NOTE! I drew this in the span of ... five minutes! I didn't do any research on what a treacle tart looks like! So it looks like a brownie .... lolz.
If you read over the chapter "The Half-Blood Prince" in Harry Potter and the Half-Blood Prince, it talks about a love potion that emits the scents of things a person likes.
Among these is the smell of treacle tarts.
And then, you start to realize that he's been eating those a lot since book 5. O__O
I think it looks rushed and messy (that's strictly from an artist's point of view, and is nothing personal against you). I think if you had spent more time on it and put the extra effort in to clean it up a bit, it would have turned out much more professional looking.