I asked a very similar question in the Diabetes / Insulin Resistance / Metabolic Syndrome forum:

Chocolate, Ice Cream, etc.?

Aside from the occasional little bag of chemicals known as "fat-free, sugar-free instant pudding" (Eat it quick before the chemicals die!), various diet sodas (they stopped selling my favorite root beer in 2 liter bottles in my area), and fresh fruit, not a whole lot.

Every sugar-free "ice cream"/frozen dessert I've tried so far has been pretty vile. The sugar-free chocolate made with sugar alcohols that's sold in our area is actually pretty good, but since my PN still thinks it's sugar, I don't do that anymore. There's also an issue with the stuff being a cramp-inducing laxative.

I've been experimenting with various sweeteners—aspertame, sucralose, saccharin, and DW just picked up some stevia, which we haven't had a chance to try yet. I'm also curious about neotame, but I haven't actually seen or tried any yet.

If I can figure out a way to make a palatable fudge or decent chocolate candy, I'll be all set.

Doc