The Duke and Duchess of Cambridge have tried their hand at making a tasty treat popular in Germany - pretzels.
William and Kate were given the culinary lesson when they visited the picturesque city of Heidelberg to celebrate the local culture, food and people.
They rolled the pastry into long sausage shapes and were then shown how to flick and cross them over in one movement to create the snack's classic knot shape.
Local baker Andreas Gobes, part of a guild whose members put on the pastry display, said: "Catherine was a little bit more talented than William but they both did a great job.
"This type of pretzel is a speciality for the region so we wanted to show them that.
"In this region it has a special shape - thin arms and a thick body - with salt and it's red- brown colour."
The cookery lesson was held in the city's historic marktplatz where stalls celebrating local produce from beer to sweets was on display.
Kate, who wore a yellow Jenny Packham dress, stopped to chat to some of the residents enjoying the produce, while nearby hundreds lined the square behind barriers.
Earlier the couple had donned white coats for a visit to a top cancer research centre in the city.
William and Kate were shown the world acclaimed work being carried out at the German Cancer Research Centre, where hundreds of locals had turned out to greet the royal couple on the second day of their tour of Germany.
Kate was the star attraction outside with local Germans shouting her name and waving Union flags when she arrived.
Inside British stem cell biologist Dr Michael Milsom, 42, originally from Chesterfield, showed the couple around one of the laboratories.
He said: "It's really helpful to have a visit from the Duke and Duchess as they publicise the importance of work we do here.
"The UK and Germany are leaders in this field of stem cell research," said the expert who has been based in Heidelberg for seven years.
He told William and Kate about the latest developments in stem cell research.
The Leeds University graduate told them how his team focuses on the question of whether and how an accumulation of DNA damage in stem cells is the cause for ageing of an organ system.
Such damage may cause exhaustion of the stem cell pool and loss of the organ's capacity to regenerate. The work is particularly important in research into leukaemia.
William said "ladies first" when he was asked to look at the cells through a microscope.
Afterwards Kate said: "It's in 3D too which is amazing."
William, who also looked through the microscope, asked how far down the line his stem cell research was and added: "It's fascinating work!"