Original Sourdough Starter

1 pkg dry yeast
1/2 cup spring lukewarm water
2 Tbs. sugar
2 cups spring warm water
2-1/2 Tbs. plain flour
Dissolve yeast in 1/2 cup of spring warm water, not too hot.  Mix the remaining ingredients.  Then add to yeast mixture.  Let stand in a glass jar covered with a coffee filter outside of the refrigerator for five days to ferment.  Stir at least once a day. The coffee filter will allow wild yeast in the air to enter your jar.  After the five days, use one cup of starter only to feed your starter at least twice a day for 30 days. Throw away all excess starter before each feeding.  The starter needs 30 - 60 days before it is mature.    Once your starter is mature, you may refrigerate it and then feed it at least once a week before baking. 

Tips:
Chlorine can kill yeast, so never use tap water with chlorine.  Spring water is best.
The sourdough flavor will become stronger as the starter matures.  Mature starter may be kept outside the refrigerator for long periods of time with once a day feedings.  Refrigeration can retard the maturing process, so try to delay refrigeration as long as possible.  Refrigeration is for your convenience only, not for the starter.   If you must refrigerate your starter during the maturing process, always feed the starter twice a day the first day outside the refrigerator.  Starter may be frozen if you are unable to feed it for long periods of time.  If you freeze your starter, return to your twice a day feedings outside the refrigerator for several days whenever you want to revive it and start baking again.

 

Potato Flake Sourdough Starter

1 cup warm spring water
1/2 cup sugar
3 Tbs. instant potato flakes
1 package (2-1/4 tsp.) dry yeast
Mix ingredients in a glass jar and cover with a coffee filter.  Let ferment on counter for five days. Stir daily with wooden spoon. Then feed starter with regular starter feeder twice a day for 30 days before refrigerating. 
Starter Feeder: 1 cup warm spring water; 3 Tbs. instant mashed potatoes; 3/4 cup sugar