The incident happened on November 17 but North Yorkshire Police has only just released details.
At 4pm a man entered the Co-op in the town before leaving without buying anything and stood outside the store entrance.
A second man walked immediately and put a packet of meat in his jacket pocket and left without paying.
The first man then reached into the doorway and grabbed a tub of Quality Streets and ran off with the other man.
Anyone with any information is asked to contact police. Dial 101, press 2 and ask to speak to PC 1374 Jayne Lewis or email [email protected]
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111. Quote reference number 12170206886.