Go Back Email Link
–+ servings
Homemade sourdough starter in a glass Weck jar on the kitchen counter.

How to Make a Sourdough Starter (Step-by-Step for Beginners)

Learn how to make a sourdough starter from scratch with this easy, no-scale, beginner-friendly recipe. No store-bought yeast required, just flour, water, and time.
Prep Time: 5 minutes
Waiting Time: 7 days
Total Time: 7 days 5 minutes
Yield: 1 cup
Calories: 160kcal

Equipment

  • Wood spoon
  • Glass container with a loose-fitting lid

Ingredients

  • Organic all purpose flour
  • Filterered water (chlorine-free)

Instructions

  • Day 1: Start the Culture
    Combine 1/3 cup flour and 1/4 cup water in a glass jar.
    Stir until smooth and lump-free.
    Cover loosely and let sit at room temperature (70°F) for 24 hours.
  • Day 2: Discard & Feed
    Check for bubbles or a mild sour aroma.
    Discard half of the starter.
    Add 1/3 cup flour + 1/4 cup water. Stir well.
    Cover and rest at room temperature another 24 hours.
  • Days 3–7: Daily Feedings
    Each day: Discard half, feed with fresh flour and water (same amounts).
    Look for bubbling, a sour smell, and volume increase.
    By Day 5–7, your starter should double in size after a feeding.
  • Day 7: Is It Ready? Do the Float Test
    Drop a spoonful into a glass of water. If it floats, it’s ready to bake!
    If it sinks, keep feeding daily until it passes the test.
    Note: The float test isn’t foolproof but is a good indicator.

Nutrition

Serving: 1cup | Calories: 160kcal