Food for the film was created by master of nouvelle cuisine, prominent premiere French chef Paul Bocuse.

The original novel revealed the murderer at the very beginning; the film opted to reveal it at the end. In addition, the film's killer in the film was not the same one as the novel.

Changes from the film's source novel included the ending and the removal of a lot of the book's erotic material.

In 2006, Warner Bros. announced that the film would be remade; as of 2018, this film has not happened.

Playing a pompous gourmet in this film was Robert Morley who due to the popularity of the character went onto make a series of successful television commercials for Heinz soup. Morley was awarded Best Supporting Actor from both the National Society of Film Critics Awards (1979) and the Los Angeles Film Critics Association Awards (1978). Morely was also nominated in the same category at the Golden Globes.

The film was made and released about two years after its source novel "Someone Is Killing the Great Chefs of Europe" by Nan Lyons and Ivan Lyons was first published in 1976. The film's source novelists later wrote another similarly titled book, "Someone Is Killing the Great Chefs of America".

The movie's source novel actually gave the recipes for each dish.

The kitchen in Buckingham Palace was filmed at the New Lido restaurant in Paris.

Food critic Maximillian Vandeveer (Robert Morley) was responsible for writing an article in which Vandeveer theorizes "the world's most fabulous meal".

$180,000 of the film's budget was spent on the food. The fish market scene in Venice used roughly $3,000 worth of food.

One of four collaborations of actor George Segal and director Ted Kotcheff. When this film was made, the two had recently worked on Fun with Dick and Jane (1977) just the year before. The two also collaborated in television, namely on The Desperate Hours (1967) and Of Mice and Men (1968),

According to Time Out, "Robert Aldrich was at one time interested in directing".

The picture was originally distributed by Warner Brothers but was produced by Lorimar. As such, the film was available on home video during the 1980s in territories which weren't Warner Bros. When Lorimar was bought by Warner Communications in 1989, they got the film back.

Milos Forman was at one point slated to direct this film.

Final theatrical feature film (uncredited) of actor Ronald Leigh-Hunt.

The movie was notable for having a distinguishable European cast of French and Italian actors. The top billed lead was an American (George Segal) with Robert Morley and Jacqueline Bisset both being English. At the time, French actor Philippe Noiret had recently appeared in another French food film farce, "Blow Out" [La Grande Bouffe (1973)].

The producers were hoping that this would be a comeback vehicle for Brigitte Bardot.

One of few food films which are black comedies. Others include The Last Supper (1995), Marco Ferreri's La Grande Bouffe (1973) [Blow Out] and Peter Greenaway's The Cook, the Thief, His Wife & Her Lover (1989).

Half of the film's budget came from a German tax shelter.

A line of dialogue in the film was "Too Many Cooks". The film's UK title was something like this. It was "Too Many Chefs" but wasn't called by the more common English expression which is "Too Many Cooks".

The movie's producer William Aldrich billed the picture as "The Delicious Mystery" of 1979.

French actors appearing the movie included Jean Gaven, Jean Parédès, Philippe Noiret, Jacques Marin, Jean Rochefort, Daniel Emilfork, Jacques Balutin, and Jean-Pierre Cassel.

Debut theatrical feature film as a full producer of William Aldrich who previously had acted only in an associate producer capacity.

Who Is Killing the Great Chefs of Europe? (1978) shot in four European countries: France, Italy, England and the former West Germany.

Robert Morley played five years earlier in Theater Of Blood, a film with a very similar topic to this one, where he also played a gourmet.

Italian actors appearing in the picture included Gigi Proietti and Stefano Satta Flores.

The film's working title, like its source novel, "Someone Is Killing the Great Chefs of Europe," but was ultimately retitled to avoid confusion with Somebody Killed Her Husband (1978).

Nigel Havers: As a Counterman.

The gastronomic gruesome "grand guignol" gourmet murders are as follows: (1) Baked in an oven (2) Drowned in a lobster aquarium (3) Frozen in a meat fridge (4) Skull crushed in a duck press and the intended but unsuccessful (5) Blown-up with a bombe dessert.

The victims were chosen because of a feature in the fictional magazine in the film which had four chefs and their best dishes in a feature called "The World's Most Fabulous Meal". Jacqueline Bisset's character Natasha O'Brien is the only one of those four chefs not to be killed.