Liam Payne took a cake decorating class with his girlfriend.

The One Direction hunk and Sophia Smith paid a visit to Carlo's Bakery in New Jersey on Wednesday (06.08.14) and tried their hands at icing some sweet treats after admitting to being a ''huge fan'' of 'Cake Boss', the reality TV show about the bakery.

Carlo's employee Adam told E! News: ''It was totally unknown. He tweeted at Buddy [Valastro, owner], and then he called the bakery [about coming in].

''They were just there to have fun. Totally spur of the moment. They didn't get to meet Buddy, Buddy is overseas, but they met his sisters.''

And as well as undertaking a private decorating class - in which he decorated a blue fondant cake with white icing while Sofia worked on a pink and purple tie dye dessert - Liam was happy to jump behind the counter and serve customers.

Adam added: ''He put on a Carlo's Bakery shirt, and he came behind the counter and helped out some customers.

''He even took photos with fans and signed some autographs.

''We had a lot of fun. The bakery loved having him.''

And following the sugary session, Liam has now changed his twitter name to 'Liam Payne the baker'.

His profile description now reads: ''I am a baker, i like to bake (sic)''.

He also thanked Carlo's for the fun day out.

He wrote: ''thanks so much for having us today was so much fun and thanks for all the goodies (sic)''