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Sourdough Starter Recipe (Easy Homemade Guide for Beginners)

Active bubbly sourdough starter in glass jar ready for baking bread

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Learn how to make your own sourdough starter from scratch with this easy, beginner-friendly guide. Create a living, wild yeast levain for delicious homemade sourdough bread with just two simple ingredients.

Ingredients

Scale
  • 1/2 cup (60g) whole wheat or rye flour (for Day 1 kickstart)
  • 1/2 cup (60g) all-purpose flour (for ongoing feedings)
  • 1/2 cup (120ml) warm water, around 80°F/27°C

Instructions

  1. In your clean glass jar, combine 1/2 cup (60g) whole wheat or rye flour with 1/2 cup (120ml) of warm water. Stir thoroughly until no dry flour remains. Loosely cover and let sit in a warm spot (70-80°F) for 24 hours.
  2. Discard half of the starter (about 1/2 cup or 60g). Add 1/2 cup (60g) all-purpose flour and 1/2 cup (120ml) warm water to remaining starter. Stir well, cover loosely, and rest for 24 hours.
  3. Repeat daily at the same time: discard half the starter, feed with 1/2 cup (60g) all-purpose flour and 1/2 cup (120ml) warm water. Continue until starter consistently doubles in size within 4-8 hours after feeding.
  4. Your starter is ready when it doubles reliably, shows lots of bubbles throughout, has a pleasant sour smell, and passes the float test (small spoonful floats in water).

Notes

  • Keep starter in a warm spot (70-80°F) for best results. Cold kitchens slow fermentation significantly.
  • Use a kitchen scale for accurate 1:1:1 ratio by weight of starter:flour:water for consistent results.
  • If you see hooch (grayish liquid on top), stir it back in or pour off before feeding. This means your starter is hungry.
  • Building a mature starter takes 7-14 days depending on environment. Be patient and maintain daily feedings.
  • If using heavily chlorinated tap water, let it sit out 24 hours or use filtered water.
  • Store active starter in the fridge and feed weekly if not baking frequently. Reactivate with 2-3 feedings before using.

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