Nigella Lawson looked sophisticated as she stepped out for dinner in London on Monday with a mystery male companion.

The award-winning TV cook, 64, bundled up in a black blazer and a high-neck top, teamed with trousers and heeled ankle boots. 

Meanwhile, her male companion dressed to impress in a long black coat and grey trousers. 

Nigella, who is currently single, was married to journalist John Diamond, before he tragically died of throat cancer aged just 47.

Three years after John pᴀssed away, Nigella married wealthy art collector and advertising agency founder, Charles Saatchi, in 2003. But their marriage broke down after 10 years.

Nigella Lawson looked sophisticated as she stepped out for dinner in London on Monday with a mystery male companion

The award-winning TV cook, 64, bundled up in a black blazer and a high-neck top, teamed with trousers and heeled ankle boots

It was revealed last week that Nigella has signed up to be the face of Greggs bakery this Christmas.

However, while she has agreed to film an advert with the brand, the star reportedly won’t be endorsing the brand’s famous sausage rolls.

The Sun has revealed the TV chef, 64, will be putting her name to the high-street bakery chain’s festive flatbread and Christmas lunch baguette, but not the delightful flaky pastry.

A source told the publication: ‘[Nigella] wasn’t keen on putting her face to their sausage rolls though, and agreed to take part just to push their festive fare.

‘As well as their Christmas lunch baguette and their festive flatbread, Nigella is highlighting a special chocolate doughnut.

‘Despite the sausage roll snub, Greggs couldn’t be happier to have such a haute cuisine heavyweight on board.’

MailOnline have contacted Nigella’s representatives for comment.

Meanwhile, her male companion dressed to impress in a long black coat and grey trousers

Her first husband, journalist John Diamond (left), was diagnosed with throat cancer in 1997 and died in March 2001 (pictured in 2000)

Three years after John pᴀssed away, Nigella married wealthy art collector and advertising agency founder, Charles Saatchi , in 2003. But their marriage broke down after 10 years

Meanwhile last week Nigella was seen leaving a smart West London house clutching a bag of Greggs goodies as she filmed the festive advert in leafy Ealing.

It may be an unlikely pairing, but the star will receive a rumoured six-figure sum to lend her unique brand of suggestive sparkle to the company’s seasonal menu.

For the adverts, Nigella was wrapped up in a dark wool coat with a sprinkling of snow on her shoulders on the doorstep of the suburban house festooned with fairy lights.

Laid out on a table on set were a selection of Greggs’ seasonal H๏τ drinks – which include orange H๏τ chocolate and salted caramel latte – as well as chicken, sage and onion festive bakes, and Christmas lunch baguettes.

The chain’s festive menu is usually much-anticipated. Its mince pies are already in store, but it has not yet announced when the seasonal bakes will be on sale.

And this year they may sell like H๏τcakes as Nigella has an impeccable reputation for boosting sales.

Nigella has signed up for a Greggs Christmas advert – but the Domestic Goddess reportedly WON’T endorse their famous sausage rolls

In 2006, when she recommended goose fat as essential for the perfect roast potato, sales doubled at Waitrose and Tesco. And after using prunes in a recipe on Nigella’s Christmas Kitchen, Waitrose said sales of the dried fruit rose by 30 per cent.

Nigella and Greggs may have more in common than first meets the eye, as enjoy both unrivalled culinary success. Earlier this year, Greggs topped a poll for being the most popular fast-food chain in the UK, with its legendary sausage roll leading the pack.

Nigella also has a popular sausage roll recipe, which includes chestnuts, nutmeg and dried sage.

With 11 cookery bestsellers since her first hit, How To Eat, was published in 1998, she also has several successful TV shows to her name, including Nigella’s Christmas Kitchen.

Her pronouncements on food and domestic drudgery always draw attention – she never irons, she has admitted, prefers chocolate cake to Christmas cake, and once faced ridicule for (deliberately) mispronouncing microwave as ‘meecrowahvay’.

Most recently, she divided the nation when she revealed that she loved eating anything in bed which could be consumed with fingers or a spoon.

Whether that will extend to Greggs sausage rolls this Christmas is anyone’s guess.