She’s just as well known for her flawless, porcelain complexion as she is for whipping up culinary masterpieces in the kitchen.

And now Nigella Lawson has revealed the secret to her wrinkle-free skin at 64 – sleeping in a cold room with absolutely no central heating on.

The domestic goddess has an ‘immutable nighttime regime’, which involves a cleansing and skincare routine followed by a very chilly night’s sleep.

When asked the secrets to her ageless appearance by one of her followers on X, she revealed that every night she washes her face with a muslin and Temple Spa’s In the Beginning cleanser.

She said she then massages in Prickly Pear Seed Oil by skincare brand Victora Health, adding: ‘And no central heating in the bedroom!’

Nigella Lawson has revealed the secret to her wrinkle-free skin at 64 – sleeping in a cold room with absolutely no central heating on

She revealed that every night she washes her face with a muslin and Temple Spa’s In the beginning cleanser (pictured in 2004)

While it might be tempting to put on the central heating overnight during the colder months, dermatologists have warned that it could lead to severely dry skin.

Leading skincare experts have said one of the biggest causes of dry and flaky skin in the winter months is coming into contact with air, indoors and outdoors, that lacks humidity.

‘Central heating adds an extra level of stress to managing dry skin, which is especially problematic when you have a pre-existing skin disease such as psoriasis or eczema,’ Dr Adam Friedmann told Glamour magazine.

According to consultant dermatologist Dr Derrick Phillips, ‘Use of central heating over the winter months reduces indoor humidity by drying out the air as the temperature rises.’

He added: ‘This has a drying effect on the skin as it encourages loss moisture from the surface, leading to irritation and flare-ups of conditions like eczema, where the skin barrier is impaired.’

The use of humidifiers has grown in popularity as they add moisture to the air during the winter months and reduce skin and respiratory problems.

Stars including Celine Dion, Mariah Carey and Kendall Jenner all use a humidifier at night as part of their beauty and health regimes.

Ms Lawson, who split from second husband Charles Saatchi in 2013, recently slammed the use of controversial weight loss drug Ozempic.

The domestic goddess has an ‘immutable nighttime regime’, which involves a cleansing and skincare routine followed by a very chilly night’s sleep

She said she has spent her whole life ‘trying to help people not to feel food is the enemy’ and is someone who ‘would prefer to think about what I add to my diet than what I remove.’

She told The Times: ‘I read something once where someone said, ‘I was on Ozempic and it was the first time I didn’t think about food all the time.

‘I thought, ‘I can’t imagine anything worse than that. I take great pleasure in thinking about food all of the time.’