Police have found £4,000 worth of the drug inside a bag dumped beside a road in Idle, near Bradford.
They're now trying to trace its origins after tests revealed the substance was cocaine.
PC Sam Brown tweeted:
"Interesting day today; small money bag full of white powder found by member of the public at the side of the road in Idle...tested at the station and it's cocaine with a rough value of £4,000! Enquiries ongoing, if it's yours I'd like a chat please"