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Sourdough Starter Recipe

This recipe guides you through cultivating a vibrant sourdough starter using just flour and de-chlorinated water. Over several days, you'll establish a robust culture through consistent feeding and careful observation, developing the essential leavening agent for authentic sourdough baking. Patience and attention to temperature are key for a successful, active starter.
Total Time 14 days
Course lunch/dinner
Cuisine American
Servings 1 people
Calories 2094 kcal

Equipment

  • 1 Digital Kitchen Scale Essential for precise measurement of flour and water for consistent hydration.
  • 2 Glass Mixing Bowls For initial mixing and subsequent feeding, ensuring enough space for aeration and cleaning.
  • 2 Wide-Mouth Glass Jars with Lids Ideal for fermenting and storing the starter, allowing for easy observation and access.
  • 1 Rubber Spatula For thorough mixing to ensure no dry flour pockets remain, which can inhibit starter development.
  • 1 Loose Cover/Plastic Wrap To cover the jar loosely, allowing gas exchange while preventing the starter from drying out.

Ingredients
  

Main

  • 600 g 21 ounces unbleached all-purpose, bread, or whole grain flour (such as whole wheat or rye flour), or a mix
  • Bottled filtered, or de-chlorinated water

Instructions
 

  • Initial Mix: In a clean glass jar, combine 50g unbleached all-purpose, bread, or whole grain flour with 50g de-chlorinated water. Mix thoroughly with a spatula until no dry spots remain and the consistency is like a thick batter.
  • First Fermentation: Cover the jar loosely (e.g., with a lid, plastic wrap, or a cloth secured with a rubber band) and let it rest at room temperature (ideally 70-75°F / 21-24°C) for 24 hours.
  • First Discard and Feed (Day 2): Discard all but 50g of the starter from the jar. Add 50g fresh flour and 50g fresh de-chlorinated water to the remaining starter. Mix well, cover loosely, and return to room temperature for another 24 hours.
  • Continued Daily Feedings (Days 3-7): Repeat the discard and feed process daily: remove all but 50g of starter, add 50g flour and 50g water, mix, and cover. Observe for signs of activity like bubbles, a tangy aroma, and a slight rise.
  • Increasing Frequency (if needed): As activity increases, you may need to feed every 12 hours instead of 24, especially if the starter peaks and begins to fall significantly before the next feeding.
  • Readiness Check: Your sourdough starter is considered active and ready for baking when it consistently doubles in size within 4-8 hours after feeding and has a lively, bubbly texture and a pleasant, yeasty-tangy smell.
  • Float Test (Optional): To confirm readiness, drop a small spoonful of active starter into a glass of water; if it floats, it's ready.
  • Post-Activation Storage: Once active, you can store your starter in the refrigerator. Feed it once a week with a 1:1:1 ratio (starter:flour:water) after discarding most of it.
  • Preparing for Baking: When you want to bake, remove the starter from the fridge, feed it, and let it become fully active and bubbly at room temperature before incorporating it into your recipe.
  • Maintaining Health: Regularly observe your starter for any unusual smells or discoloration. A healthy starter should smell sweet-sour and yeasty, never foul or moldy.

Notes

The quality of your water is paramount; chlorine can inhibit yeast activity, so filtered or de-chlorinated water is crucial. Maintaining a consistent room temperature (70-75°F) will foster a more vigorous starter. Initially, activity might be slow, but patience is key. Using a portion of whole grain flour (e.g., rye or whole wheat) in your initial feeds can significantly boost microbial activity and accelerate the process due to higher nutrient content. Always discard the majority of your old starter before feeding to ensure a healthy feeding ratio, which prevents the starter from becoming too acidic or diluted. Observe for a consistent rise and fall, and a pleasant tangy aroma, indicating a robust culture. Avoid airtight containers, allowing gases to escape during fermentation. Proper cleaning of jars between feedings helps prevent unwanted mold.