I've been trying to figure this out myself.........there is places online to order sugar free marshmallows believe it or not........and someone on here told me if I mix splenda with cornstarch in a food processor I can make a substitute for powdered sugar......however I haven't tested this out myself yet! HTH you some.
Im constantly reading through cooking blogd and many of them belong to a group called "Daring Bakers", all of them will bake the same thing and blog about it. One of the challenges was to make homemade mashmallows. I know that I read that someone used splenda or a mix of splenda and sugar to make them, I just know it. That being said I have no clue what so ever what blog it came from.
But I do know that its been done before, it that helps you at all. Maybe google Daring Bakers and read through a few blogs. Perhaps you could email one of them and ask if they know of the original Splenda marshmallow baker....
Quote by @%username% on %date%
%body%