Is it compulsory (Fard)for a wife to cook food for her husband? If she doesn’t will it be a sin?


Praise
be to Allaah.  

Shaykh Ibn Jibreen said: the custom of the Muslims has
always been that the wife should serve her husband in the customary
manner, by preparing food, washing his clothes and vessels, cleaning
the house, etc., according to what is appropriate. This was the custom
at the time of the Prophet and has remained so until the present day,
and no one has objected to it. But the wife should not be burdened in
a manner that causes her hardship or difficulty, rather it should be
in accordance with her ability and what is customary. And Allaah is
the Source of strength. 

See Question no. 10680.