Getting Started with Sourdough: How to Make a Starter From Scratch

5. Day 4 Onward: Establish Twice-a-Day Feeding Schedule

Just as before, feed your starter by discarding some of your starter and mixing equal parts remaining starter, flour, and water. If you're worried about using a lot of flour for feedings, you can reduce the volume of your mixture. For example, use only 25 grams each of water, flour, and starter. Mix thoroughly, cover, and allow the mixture to rest at room temperature for 12 hours. After 12 hours, repeat the feeding routine. By the end of Day 5 or Day 6, you should have doubled your starter mixture. Continue to feed the starter twice a day until it matures. When the starter has matured, store it in the refrigerator and change schedule to weekly feeding.