There is no evidence that a woman has to cover her head when cooking
12-2-2015 | IslamWeb
Question:
assalam o alykum i have read somewhere that nabi saw went to some ones home and he did not meal their because the women of that house made meal without covering there head. so wanna ask this that is it sahih or daif. jezakkillah
Answer:
All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
We have not come across any basis for this statement in any Hadeeth, whether Saheeh (sound), or Dha‘eef (weak) or fabricated, and the scholars have not stated that it is recommended for a woman to cover her head when cooking food, and nor that it is recommended not to eat the food that is cooked by a woman who did not cover her head.
It is not permissible to attribute to the Sunnah of the Prophet 
something that is not confirmed to be authentic concerning it. The Prophet, sallallaahu ‘alayhi wa sallam, said: "Whoever tells a lie against me intentionally, surely let him occupy his place in the Fire." [Al-Bukhari and Muslim]
The Prophet, sallallaahu ‘alayhi wa sallam, also said: "Whoever relates a narrative about me which he knows is false, then he is one of the liars." [Muslim]