Germans from Russia - Potato Candy

I'm sure that this was found in rural households of all backgrounds back in the day. Here are two versions:

Contributed to the Germans From Russia Heritage Collection by Patricia Baron:

Potato Candy Boil one small potato until done. Put the potato into a bowl and mash. Add enough powdered sugar to the potato until it gets firm. You can roll this out like a pie crust and spread it with peanut butter. Roll this up as you would a jelly roll and cut into slices. https://library.ndsu.edu/grhc/foods/recipe/potato.html

From an old newspaper clipping of unknown origin:

Potato Candy 2 to 3 medium potatoes 1.5 to 2 pounds of confectioner's sugar 1 teaspoon vanilla 2 tablespoons of butter Peanut butter Cook potatoes, peel and mash; cool to lukewarm or able to handle. Add next three ingredients, blending well. The sugar amount will vary according to size of potatoes. The dough should be quite stiff, but not too dry. Roll out on waxed paper or board, lightly sprinkled with powdered sugar, to a rectangle shape. Spread with peanut butter (1/4-inch thick) and roll up as for jelly roll. Slice and place cut-side-down, on platter. May be eaten immediately or kept in freezer for some time.