Put potatoes in large bowl (one can use instant potatoes to make 1/4 cup). Add salt, sugar, vanilla, coconut and butter. Mix well. Knead several minutes, adding more sugar, if necessary, to make a stiff dough. Tear off a teaspoon of dough and form into a small log shape. Roll in cinnamon. Lay on wax paper for 1 hour to dry. Store in air tight container.