Sourdough Starter - cooking recipe

Ingredients

1 pkg. dry yeast (1 Tbsp.)
1/2 c. lukewarm water
2 Tbsp. sugar
2 c. warm water (105~)
2 1/2 Tbsp. all-purpose flour
6 Tbsp. to 3/4 c. sugar
3 Tbsp. instant potato flakes

Preparation

Mix sugar, potato flour and warm water; let Starter stand out of refrigerator 8 to 12 hours, until very bubbly.