She then embarked upon a career as a freelance journalist, writing for a number of newspapers and magazines. In 1998, she brought out her first cook book, How to Eat, which sold 300,000 copies and became a best-seller. She wrote her second book in 2000, How to be a Domestic Goddess, which won her the British Book Award for Author of the Year.
In 1999, she hosted her own cooking show series, Nigella Bites, accompanied by another best-selling cook book. Nigella Bites won Lawson a Guild of Food Writers Award; her 2005 ITV daytime chat show Nigella was met with a negative critical reaction and was cancelled after attracting low ratings
On 27 November 2013, a trial of her two personal assistants, Italian-born sisters Elisabetta and Francesca Grillo began. The Grillos were accused of fraudulently using the credit cards of Charles Saatchi, Nigella’s ex husband’s, private company. During court proceedings in early December, the sisters claimed that Lawson had allowed their use of the credit cards in exchange for their silence regarding her drug use. Questions regarding Lawson's drug use were allowed by the judge as part of the sisters' "bad character" defence. Nigella admitted to taking cocaine and cannabis but denied she had been addicted, stating that she found it made an intolerable situation tolerable.
On 20 December 2013, the two sisters were found not guilty . The metropolitan police confirmed that Nigella would not be the subject of an investigation based on claims made in court that she consumed cocaine; however, the decision will be reviewed if new evidence comes to light. It has been alleged that Charles Saatchi