Here is another holiday special that my childhood neighbor made every year:
1/2 cup mashed potato (either leftovers or cook 1 med potato & mash)
1/2 tsp vanilla
1 box confectioner’s (powdered) sugar
Peanut butter (about 1 cup); chunky or plain
Cool potato until warm in bowl. Mix vanilla. Add sugar gradually to mix well until stiff enough to roll–consistency of pie crust. Transfer to wax paper dusted with powdered sugar. Place another piece of wax paper on top. Roll to thin, rectangle shape. Remove top wax paper. Spread on peanut butter to cover surface and edges. Log roll the dough. Cover with wax paper (you can use the bottom sheet). Chill for 3-4 hours. Remove wax paper and cut into 1/2 inch pinwheels.
These are rich and quite yummy. I store mine in a cookie tin lined with wax paper and in between layers.