The Double Big Mac has four 100% beef patties, a slice of cheese, lettuce, onion and pickles, and the unbeatable Big Mac sauce. It's everything you love – and more! And a spokesman said: “Christmas has come early with the Double Big Mac. It's everything you love – and more.” Other festive treats include the Jerk Chicken Sandwich – two pieces of succulent crispy chicken with a spicy jerk sauce, Beechwood smoked bacon, Pepper Jack cheese, onion and lettuce in a sourdough bun. Meanwhile, the Celebrations McFlurry lets you indulge like never before. Soft dairy ice cream, swirled with Maltesers clusters, Galaxy chocolate drops, Caramel pieces, Mars Nuggets and Twix biscuits, topped with a milk chocolate sauce All will be available until December 29 after 11am at participating restaurants only. Subject to availability.