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YouTube thumbnail of Mary behind a bowl of sour dough starter and a small bowl of it in her hand.
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5 from 8 votes

How to Make a Foolproof Sourdough Starter

Making a Sourdough Starter is easier than you think.  The secret is to start with rye flour.  You can use freshly ground rye grain for best results.  Or, if rye grain isn't available to you, use rye flour, but make sure it's fresh and not passed its expiration date.
Prep Time15 minutes
Total Time19 minutes
Course: Breads
Cuisine: Americana
Servings: 1

Ingredients

  • 5 tbsp Rye flour preferably freshly milled
  • 4 tbsp Filtered water preferably filtered, chlorine-free

Instructions

  • Day 1 Mix 1 Tbsp. rye flour and 2 Tbsp. room temp/lukewarm water (preferably filtered chlorine-free water) in a small jar or bowl that holds approximately no more than 1 cup. Mix the two ingredients well, incorporating lots of air. Cover the jar or bowl loosely. Place in a warm spot in your kitchen at about 75 degrees Fahrenheit where it can rest undisturbed.
  • Day 2 Do nothing. The starter in the making will probably smell a little sweet - some say like honey. But if not, don’t worry.
  • Day 3 Now stir in 1 Tbsp. rye flour (no water) into your mixture and stir well, incorporating a lot of air. You may see a few bubbles starting but if not, don’t worry. Re-cover loosely and re-place in its undisturbed warm spot.
  • Day 4 Add 2 Tbsp. room temp/lukewarm water and 2 Tbsp. rye flour into your mixture and stir well, incorporating a lot of air. Re-cover loosely and re-place it back in its undisturbed warm spot.
  • Day 4 1/2 After 8 hours or up to 12 hours later check on your starter. It should be bubbly and foamy. If not, don’t worry. If it has not bubbled up and there is no foam, leave it for another 12 hours. Then repeat Day 4 - which is now Day 5 for you. Check it halfway through after 12 hours on Day 5. At this point, it should be ready. If not, rye grain/rye flour was probably very old. The key to success here is to have fresh rye flour.
  • If everything has gone well, and you have a thriving starter, you are now ready to make sourdough bread. Using your rye starter, you will first want to make a "sponge" which you will use to make your sourdough bread. I have included this information in the Recipe Notes below along with a recipe for a No-Knead Sourdough Bread.

Notes

Once you've got your starter, ready you can make your sponge and sour dough loaf of bread. You can find everything you need to know in my post and video on How to Make Sour Dough Bread with Fool Proof Starter.
Don't like the flavor of rye? While it's necessary to make the starter, it's ok to use any flour you want to use to make bread. This way you will not have any rye taste in your final product.
You know your starter is ready when it's bubbly and a foam forms on top of the flour and water mixture.
Be sure to start your starter with freshly milled rye flour. This is essential to creating a good sour dough starter.
If you do not have the option to mill you own, be sure to use milled rye flour purchased from a reputable source so that you know it is fresh. Hodgson Mills and Bob’s Red Mill are usually reliable sources unless you have a local option.