Will Samantha Cameron win over Mary Berry on The Great Sport Relief Bake Off?

Samantha Cameron will be turning her charms on Mary Berry and Paul Hollywood on Wednesday evening, when the episode featuring her in The Great Sport Relief Bake Off is aired on TV.

The Prime Minister's wife admits she doesn't bake and has never made a canapé, so it's little wonder she was terrified at the prospect of baking before the nation.

Her desire to support the charity edition of Bake Off was greater than her nerves, however. She said: "I wanted to support the amazing work that Sport Relief does and to encourage others to get involved. I am excited – and slightly terrified – to be taking part."

She also told Radio Times what her big fear for the show was: "I'm scared that we will have to bake something that I haven't even heard of and I won't have a clue what it's meant to look like!"

When asked where she got her inspiration for her bakes, she revealed it was Cornwall, where she and husband David Cameron holiday with their children.

"I was inspired by our family holidays in Cornwall. We go every year and love the fresh air, food and surfing. I practised a little bit as I had certainly never made a canapé!" she said.

The 44-year-old, who is an ambassador for Save the Children and has contributed to various charity organisations including Dress For Success and Vitalise, will be whisking, frosting and drizzling against former England international and Premiership appearance record holder for a goalkeeper, David James, EastEnders actress Maddy Hill, and Salford stand-up comedian, presenter and actor Jason Manford.

The quartet's first task will be to make a batch of perfect canapés using puff pastry, before preparing a Paris-Brest – a delicious French dessert involving choux pastry and praline-flavoured cream.

A 3D cake in the shape of a sporting trophy will make up the challenging showstopper round.

All goods will, of course, be sampled by duo judging team Mary and Paul. Bake Off presenter Mel Giedroyc will also be on hand – without her sidekick Sue – while Clare Balding will keep viewers informed on where Sport Relief funds go.

The Great Sport Relief Bake Off airs on Wednesday 27 January at 8.30pm, on BBC One.