Firefighters opened a oven at a property in Sheffield to find a stash of Penguin biscuits, Cadbury's Fingers, Digestives and even bags for life.
Commenting on Twitter, South Yorkshire Fire and Rescue said: "Our firefighters carrying out a home safety check yesterday were greeted with this #hownottouseyouroven #firesafety."
The cooker blunder has now been picked up by national titles including The Daily Mail.