This one's for my mom, who uses apple juice concentrate as a sweetener during the year but has never found one with a Passover hechsher. I thought the Chow hivemind might be more knowledgeable than my puny little brain.
While we're on the subject, are there any artificial sweeteners for Pesach that don't have a vile aftertaste? Splenda has spoiled me for life.
Oh, FWIW, we don't use kitniyot.