The truck swerved sharply to avoid an animal and subsequently overturned, spilling its sugary cargo across the road.
Monday morning commuters in and out of Stege, the rural island’s largest town, were forced to find alternative routes.
It is not known whether the truck was carrying Christmas treats.
But the spillage block the entire roadway between between Stege and Queen Alexandrine Bridge, which connects Møn to Zealand.
The clean-up was expected to be completed during the morning, South Zealand and Lolland-Falster Police tweeted.
Police were alerted to the accident at 1:31am on Monday.
“The driver told me he was trying to avoid an animal. Probably a deer or something else wild. The truck then skidded, causing the trailer to overturn. The truck itself did not overturn, but ended up on the verge of the road,” police duty officer Ole Hald said.
The driver was unhurt in the incident.
“But he is naturally a bit shaken up,” Hald said
The overturned trailer was packed with sugar, complicating the clean-up.
“We need special vehicles down there to suck the sugar out of the tanker and take it away. After that, we can begin to pull the trailer upright,” Hald said.
“It is both time and resource-consuming, so we don’t expect to be ale to open the road until (later) this morning,” he added.
Stege is the largest town on Møn and has a population of around 4,000.