Is this an annual event? Seems to me that I’ve read this story here before.
You may be thinking of the Boston Molasses Disaster of 1919. It was the first thing that came to my mind.
https://en.wikipedia.org/wiki/Great_Molasses_Flood
Can’t seem to find it. There was this tippy truck in Poland:
https://gizmodo.com/oops-a-tippy-truck-spilled-tons-of-sticky-chocolate-al-1825897677
I wasn’t thinking of Willie Wonka. . . .
there was the Great Molasses Flood
of January 15, 1919 in Boston MA
https://en.wikipedia.org/wiki/Great_Molasses_Flood
Last May in Poland
Chocolate spill makes for sweet mess on highway
https://abcnews.go.com/International/chocolate-spill-makes-sweet-mess-highway/story?id=55041587