Does anyone remember a cookie from the 70s that would have been like a mallomar, but had a white coating?

I'm trying to help my mother remember a cookie she used to love in the 70s, but can't find it any longer. It had a cookie or flat cake on the bottom, and a dollop of a marshmallow creme, then maybe a sprinkling of graham cracker-type crumbs before being entirely covered in a white vanilla or white chocolate covering. I imagine it was very similar to a mallomar, but not dark chocolate. Anyone have an idea?