The actress, seeking a fresh start after being treated for mental-health issues, is busy hitting the books at the Fashion Institute of Design & Merchandising in Orange County, Calif. But Bynes, 27, took some time to catch up with her followers and share the pencil drawing.
"New sketch ~ FYI this is my only twitter account, I have no secret twitter accounts. Xoxo Amanda," she wrote, referencing rumors that she has been Tweeting under a pseudonym.
In the past, Bynes's erratic Tweets grabbed headlines throughout her legal and personal troubles – she used the account to start feuds with celebrities like Drake and Miley Cyrus.
New sketch ~ FYI This is my only twitter account, I have no secret twitter accounts. Xoxo Amanda pic.twitter.com/l5grNZOUHl— amanda bynes (@amandabynes) March 10, 2014
But the recovering star made amends March 1, deleting two years' worth of Tweets and thanking fans for their support.
In February, Bynes's attorney said she has been adjusting well to her new life.
"Everything is fine," Bob Wilson told PEOPLE. "She's doing great."