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Ultimate Beginner’s Guide: How to Make and Maintain a Healthy Sourdough Starter From Scratch

A glass jar filled with active, bubbly sourdough starter showing significant aeration and rise.

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Learn how to create your own natural yeast culture for artisan bread making. This guide covers the simple steps for beginners to make a bubbly, active sourdough starter using only flour and water.

Ingredients

Scale
  • 100g Whole Wheat or Rye Flour (for initial activation)
  • 100g Unbleached All-Purpose Flour (for maintenance)
  • 100g Unchlorinated Water (room temperature)

Instructions

  1. Combine 50g of whole wheat or rye flour with 50g of room temperature water in a clean glass jar. Stir well until no dry flour remains. Cover loosely and let it sit at room temperature (ideally 70-75°F) for 24 hours.
  2. On Day 2, discard half of the mixture. Add 50g of all-purpose flour and 50g of water to the remaining starter. Mix thoroughly, cover loosely, and wait another 24 hours.
  3. Repeat the feeding process (discard half, feed 50g flour, 50g water) every 24 hours for Days 3 through 6. You should start seeing small bubbles.
  4. By Day 7, if your starter is consistently doubling in size within 6-8 hours after feeding, it is considered active and ready to use for baking your first sourdough loaf.
  5. To maintain your active starter, switch to a daily feeding schedule if keeping it on the counter, or refrigerate it and feed it once per week.

Notes

  • Use unbleached flour for the best results when creating your natural yeast culture.
  • If you notice a layer of dark liquid (hooch) on top, stir it in or pour it off before feeding. This means your starter is hungry.
  • A consistent feeding schedule is key to developing a strong, bubbly active starter.
  • If you are baking infrequently, store your starter in the refrigerator and feed it the day before you plan to bake.

Nutrition