Blame it on Love (1940)

A 1940 film by Wilding Picture Productions, starring Joan Marsh and John 'Dusty' King.

Brief Summary:
The plot involves a wealthy manufacturing heir who elopes with a nightclub singer who can't cook. When the couple break up, the singer goes to cooking school, learns how to use Hotpoint appliances, and prepares the perfect meal for her estranged husband. They reunite and the accomplished cook earns the respect of her formerly unsupportive in-laws. (Summary from Library of Congress)