Sourdough Starter - cooking recipe

Ingredients

1 envelope dry yeast
1/2 c. warm water
2 c. buttermilk (dairy)
2 c. flour
2 c. sugar

Preparation

Soften yeast in warm water with sugar.
Let stand 5 minutes or doubled in volume.
Mix next 3 ingredients together until smooth. Add yeast mixture.
Then pour into large enough container to let triple in volume (non-metal).