All-British chocolate bar made by scientists using Reading-grown cocoa

Maha Khan, the University of Reading food security master’s student who created the chocolate bar. Photograph: University of Reading

The late queen was the only person in history to have ever eaten a chocolate bar made with 100% British ingredients, after she was given one as a six-year-old in 1932 by the confectioner Rowntree’s.

The bar was created from a glasshouse-grown cocoa plant, at Rowntree’s headquarters in York.