Bradley Cooper claimed that the actors performed their food prep scenes with all the hazards of a real kitchen, including flaming stoves and sharp knives. Also, real chefs were cast as extras in the kitchen, putting pressure on the actors to keep up.
Jamie Dornan had a 2-minute cameo in the movie that didn't make it to the final cut, it was part of Sienna Miller's character's backstory, he played her ex-husband Leon Sweeney and appeared in one scene having a fight with her. The scene was disapproved by the audience in test screenings and removed from the movie.
Top British chef Clare Smyth was bowled over by Bradley Cooper's eagerness to absorb everything she did during her time with him in rehearsals. He was endlessly inquisitive about how she actually handled various culinary utensils such tongs, spoons and knives.
Was going to be titled "Chef", but Jon Favreau had already used the title for his film. Before the Weinstein Company bought the rights for "Adam Jones", it was a Sony Pictures project and the company served Favreau's production with a cease-and-desist over the title "Chef", Sony cleared the titles "Chef" and "The Chef" with the MPAA and requested Aldamisa (which controlled Favreau's film) to change the title of their film on threat of legal action. Favreau's film ended up with the title "Chef" and was released in 2014, while Sony/The Weinstein Company's "Chef" changed its title to "Adam Jones" in 2014. In July 2015, it was retitled "Burnt" and was released in October 2015.
Alicia Vikander's part didn't exist on the script. During the showreel of The Weinstein Company's upcoming slate of films at the 2015 Cannes Film Festival, producer Harvey Weinstein told journalists that he was so enamored of Vikander that he asked her to play a part in "Burnt". Weinstein also stated that Vikander will have a brilliant future in Hollywood's biggest league. Vikander had previously starred in another upcoming Weinstein Company film, Tulip Fever (2017).