The display took a team of food artists more than 200 hours to complete, and was devised by The Halo Group. Its walls are made of 1,250 bars of the brand's Dairy Milk Winter Edition product, meanwhile 6,150 Cadbury Roses have been combined to create a brightly coloured rug on the floor of the grotto.
Crunchie and Double Decker bars designed to represent coals and ashes have been used to represent a chocolate fireplace, and chocolate Christmas trees are complete with edible baubles and presents.
The space also features a Santa’s table and chair made from the brand’s Wispa product, and a giant Freddo head painting hangs from one of the walls.
Another 23 trucks are set to visit secret locations throughout the UK as part of the brand’s real-life advent calendar campaign. Each truck represents a different 'door' of the advent calendar, and the Cadbury Chocolate Grotto is just the first of many Christmas surprises.
Claire Low, marketing manager at Mondelèz International, said: "Santa’s Grotto is synonymous with the feeling of Christmas so we felt this was the perfect way to kick off our festive countdown.
"We wanted to create something that captured the excitement felt when opening the first door of your advent calendar, and the Cadbury Chocolate Grotto merges the wonderful themes of Santa and chocolate. We loved seeing everyone enjoy the one-of-a kind creation and can’t wait to unleash even more joy when we open our next door tomorrow."