London, Dec 23 : Cadbury bosses have revealed that they make a chocolate bar especially for The Queen at Christmas.

While the chocolate makers have kept the recipe a secret, it is believed that they create a dark chocolate bar with a high percentage of cocoa solids for the Royals.

Cadbury makes three of four batches a year and just before Christmas sends a series of bars to Buckingham Palace, Windsor Castle and Sandringham, according to The Daily Mail.

The chocolate is wrapped in gold foil with a red wrapper bearing the royal crest and `By Appointment to HM The Queen'.

Beneath the crest, the words `Cadbury''s Superior Culinary Plain Chocolate' are written.

"We do make the Queen a bar of dark chocolate. It''s not for sale to the public," the Telegraph quoted Tony Bilsborough, a spokesman for Cadbury, as saying.

"We make this for her under the terms of the royal mark.

"We''ve been providing chocolate to the Royal Family since Victorian times but I cannot discuss the recipe," he added.

Called the `Royal Household chocolate' by staff at Cadbury, it is believe to be suitable for cooking as well as eating on its own. (ANI)