.uk.