She is a regular critic on the BBC's MasterChef and has appeared on Channel 4's television series Very British Problems.

Dent has written 11 novels for teenagers,[1] and her first non-fiction title How to Leave Twitter was published in July 2011.

She attended Bishop Goodwin Primary School in Currock, Carlisle, and studied English Literature at the University of Stirling.

After graduation from Stirling University, Dent's first job was editorial assistant for Marie Claire magazine in London.

She wrote "World of Lather", celebrating her love of Coronation Street and other soap operas, for the Guardian's Guide supplement from 2001 to 2010.

In December 2008, Dent signed a two-book deal with Hodder; Diary of a Snob was launched at Hay-on-Wye Literary Festival in June 2009.

[12] Published in 2023, in Comfort Eating Grace reveals why we hold these secret snacks and naughty nibbles so dear to our hearts.

[citation needed] Grace joined Ainsley Harriott for a five-part series on Channel 4 called Best of Britain by the Sea in 2022.

[15] On 18 December 2024, it was announced she would be replacing Gregg Wallace as a judge on Celebrity Masterchef alongside John Torode in 2025.