In 1991, he starred as Linus Bragg in the movie Carolina Skeletons (or The End of Silence), about an African-American boy in the mid-20th century South who was wrongfully executed at the age of 14. The movie was based on a novel, both of which were based on the true events regarding the arrest, conviction and execution of 14-year-old George Stinney. Blank appears in the feature film Boomerang. He portrayed Michael Peterson in the TV series The Parent 'Hood in the mid-1990s.
Since 1998, Blank has cinematographed, edited and directed a number of short films.
Blank provided the voice of the character Darren Patterson on the Nickelodeon animated series As Told by Ginger (2000–06), as well as earning a small role in All Grown Up!, as Sulky Boy's band member J.T.. He also appeared in Silent Story and Delivering Milo. Notable guest appearances on television shows include roles in City of Angels, Living Single, and Freaks and Geeks.
