I think last year it got removed from the snack credit list because of the difficulty keeping track of their fluctuating policies, but from what I remember, you can no longer use snack credits on any of the "make your own treat" items (possibly a very limited selection of the make your owns still remain eligible - that was one of the things nobody could figure out, because some were being told at the counter that certain make your own items were eligible, but when they got to the cashier the story was different).
But you can use them for pre-made items.