Not sure. I've made them twice. The first time I used fruit juice instead of the water, thinking that would also make them sweet. I think I didn't realize they have absolutely NO sugar in them to begin with (I think that is true). The texture was actually not too bad, but they were really not sweet at all. The next time I made them the texture was really really off. I haven't tried again.
I don't see why you couldn't use coconut oil.
good luck, let me know how they turn out! Sometimes when you've been deprived for a long time the plainest stuff seems wonderful.

~Tracy