Whether the thieves had planned to steal the sweets or simply came across the loot remains unclear, German media reported a police spokesperson as saying.
Police believe another truck or van must have towed the trailer filled with the sweet treats away on Saturday night because a car would not have been able to tow such a heavy cargo.
"Anyone offered large quantities (of chocolate) via unconventional channels should report it to the police immediately," reads a police statement, according to German newspaper Deutsche Welle.
Reports of the sweet heist are making many on Twitter laugh out loud.
"If anyone offers me large quantities of chocolate the LAST thing I'd do is report it," jokes one person on the microblogging platform. "If I find twenty tons of Nutella, I'mma swim in it like Scrooge McDuck," jokes another.
Me driving away with a truck full of Nutella pic.twitter.com/5Ta9fBBVvR— wil, son. (@will0suave) August 15, 2017
Another trailer, packed with 30 tonnes of fruit juice, was also reported stolen in Germany over the weekend.
Click for more trending news