The regional city of Horsham, in Western Victoria, may soon go down in the history books as being home to the world’s biggest vanilla slice.

The Horsham Agricultural Society, together with The Oven Door Bakery, is preparing for a Guinness World Record attempt at this year’s 136th Grand Annual Agricultural Show.

The assembly will begin at 10am on October 1, in the Lifestyle Pavilion, where showgoers can watch the event as it unfolds.

The Oven Door Bakery owner and baker James Henwood said he expects the slice will take about 10 hours to put together and at least 600kg of custard, 12kg of pastry and bucket-loads of fondant to complete.

“We have to meet the criteria set out by the Guinness World Records, which has very strict policies and procedures,” he said.

“We’ll have regular sized vanilla slices available for sale during the day and also offer an opportunity for patrons to buy a piece of the world’s biggest Vanilla Slice.

“The current title-holder of the world’s biggest vanilla slice is owned by a fish and chip shop in Frankston in Melbourne. It’s time the title is returned to a bakery,” James said.

The Horsham Show event manager Andrea Cross said it will be a unique attraction that promises to bring crowds to the agricultural show. 

“It will be a fantastic opportunity for cake lovers and cake bakers to come and be part of a world record-breaking experience. We have no doubt it will provide a much needed boost to the Horsham Show after last year’s event was washed out by bad weather,” she said.

“This is a classic example of demonstrating community engagement in a rural town with a local business seeking a way to support an annual event that has been running for 136 years.”