Many lives ago, when I was a teenager, I worked at a local donut shop... yes, this was before the days of Dunkin Donuts. I never wrote down the recipe, but I remember whipping up the creme filling and there being some mystery ingredient that the boss bought in a round cardboard container, probably a few pounds at a time. It was a powder of some sort that he treated like gold. The creme filling that resulted was light and wonderful. There used to be a few places that had similar filling, but I can only think of one that has survived (and every time I get there, they're sold out!). All the other places now use some filling that is like icing, leaving a greasy mouth feel. Does Johnny Q. Public really like that stuff?