Nosrat started working on it around 2009–10 when
Michael Pollan, an author and cooking student of hers, learned about her four-part system and encouraged her to write a book about it. She developed a curriculum based on the concept and taught many classes on it to develop the material. Throughout the process, Nosrat noted which concepts were easier to convey visually and started to design diagrams to help explain them. These also formed the foundation of diagrams in the book which give an overview, for example of sources of acid or salt. Overall, Nosrat worked on it for 7 years. The content was developed over time through her teaching, then the proposal took four years to prepare: three to write it, then Nosrat worked for another year with MacNaughton on the illustrations. She wanted the proposal to be illustrated because the approach was different enough from the standard cookbook that she felt it was needed to convince publishers. The finished proposal went to auction, was sold in 2013 and then published four years later in 2017. == Reception ==