Rachel Khoo (born 28 August 1980) is a British cook, author, and broadcaster who has hosted and co-hosted television cooking shows on the BBC, Food Network, and Netflix. In 2012, she received international acclaim for her cookbook and its accompanying BBC cookery series, The Little Paris Kitchen: Cooking with Rachel Khoo.

Khoo was born in Croydon, South London. She has a younger brother named Michael and attended primary school in Bromley. Her paternal family were Chinese immigrants to Malaysia and were part of the Khoo Kongsi clanhouse in George Town, Penang. Her father is Malaysian Chinese and immigrated to the UK from Ipoh, Perak, at age 16 in 1968. He later met and married her mother, an Austrian native. When Khoo was 12, her father's job in IT took the family to Bavaria, where they lived in the countryside outside Munich for four years. They returned to the UK when she was 16 and settled outside of London. She attended Central Saint Martins College of Art and Design in London, and earned a degree in art and design.

After graduating from university, Khoo worked in public relations for the shirt-maker Thomas Pink for two years. Looking for "adventure" in her life and with no knowledge of French, she quit her job and took a three-month patisserie course at Le Cordon Bleu in Paris in 2006. While living in Paris, she worked part-time as an au pair and sold perfume at Printemps, an upscale department store. After graduating from Le Cordon Bleu, she worked at La Cocotte, a Parisian cookbook store and café, where she ran baking workshops and served as the store's pastry chef.

In 2010, Khoo received her first publishing deal for two French-language cookery books: Barres à céreales, muesli et granola maison and Pâtes à tartiner, published by Marabout. Both were later translated into English, as Rachel Khoo's Muesli and Granola and Rachel Khoo's Sweet and Savory Pâtés. During this time, she also worked briefly in Germany as a freelancer for Volkswagen, where she ran food-related events.

After successfully pitching UK publishers her concept for a new cookbook, Khoo opened a small restaurant to test recipes for her first English-language cookbook, The Little Paris Kitchen. She prepared and served food from her Paris flat in the Belleville neighbourhood, accommodating just two diners at a time. Using social media to advertise the restaurant, she quickly attracted a large fan base. Later, the BBC commissioned The Little Paris Kitchen: Cooking with Rachel Khoo, her first TV series. Her restaurant closed before production began on the series. The six-episode series was filmed in Khoo's Paris kitchen and around the city. It began airing on British TV on 19 March 2012. Eventually, the series was aired in international markets. The book The Little Paris Kitchen was released in 2012. It has been translated into several languages. The book became a bestseller, selling more than 120,000 copies. Each edition of the television series was watched by over 1.5 million viewers in the UK.

Khoo released her second English-language cookbook, My Little French Kitchen, chronicling her travels across France, in September 2013, published by Michael Joseph. My Little French Kitchen sold upwards of 1,000 copies a week. In 2014, she completed filming two new cooking series for BBC Worldwide: Rachel Khoo’s Kitchen Notebook: London and Rachel Khoo's Kitchen Notebook: Cosmopolitan Cook. Both series aired in the UK and internationally. In Rachel Khoo's Kitchen Notebook: Cosmopolitan Cook, she visited various European and Eurasian cities, including Stockholm and Istanbul, and cooked dishes inspired by her travels. Her cookbook, Rachel Khoo’s Kitchen Notebook, was released in the UK on 12 February 2015. In November 2014, she travelled to Malaysia to film an episode of the series A Cook Abroad.^{[citation needed]}

On 9 March 2015, BBC television aired A Cook Abroad: Rachel Khoo's Malaysia, where she visited the home of her father's extended family and explored the cuisine of the country. Khoo's fourth television series, Rachel Khoo's Kitchen Notebook: Melbourne, premiered in Australia on 23 July 2015 on the network SBS. In February 2016, she was announced as a new judge on the Australian TV cooking competition My Kitchen Rules, for the series' 7th season. Khoo filmed the programme in 2015 while travelling throughout Australia. The new season began airing on Seven Network beginning on 1 February 2016. Khoo appears in 6 episodes of the program.

Khoo launched Khoollect, a lifestyle-, fashion- and food-oriented online blog in February 2016. The blog is defunct as of 2020.