Thanks: 
Hmm, this is such a long shot, but for years now I have been trying to find this movie, and cannot find it through google anywhere, I've tried so many search words/phrases to find it, and nothing.
It's based on a true story.
I always thought the title was "What about Amy?" but since I can't find anything on that for years now, it might not have been called that.
It's about a mom and her daughter.
One evening, the mom goes to evening school or goes to do some late night grocery shopping (can't remember which one, but she does leave in the evening), and leaves her young daughter home alone.
The daughter tries to cook something, but it all goes wrong, which ends up with social services taking the daughter away, and the mother can't seem to get her back, and the daughter goes into foster-care.
