When making treats, I try to make them as appealing as possible and like to decorate them. I have been looking for an icing recipe that can be used for decoration that doesn't include sugar. Most of the ones I have found call for yogurt, however they do not harden. I recently purchased a mix which was yogurt based which worked really well however could get costly if I do a lot of treats. I was wondering if I used a royal icing recipe and substituted the confectioner's sugar in the recipe with yogurt powder, would it work?