McVitie’s has launched its Big One Jaffa Cake in stores.

Costing £7, the “epic” Jaffa Cake is available from Morrisons and Asda now, with Tesco due to stock it later in the year.

Tom Blair, brand manager at McVitie’s, said: “We have been experimenting and tweaking the Big One recipe for a number of years now. We needed to ensure the sensation of eating the larger Jaffa Cake is similar to the smaller Jaffa Cake so all of our more hardcore fans will enjoy it as much as new Jaffa fans.

“This innovative product will give a fantastic boost to the celebration cakes category and will attract new customers to Jaffa Cakes.”

Figures from Nielsen show the Jaffa Cakes brand in the UK is worth £52m and is bought by 15 million households.