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closeup view of sourdough starter in jar
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4.48 from 23 votes

How to Make a Sourdough Starter

How to make a sourdough starter from scratch using flour and water.
Prep Time7 d
Total Time7 d
Course: Bread
Cuisine: American
Servings: 1
Calories: 352kcal
Author: Amy Duska

Ingredients

  • whole wheat flour
  • all-purpose flour
  • filtered water

Instructions

  • Day 1 -  First thing in the morning ... in a glass jar, combine the following: ½ cup flour, and ⅓ cup filtered water. Use a spatula to vigorously stir the flour and water together until there are no clumps. Scrape down the sides of the jar, cover with the loose fitting lid. Set the jar in a cool, shaded spot for 24 hours.
  • Day 2 - In the morning stir the starter to incorporate air into the mixture, scrape down the sides of the jar and cover with a loose fitting lid. Set the jar in a cool, shaded spot for 24 hours.
  • Days 3-7 - Morning - Discard and Feed To a clean jar add the following: 3 tablespoons STARTER (40 grams), ½ cup of the FLOUR mixture (80 grams), ⅓ cup of filtered WATER (80 grams). Stir vigorously with a spatula until well combined. Scrape down the sides of the jar and cover with a loose fitting lid. Let sit for 12 hours.  Evening - Feed To the jar of STARTER add: 2 tablespoons of the FLOUR mixture and 1.5 tablespoons filtered WATER. Stir vigorously with a spatula, scrape down the sides and cover with a loose fitting lid. Let sit for 12 hours.
  • Day 8 - Perform the float test by dropping 1 tablespoon of starter into a bowl of room temperature water. If it floats, it is ready to bake bread. See my Beginners Sourdough Bread Recipe. If it does not float, continue to discard and feed every day until it passes the test.

Nutrition

Calories: 352kcal | Carbohydrates: 74g | Protein: 12g | Fat: 2g | Saturated Fat: 1g | Sodium: 7mg | Potassium: 235mg | Fiber: 7g | Sugar: 1g | Calcium: 17mg | Iron: 4.1mg