Miss robin hood (1952)

In this delightful fantasy adventure, a mild-mannered writer of adventure stories for girls finds himself presented with an intriguing proposition from an elderly fan. She suggests that they conspire to steal a secret whiskey formula from ruthless distillers, who themselves stole it from her family in years gone by. With the recipe back in hand however, it's not long before they attract attention from the Inspectors of Scotland Yard.