Mr Chavot (left) said he "forgot where he was" and thought he was in his own kitchen
The BBC has received 40 complaints about a television chef who swore during a live morning broadcast.
Viewers complained after the pressure got to Michelin-starred chef Eric Chavot during an omelette-making contest on BBC One's Saturday Kitchen.
A BBC spokeswoman said the programme's presenter, James Martin, and Mr Chavot apologised to viewers immediately.
She said the corporation was "very sorry" for any offence caused, and that Mr Chavot simply "forgot where he was".
Mr Chavot said during the 1000 BST broadcast on BBC One that he was so comfortable on the set he thought he was in his own kitchen at home.
The BBC spokeswoman said: "On this morning's edition of Saturday Kitchen, which is a live programme, guest chef Eric Chavot, whilst participating in the programme's omelette cooking competition, forgot where he was and used offensive language.
"We are very sorry if any viewers were offended by this. James Martin, the presenter of the programme, immediately apologised to viewers and Eric himself also gave a sincere apology."