1 lg. potato (peeled, cubed)
2 tbsp. sugar
2 c. flour

Place potato cubes in a pan, cover with water and boil until completely done and very soft. Drain and reserve liquid from potatoes, measuring to make 2 cups (add water if necessary).

Mash potatoes thoroughly, add the 2 cups potato water. Add sugar, beat the flour into potato water until smooth. Put into a glass or plastic bowl, cover loosely with aluminum foil, let set in a warm place to ferment. Stir once daily. Allow to ferment 5 to 7 days. Store in refrigerator.

To use, set out the night before. To replenish, add 1 cup potato water, 1 cup flour, 1 tablespoon sugar. If starter is not used in 10 days, add 1 tablespoon sugar.