I made these back in the late 1970's. I probably used a homemade dough to form the donuts and then used baby powder to coat them. The plate is a bottle cap liner that I gave a little green edge to. I'm not sure why green, but I guess it worked. The point to this item is that it didn't cost me anything. I was in high school and I didn't have any money anyway.
I've been making dollhouse stuff for a very long time. The two picture below show the a bridge for the Enterprise from Star Trek. You can see it's mostly out of cardboard and toilet paper tubes. This idea could be used for any type of doll, it's so easy any could could do it.