1. Place 1 cup milk in large glass jar, cover with cheesecloth and let stand at room temperature for 24-36 hours.

2. Stir in 1 cup flour. Cover with cheesecloth and set outdoors for 24 hours.

3. Set mixture in a warm place indoors until it is full of bubbles (3 to 5 days).

4. Store in a covered container in refrigerator. Use only part of the starter each time. Replenish by adding equal parts of milk and flour.