After the Spotlight:
He grew up to be a big-shot Hollywood attorney.
Many child stars ride out their one shtick until they're septum-deep in a bucket of Bolivian Marching Powder, but Cohen avoided child star purgatory. He dropped the acting (and the weight) and attended UC Berkeley, where he rode out his one shtick to campus fame: Cohen ran for Student Body President on the platform "Vote for Chunk" and performed the Truffle Shuffle at Cal football games.
After obtaining his undergrad, Cohen attended UCLA Law and later founded his own media law firm, which is sadly not named Chunk, Sloth & Associates.
In 2008, Cohen was named one of The Hollywood Reporter's Top 35 Executives under 35. We assume Cohen entered law to defend the less fortunate of the world (or at least greater Los Angeles). After all, the Truffle Shuffle basically set fat kids' civil rights back 20 years.