Learn how to make a sourdough starter recipe from scratch with just flour and water. This versatile ingredient can be used to make breads, cakes, cookies, and so much more.

If you hang around the traditional foods community, chances are you have heard of making homemade sourdough starter from scratch.

I have had my homemade starter for over six years now. It is vital in my traditional food kitchen.

What Is A Sourdough Starter?

A sourdough starter is a live active culture made of fermented flour and water that is full of beneficial bacteria and yeasts.

It is used as a way to ferment recipes and naturally rise bread.

Why You Will Love Sourdough:

If you are unfamiliar, let me fill you in on all the reasons why crazy folks, like me, go through the effort of handcrafting, and maintaining, a beneficial colony of yeasts and bacteria in their kitchens.

Before yeast was isolated and sold in little packets, sourdough starter was a valuable commodity in homes and families, passed down for generations.

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Health Benefits

Have you ever heard of phytic acid? Basically, it’s an antinutrient found in grains, beans, and nuts that interferes with the absorption of certain nutrients. They are present on grains to keep them from spoiling.

There is a reason they are there, but there is also good evidence that our bodies weren’t meant to handle them. Proper preparation of grains eliminates most, if not all, of the phytic acid in offending foods.

This is the very reason traditional cultures soaked and fermented their grains, seeds, and beans. These days, we’ve lost that art. And what have we found? People can’t handle grains anymore.

Instead of using instant yeast packets, people in traditional cultures leavened their bread with a fermented starter that captured all the yeasts in the environment.

AKA Sourdough starter

How on earth do we capture native yeasts? Read on, because I explain how to make your very own starter.

Because I love good food

I already confessed my foodie tendencies with you all. I reckon it’s the same inclination that led me into the world of homemade sourdough.

Locally made sourdough starter, with the native yeasts of the area present, is certainly the thing a foodie’s dreams are made of. A jar of healthy, productive starter is teaming with life, as evidenced by all the bubbles you will see rising to the surface.

Once you’ve experienced homemade sourdough baked goods, store-bought breads and pancakes simply don’t cut it. Sourdough has a depth of flavor that just can’t be found in something made quickly with a packet of instant yeast.

This post contains affiliate links, which means I make a small commission at no extra cost to you. See my full disclosure here.

FAQ:

hand holding a wooden spoon in a bowl of sourdough starter with a blue and white towel to the left

How long does it take to make sourdough starter?

It takes about a week to create an active sourdough starter, but sometimes it can take about two weeks to make a starter ready to bake bread.

Do you have to discard sourdough starter every time you feed it?

When you are first creating your sourdough starter, yes. If you don’t discard you will have so much starter that it will be hard to keep healthy. This is because the more starter you have the more flour and water you will need to add for the yeasts and bacteria to feed on.

After having a starter for a while rather than discarding you can just use it in discard recipes. This is a much more useful way of removing some of the starter rather than throwing it in the trash.

How do you know your sourdough starter is ready to use?

You will know your sourdough starter is read to use when you feed it and after 4-12 hours it doubles in size and is super bubbly. A good way to be able to determine this, is to place a rubber band where the top of the starter is after you feed it. Then after a few hours have passed you can see just how high it has grown.

Another way is to perform the float test. Take a small glass of room temperature water. Add a quarter sized dollop of active starter. If it floats, it is ready to bake with. If it doesn’t it is not active enough.

Sourdough Starter Recipe:

By now, you know why you want to have a bowl of sourdough starter bubbling away in your kitchen, but how the heck do you make one?

Ingredients

Flour (Whole grain wheat, unbleached all-purpose, and einkorn are all great choices.)

Filtered water (I use a Berkey water filter. We have the Royal size for our family of 7. You can find my full Berkey review HERE.)

Tools

Glass bowl (Metal can react with beneficial bacteria and yeasts.)

Wooden spoon

Tea towel

How To Make Sourdough Starter

Day 1:

On day one, mix one cup of flour and one cup filtered water. Stir vigorously, making sure to scrape down the sides and incorporate everything. Place a clean tea towel over the bowl and set aside. Allow it to sit for 24 hours.

Day 2:

On day two, discard half of the mixture and repeat the process. Add one cup flour, one cup water, stir vigorously, and cover.

Why do you have to remove half the mixture? By day four, you would have sourdough starter overflowing from your bowl. Also, removing half ensures that the right amount of flour and water is feeding the growing colony of beneficial yeast. If you weren’t discarding half, the cup of flour wouldn’t be enough to feed them on days three and four. Basically, you would end up with a lot of extra starter by the end of the process, and none of it would be mature.

Day 3-5

Repeat the day two instructions for days three, four, and five.

Day 6-7

On days six and seven, do the same but feed it every 12 hours, instead of every 24.

By day seven, there should be enough beneficial bacteria and yeast present to bake sourdough bread and other fermented sourdough goodies, like pancakes and english muffins.

You will know it’s working if it bubbles, and doubles in size.

Sourdough Starter Maintenance

Once your sourdough starter is alive and active, there will be some maintenance to keep it going for years and years.

In the refrigerator for occasional use

Storing it in the refrigerator slows down the fermentation process, so one feeding per week, or every other week, is sufficient.

I usually use my starter a couple times per week. If I plan to make pancakes Saturday morning, for example, I will pull my starter out of the fridge Friday morning and add flour and water. By Saturday morning it is bubbly and ready to go.

I remove the two cups of starter needed for my pancake recipe, and put the “master starter” back in the fridge. Since it was fed the day before, it is good to go for another week, or whenever I need it next.

On the counter for daily use

Since the “little guys”, as my kids like to call the bacteria in the starter, are active at room temperature, they will have to be fed more often if keep it in this state.

If you leave your starter out on the counter, you will need to add flour and water every day. You will also have to be baking every day to use up all that starter.

Most people probably won’t use the starter quite so much, unless you own and operate a bakery. I would recommend storing it in the refrigerator between uses.

Video tutorial on how to make a sourdough starter from scratch

Helpful Resources

Every day I get loads of questions about sourdough starter, so I devoted a whole post called, How to Care for Sourdough Starter filled with your questions and my answers. You can use this post a reference guide.

Thank you so much for stopping by the farmhouse! I hope this is just the beginning of our sourdough journey.

Check out my other sourdough recipes and posts

If you try this recipe and love it, I would love if you gave it 5 stars! Also, tag me on Instagram @farmhouseonboone.

Sourdough Starter

4.53 from 1187 votes
Learn how to make a homemade sourdough starter from scratch. Video tutorial also includes sourdough health benefits and our favorite ways to use sourdough starter in the farmhouse.
Additional Time: 7 days
Total: 7 days
Servings: 1 sourdough starter
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Ingredients

  • Flour, Whole grain wheat, unbleached all purpose, and einkorn are all great choices.
  • Filtered water

Instructions 

  • On day one, mix one cup of flour and one cup filtered water. Stir vigorously, making sure to scrape down the sides and incorporate everything. Place a clean tea towel over the bowl and set aside. Allow it to sit for 24 hours.
  • On day two, discard half of the mixture and repeat the process. Add one cup flour, one cup water, stir vigorously, and cover.
  • Repeat the day two instructions for days three, four, and five.
  • On days six and seven, do the same but feed it every 12 hours, instead of every 24.
  • By day seven, there should be enough beneficial bacteria and yeast present to bake sourdough bread and other fermented sourdough goodies, like pancakes and english muffins. You will know it’s working if it bubbles, and doubles in size.

Notes

Sourdough Starter Maintenance

  • Once your sourdough starter is alive and active, there will be some maintenance to keep it going for years and years.

In The Refrigerator For Occasional Use

  • Storing it in the refrigerator slows down the fermentation process, so one feeding every week, or every other week, is sufficient.
  • I usually use my starter a couple times per week. If I plan to make pancakes Saturday morning, for example, I pull my starter out of the fridge Friday morning and add flour and water. By Saturday morning it is bubbly and ready to go. I remove the two cups of starter needed for my pancake recipe and put the “master starter” back in the fridge. Since it was fed the day before, it is good to go for another week, or whenever I need it next.

On The Counter For Daily Use

  • Since the “little guys”, as my kids like to call the bacteria in the starter, are active at room temperature, they will have to be fed more often if kept in this state.
  • If you leave your starter out on the counter, you will need to add flour and water every day. You will also have to be baking daily to use up all that starter.
  • Most people probably won’t use the starter quite so much, unless you own and operate a bakery. I would recommend storing it in the refrigerator between uses.

Nutrition information is automatically calculated, so should only be used as an approximation.

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2,961 Comments

  1. William L Petty says:

    You don’t mention it but if it takes 2 cups of starter to make bread I would guess that I will need a large glass bowl to keep and feed my starter I’m. What size glass bowl is best.

    1. Lisa Bass says:

      I like to use a quart size mason jar!

  2. Robyn Long-Navas says:

    Hi Lisa,
    I’m excited to be trying the sourdough starter!! I went for longer than 6 days before going to twice a day – will that cause a problem? Also, I just realized that I was supposed to keep adding 1 cup of flour and 1 cup of water after discarding half. I was adding 1/2 cup of flour and 1/2 cup of water each day after day 1. Today is probably day 11 and is the first day that I will feed twice a day. Should I start doing a full cup each of water and flour? Otherwise my starter seems to be doing OK – it has been rising about 25-50% and getting bubbly the last few days. Thank you!!

    1. Lisa Bass says:

      No, that is fine! Sounds like it is ready to go.

  3. Erin says:

    I’ve been following this recipe but my starter seems super runny and it’s day 7. Any advice?

    1. Lisa Bass says:

      Are you discarding each time? You can try upping the flour amount slightly.

      1. Amy says:

        I have the same issue. It is super runny and has a good amount of the “hooch” on top. I have been following the directions for discarding and adding flour and water as indicated in the directions and using a glass mason jar since I didn’t have a glass bowl. I use a scale to discard half.

        1. Lisa Bass says:

          You can try adding a little bit more flour than water. Sometimes that helps!

  4. LeDell Wingler says:

    What type of container is best to use for the starter? Metal? Plastic? Glass?

    1. Lisa Bass says:

      Glass!

  5. Mike Duran says:

    How big of a glass container do I need to make my starter?

    1. Lisa Bass says:

      A quart sized mason jar is just fine.

  6. Carol Hollins says:

    What size jar works for this?

    1. Lisa Bass says:

      A quart sized jar is good!

  7. Joanne Schultz says:

    5 stars
    Hey Lisa, my husband bought me your book for Christmas and I’m thrilled with it. I’m trying for the first time to make my own SD starter with WW flour. Never did it before. I did steps 1& 2 as you show but it was sooooooo liquidy…. like soup almost. And then it had a funny smell emanating from my glass container when I took the dishtowel off to do Step #3. I’ve made SD bread before but never used WW flour. Most of the recipes I’ve used to ‘feed’ my starter don’t mention so much water to mix with flour. Why 1 cup of WW flour and 1 cup of water (I used Spring water because we have well water and they treat it with chlorine).

    1. Laurie Bellino says:

      I’m trying the sourdough starter for the first time. And I’m curious, what do you do with the discard in the beginning? Throw it out, or is it usable? Right now, I’ve been saving it instead of throwing out but I wasn’t sure what to do with it. It’s not like the discard after the starter is ready to use in recipes.

      1. Lisa Bass says:

        You can use it in discard recipes.

  8. Loren says:

    So I’m on day two. This is my second time trying a starter. I just went ahead and fed it the same amount as I put in yesterday (using 140 g of water and flour instead of cups). I want to use grams but can’t find any recipes with just one flour so I use this recipe and used grams instead of cups.
    Thing is, I didn’t discard.
    Day 1: 140 g water 140 g flour
    Day 2: 140 g water 140 g flour (no discard)
    Should I cut my losses ahead of time and start over, or should this be okay?

    1. Lisa Bass says:

      Just discard half moving forward. It may require feeding it for a few more days.

      1. Robin Taylor says:

        Lisa,
        How should you keep the discard that you want to use in recipes? In another container? In fridge, on counter? Covered?

        1. Lisa Bass says:

          Covered in the fridge.

  9. Anonymous says:

    So I’m on day 4 of my starter I have a cheesecloth cover on it and it is sitting on my counter. People in a sourdough beginner Facebook group are telling me my sourdough does not need oxygen but things I have read say that it does need oxygen that’s how it gets the bacteria to ferment. I’m all confused and worried my starter isn’t going to turn out. I also have a funky cheese smell but chat gpt says that’s normal?

    1. Lisa Bass says:

      Yes, it does need oxygen to ferment! A smell is normal.

  10. Anita says:

    Question for you, approximately how much starter should you have at the end of day 7. I think I have way too much and should have discarded more. I baked a loaf of bread and while it was very good, it was very dense and I’m thinking my starter wasn’t active enough.

    1. Lisa Bass says:

      You should be discarding half every time you feed it. If not, your starter will not be very active.