Queen Elizabeth won't travel without a slice of chocolate biscuit cake in tow.
The 90-year-old monarch is addicted to her chef Darren McGrady's delicious sweet treat and makes sure a little stash of it goes with her whenever she's away from home.
Speaking to RecipesPlus, he said: "Now the chocolate biscuit cake is the only cake that goes back again and again and again everyday until it's all gone. "She'll take a small slice every day until eventually there is only one tiny piece, but you have to send that up, she wants to finish the whole of that cake."
The queen's sweet tooth is certainly no secret as Darren previously revealed that she turns into a "major chocoholic" when the festive season rolls around.
He said at the time: "The queen is a major chocoholic, particularly dark chocolate, so she always has a chocolate treat on Christmas. She also loves mint."
He also revealed that Christmas is the one time of the year when the monarch turns the tables on her staff.
He explained: "Right before the Christmas buffet, the senior chef on duty goes into the dining room and carves the rib roast or turkey or ham and once he's done, Her Majesty presents the chef with a glass of whiskey and they toast. That's the only time the chef goes into the dining room and has a glass of whiskey with the royal family. It's one of the chef's favourite traditions."