From Longman Dictionary of Contemporary Englishtoo many cooks (spoil the broth)too many cooks (spoil the broth)TOO/TOO MUCHused when you think there are too many people trying to do the same job at the same time, so that the job is not done well → cook
Examples from the Corpus
too many cooks (spoil the broth)• If too many cooks spoil the broth, too many Popes tarnish the faith!• There were too many cooks, they said. 