AMSTERDAM - A man being held in a Dutch police cell on suspicion of growing pot got an unintended treat in his lunch - a piece of hashish-laced cake - a police spokesman sheepishly admitted yesterday.

“It was an accident,” said Alwin Don, police spokesman in the southern province of Zeeland.

The cake had been seized by police in an unrelated investigation and stored in a refrigerator along with the lunch packets served to jailed suspects.

“Clearly it looked a lot like the other lunch packets,” Don said of the cake, which was served with a cup of coffee on Sunday. But that’s not the most surprising part.

“Officers returned to the cell a half hour later and the suspect told them: ‘I think you’ve given me something you weren’t supposed to,’ ” Don said.

The man had only nibbled at the cake. Cops called in a doctor who declared he suffered no ill effects.

I'm thinking some booking officer's got a lot of 'splainin to do........