Sourdough

How to Make a Gluten-Free Sourdough Starter from Scratch

Do you dream of baking loaves of fresh homemade sourdough bread… but can’t eat gluten? I’m here to tell you that dreams can come true! Get started on your gluten-free sourdough journey by following these easy step-by-step instructions on how to make your own gluten-free sourdough starter from scratch – using only three ingredients! Keep in mind that the process does take about a week, but is well worth the wait. At the end, you’ll have a living and active homemade gluten-free sourdough starter, ready to use in any gluten-free sourdough recipe you desire.

Before we dive into the process, let’s go over a few fun facts and frequently asked questions. Then at the end of the article, you can tune into a video demonstration if you please! The video shows the process of making our wheat sourdough starter, but the process is essentially the same.


What is Sourdough?


Did you know that homemade “sourdough” isn’t necessarily sour in flavor? Unlike store-bought or quintessential San Francisco sourdough, most homemade sourdough is usually not very sour at all! It is simply called sourdough because of the process it is made – through natural fermentation.

Rather than adding commercial dry yeast, artisan and homemade sourdough bread rely on a sourdough starter culture to provide loftiness and rise. And that is exactly what we’re going to create today! If allowed to ferment for a very long time, your sourdough can become more sour-tasting if that is what you desire.


Why Make Sourdough at Home?


Because it is fun! Duh. 

Also, there are many health benefits of making homemade sourdough bread. The fermentation process helps our bodies maximize nutrient absorption, and also makes the bread easier to digest. So much so, that many people with gluten sensitivities can tolerate homemade (gluten) sourdough with no issues!* I am one of those people. I regularly eat home-baked sourdough made with wheat flour, but cannot stomach other “normal” bread without extreme bloating and discomfort.

*Note: I do not encourage those with celiac disease or extreme gluten allergies to try wheat-based sourdough bread. Yet, if you only have mild sensitivities like myself, you may be interested in trying our classic sourdough starter tutorial and simple sourdough bread recipe. I personally prefer them to gluten-free options, but do what is best for you.

Additionally, homemade sourdough is far less processed than store-bought bread. Especially gluten-free bread, which usually contains a long list of additives. By making your own gluten-free sourdough starter and bread, you have ultimate control over the quality and choice of ingredients. 


What is a Sourdough Starter Exactly? 


A sourdough starter culture is a living thing. The right combination of water, flour, and warmth creates the perfect environment for yeast and beneficial bacteria (lactobacillus) to live and grow. You’ll see that this gluten-free sourdough starter recipe also calls for one organic apple, which helps inoculate the mixture with beneficial bacteria and wild yeasts. Once established, the colony of yeast and bacteria need to be nurtured with routine “feedings” to keep them alive. 

As the yeast and bacteria feed on fresh flour, they convert sugars and starches into acetic acid (which is what makes sourdough slightly sour, healthier, and easier to digest) and also produce carbon dioxide gas. Inside a container, a happily-fed sourdough starter will create air bubbles and grow in size. Then when an active starter is added to the dough of sourdough bread, the starter culture continues to feed and ferment the dough – adding air pockets and rise.


A picture shows a jar of sourdough starter on the left and a loaf of bread that has been cut in half on the right. It  depicts bacteria, yeast, and flour and what those items together provide for a baked loaf of bread which is acid, carbon dioxide and aromas.


Gluten-Free Sourdough Flour Options


When it comes to baking gluten-free sourdough bread, there are dozens of GF flour types to choose from! Millet, potato, rice, buckwheat, tapioca, sorghum… the list goes on. Most gluten-free sourdough bread recipes call for a combination of several types of GF flours, along with the addition of psyllium husk and/or xanthan gum to help everything bind well in the absence of gluten. 

On the other hand, we’re going to keep it really simple for the starter portion! To make a gluten-free sourdough starter, we have found it is best to simply use brown rice flour or buckwheat flour. Or, you can do half and half if you wish! The flavor of buckwheat flour is definitely more pronounced than mild brown rice. We used brown rice for this tutorial. 

Another option is white rice flour. However, whole-grain brown rice flour and buckwheat are more nutritious and wholesome than white rice flour. Once your gluten-free sourdough starter is established, you can play with feeding it a variety of these flours, or even sweet rice flour. Sweet rice flour is less gritty and more sticky than other rice flour, which can help act as a binding agent. Feel free to give any combination of those flours a try, using the same process you’ll learn below! 

Finally, I do not suggest using an all-purpose 1-1 GF flour for this recipe. We tried to make a gluten-free sourdough starter with a 1-1 replacement flour recently. It technically worked – it rose and got active – but the smell was gnarly! I think all the extra additives in 1-1 flour made something “off”, because it smelled like fermenting vomit. 


And now, on with the show!


An image showing a white bowl of flour sitting on top of a kitchen scale that is registering 500 grams in weight. Next  to the bowl and scale is an apple and behind the apple is a glass measuring cup that has 1.5 cups of water in it. In the very back there is a bag of Arrowhead Mills Organic Brown Rice Flour and an empty two liter jar with a snap on lid. These are the ingredients to make your own gluten-free sourdough starter.



GLUTEN-FREE SOURDOUGH STARTER INGREDIENTS & SUPPLIES


  • Brown rice flour or buckwheat flour (or a combo of both). It is best to use organic if possible. Throughout the entire process of making your gluten-free sourdough starter, you’ll use about 750 grams of flour (1.7 pounds) – so keep that in mind when you’re choosing a bag of flour. We like the organic brown rice flour from Arrowhead Mills. This 6-pack of 24-ounce bags on Amazon is a great deal. It will keep your sourdough starter happy and fed for many months! Our sourdough bread recipe (see the recipe for a rustic GF sourdough boule loaf here) also uses a good amount of brown rice flour, so you can use it there as well.

  • One organic apple. Yes, it is essential to get organic! Non-organic produce may not only lack desirable good bacteria, but may have harmful additives that will ruin your starter. We always use a Fuji, Pink Lady, or Gala apple.

  • Un-chlorinated or filtered water. Avoiding chlorinated water is important when it comes to any fermentation process, including making sourdough. We use filtered water. A basic carbon filter is enough to remove most of the chlorine from city tap water. In a pinch, bottled water could be used – though I am not a fan of bottled water for environmental reasons.

  • A large air-tight glass container. We use this 2-liter flip-top container (about a half-gallon). Using too small of a container will limit the space your starter has to rise. The container should be large enough to allow for the flour/water mixture inside to double in size.

  • A kitchen scale. The sourdough world is riddled with recipes that call for flour by weight (including this one), rather than traditional cup measurements. This is because all flours have slightly different weights. For example, this recipe calls for 500 grams of flour to start. 500 grams of Arrowhead Mills brown rice flour equates to 3.25 cups, yet 500 grams of their buckwheat requires a full 4 cups!

  • A mixing bowl

  • Liquid measuring cup

  • A moderately warm location

  • Recommended: an ambient thermometer or sticky strip thermometer




INSTRUCTIONS TO MAKE GLUTEN-FREE SOURDOUGH STARTER


Step 1: Mix Flour, Water, and Grated Apple (Day One)


In a large clean mixing bowl, combine 500 grams of brown rice or buckwheat flour, one grated organic apple, and 360 mL of lukewarm filtered water (about 1.5 cups). Mix thoroughly. The texture should be like thick sloppy dough. Not dry and crumbly, but not soupy wet. 


Quick tips:

  • When you weigh your flour in a bowl, don’t forget to either tare the scale or subtract the weight of the bowl!

  • Wash the apple with water before grating it, but do not use soap or other vegetable wash. We grate the apple with a box-style cheese grater. Add the apple skins along with the flesh, but avoid the core and stem.

  • If your water is really cold, either allow it to sit out and come to room temperature, or stick it in the microwave (in a glass measuring cup) for 15-30 seconds. Cold water will slow the growth of the beneficial microbes.  

  • Throughout this process, if your starter ever seems too dry or far too wet, feel free to add a splash more water or flour until the desired consistency is reached as described. The amounts I am providing are a general guide. Again, different flour types and brands will have slightly varying weights.


Once the apple, flour, and water are thoroughly combined, transfer the mixture into a large glass fermentation vessel. The vessel should be clean. I suggest washing it with hot water and vinegar, but avoid using old sponges and/or soap. Mash down the wet dough to remove any air pockets. If possible, try to avoid getting gunk all over the sides of your container. That stuff may be more likely to mold. Use a silicone spatula to clean up the sides if needed. No need to be perfect however.

Now, either wrap a large rubber band around the container or use a glass pen to mark the level of the mixture on the side of the container. This provides a starting point and allows you to easily monitor your starters’ growth.

Finally, tuck the container in a moderately warm location and let it sit for 72 HOURS. The ideal fermentation temperature is around 70-75°F, or 23 degrees Celsius. Colder temperatures reduce beneficial bacteria growth and also increase the chances of mold. 


A four way image showing the process of mixing the ingredients for a gluten-free sourdough starter. The first image shows a bowl of grated apple being held over a larger bowl of flour with a glass liquid measuring cup of water next to it. The second image shows the ingredients after they have been combined and mixed together in the larger bowl, a wooden spoon is seen partially inserted into the mixture. It was used to combine the ingredients. The third image shows a view through the top of the 2 liter flip top lid jar after the ingredients have been transferred to the jar. The fourth image shows the 2 liter flip top jar from the side, illustrating that the mixture has filled about 40 % of the jar and there is a red line that has been made on the jar to mark where the mixture was filled to.


Ways to keep your sourdough starter warm:


If you’re making a gluten-free sourdough starter during the summertime, you’ll likely have no issue keeping it happy by simply leaving the starter out on the countertop. However, if you attempt to create a starter during the winter (or if your house is otherwise on the cool side) it can be a bit more tricky. If you aren’t exactly sure what the ambient temperature is within microclimates in your house (e.g. in particular rooms, on the counter, etc) it is best to use a thermometer to assess the exact temperature where your starter is stored.

A couple options to provide warmth to a sourdough starter are to keep it near a warm appliance, use an electric heating pad or seedling heat mat nearby, or to wrap the container in classic holiday lights. I emphasize classic lights because newer LED lights do not get warm. These are all tricks we use and suggest for keeping homemade kombucha warm and active too!

Last but not least, our favorite easy way to keep both sourdough starter and the proofing dough warm is to keep it inside the oven – with the oven OFF, but oven light on! It creates the perfect cozy home. It if gets too warm in the oven, keep the door cracked open slightly.


The future sourdough starter is shown in a 2 liter jar after it has fermented slightly. It is resting in an oven with the oven light on to keep it warm but the oven itself isn't turned on or hot. The mixture is much more airy with visible bubbles throughout and it has risen to almost double where it was originally started from.


Step 2: First Discard & Feed (Day Four)


During the last three days, your starter should have started to get active, bubbly, and rise. It may have even risen and then fell back down again. That’s okay, but means it is getting hungry! The starter will also start to smell a little funky, malty, and semi-sweet – reminiscent of apple cider vinegar. 

After 72 hours (about three full days later, but it doesn’t need to be exact) it is time to feed your starter for the first time. The process of feeding a sourdough starter involves first discarding a portion of it, and then adding fresh flour and water. So, any time you hear a reference to “feed” the starter, keep in mind that also means removing some and not simply adding to it.


Feeding the Starter:

  • First, open the lid and stir the starter with a clean utensil. This will knock out the air and bring it back down to its original volume.

  • Next, remove and discard about half of the volume of starter in the container. I usually just eyeball it, using the mark or rubber band line on the container as a guide. Discarded sourdough starter can be composted, fed to chickens, or used to make other sourdough goodies – like gluten-free sourdough crackers with herbs and cheese!

  • Now add an additional 250 grams of fresh brown rice or buckwheat flour and about 180 mL (about 3/4 cup) of lukewarm water to the mix. Stir thoroughly to combine. We simply add them to the starter container and mix it all up.  If your container is tall or difficult to stir in, you can also do this in a separate bowl and then put it back into the container. It should be a slightly thinner consistency than the original mix.

  • Clean up the sides of the container as needed so you can monitor the rise again (and possible fall).


Now, put the container back into a warm location and let it sit for 48 HOURS this time. 


A four way image collage, the first image shows the jar with the risen sourdough mixture. The second image shows the jar after half of the mixture has been discarded. The mixture is now halfway between the red line and the bottom of the jar. The third image shows the jar after flour has been added to the top of the mixture, it has yet to be stirred in and there is a glass liquid measuring cup in the background with water that will need to be added as well. The fourth image shows the jar after the flour and water have been mixed into the remaining mixture.


Troubleshooting notes:

If your starter did not rise at all during these 48 hours, allow it to sit for another day before moving on to the next step. Yet if it rose and fell back down (look for smears on the container) then it is time to feed again. If it is acting particularly lethargic, try feeding with half brown rice flour and half buckwheat. 

Keep in mind that it is common for the first bout of activity to be more vigorous and obvious than the following few. That is because different short-lived bacteria quickly ferment the starter at first. Yet these are not the same type of bacteria and yeast we desire long-term in our starter, who are slower to develop. 


Step 3: Discard & Feed Again (Day Six)


This step is easy! Simply repeat the same discard and feed process that you did previously. Stir it first, discard half, and add more fresh flour and water like we did in the previous step. Yet this time you want to make it a splash more wet than before – like a wet, sloppy dough. Use 250 grams of flour and about 220 mL (just under a cup) of lukewarm water this time. 

Now, let your almost-ready gluten-free sourdough starter sit for 24 HOURS If all goes well, it should rise and fall within this time period. The apples should be pretty much be disintegrated by now too. 


Step 4: Is It Ready? (Day Seven)


The day has come! If your starter has gone through the phases of rising and falling after each feed, you now have a bonafide active gluten-free sourdough starter on your hands! She is ready for baking. But first, you better give your new friend a name. In fact, it is considered bad luck to not name your sourdough starter!


So… What do I do with it now?


Well, you bake with it! Try our rustic gluten-free sourdough boule loaf recipe here.

In the meantime, your new starter needs ongoing care. We find it most simple to store our starter in the refrigerator (which makes it go semi-dormant) and pull it out just on weekends to feed and/or bake with. 

To help you learn how to take care of your starter, I put together this guide all about ongoing sourdough starter care. I originally wrote it for classic wheat sourdough starter, but edited it to include special notes for gluten-free sourdough starters as well! The process is essentially the same.


That article covers:

  • How to routinely feed your sourdough starter – which is a little different than the feeding process we did here to create it.
  • How frequently to feed your sourdough starter.
  • Where to store your starter: in the refrigerator or at room temperature?
  • How to “ready” your sourdough starter for baking, and more!


A gluten-free sourdough loaf of bread sitting atop a wire cooling rack. It has been scored on top in the shape of a square with slice made in the top to resemble that of wheat or grain.
One of our recent gluten-free sourdough bread loaves.



FAQ: What is that dark liquid on the top of my sourdough starter?


When the yeast in a sourdough starter has eaten up all of its available food and is hungry for more, it produces a thin dark layer of liquid on top. This is an indication that your starter is more active than you’re feeding it. It is a naturally-occurring alcohol created by the yeast, called hooch. This is totally normal! Do not freak out.

If your starter does develop hooch, you can either pour it off the top or simply mix it back in, then discard and feed as usual. Ours almost always has a thin layer of hooch developed when we take it out of the fridge for our weekly baking.

However, I have noticed that water has a tendency to separate out from brown rice flour even more readily than wheat flour. For example, sometimes a thin layer of water appears immediately after feeding the gluten-free sourdough starter. That isn’t hooch… That is just water, and you can leave it be.


A 2 liter jar with flip top lid is shown with remaining sourdough starter taking up the bottom 20 % of the jar. It has been taken out of the refrigerator from storage and the top of the starter has developed a layer of hooch on top, meaning it is hungry and ready to be fed.
Our starters always have a layer of hooch developed after sitting in the refrigerator for a week without being fed. This is Gladys saying “Feed me Mom!”


And that is how you make a gluten-free sourdough starter.


So, how’d it go? I hope this article got you one step closer to making all your sourdough dreams come true. Please feel free to ask questions, leave a review, share this article, or just say hi. Thanks for tuning in, and happy baking!


For all you visual learners, here is a quick video showing the process of making our classic wheat sourdough starter. The flour is different and the water amount varies slightly, but otherwise it is essentially the same process! Our gluten-free sourdough starter never gets quite as bubbly as the wheat one.

Check out our YouTube channel for more videos by clicking here!


Print Recipe Pin Recipe
5 from 7 votes

How to Make a Gluten-Free Sourdough Starter From Scratch

Do you dream of baking loaves of fresh homemade sourdough bread… but can’t eat gluten? I’m here to tell you that dreams can come true! Get started on your gluten-free sourdough journey by following these easy step-by-step instructions to make your own gluten-free sourdough starter from scratch – using only three ingredients!
Prep Time30 mins
Fermenting Time7 d
Course: Sourdough
Keyword: Gluten-free baking, Gluten-free bread, Gluten-free sourdough, Gluten-free sourdough starter, Sourdough Starter
Servings: 1 sourdough starter culture
Cost: $20

Equipment

  • Large air-tight glass container (2 liter or half-gallon)
  • Kitchen scale
  • Mixing bowl

Ingredients

  • 750 grams organic brown rice flour (and/or buckwheat flour)
  • 360 mL filtered water, room-temperature
  • 1 large organic apple

Instructions

  • Wash your apple, but avoid using soaps or produce wash. Using a cheese grater, grate the organic apple into semi-fine shreds. Use the skins, but discard the core.
  • Add 500 grams of brown rice or buckwheat flour, the grated apple, and 360 mL of lukewarm un-chlorinated water (about 1.5 cups) to a mixing bowl and thoroughly combine.
  • Transfer the mixture into a large glass airtight container that has enough room for it to at least double in size, minimum. (Ours usually quadruples while fermenting) Pack the mixture down into the bottom of the container. Close the lid.
  • To monitor growth, mark the side of your container with a washable marker or rubber band at the top level of the mixture.
  • Let the mixture sit for 3 days (72 hours) at a temperature of 70-75 degrees F. It should bubble and rise during this time.
  • After approximately 72 hours, thoroughly stir the mixture and then discard half of the amount. Then, thoroughly mix in another 250 grams of flour and 180 mL of tepid filtered water (about 3/4 cup) to the remaining starter mixture. This is called "feeding" the sourdough starter. You can do this either in a separate bowl, and put it back into a now-clean ferment vessel, or like we do, mix it in place.
  • Re-mark the container to note the height of the mixture. Let sit at 70-75 degrees, for 2 days or 48 hours this time.
  • After 48 hours, repeat the same discard and feed process as done previously. Discard half, feed, mix, mark the level, and cover again. This time, make it slightly more wet – using 250 grams of flour and about 220 mL of water.
  • Allow the sourdough starter mixture to sit for a final 24 hours.
  • Once complete, you now have a happy and active gluten-free sourdough starter! Store it in the refrigerator when not in use, taking it out to warm up and be fed weekly. OR if stored at room temperature, feed it daily to keep it alive.

Notes

Troubleshooting tips, if the starter does not regain activity after feeding:
  • If there is no activity, let it sit another day or two.
  • If your starter has risen and fallen, or, if seems to not rise after the first discard and feed, and instead it has a dark liquid formed on top (called hooch), it may actually be overly active and hungry! Stir in a little more flour (and warm water as needed, if it becomes too thick and dry) and let it sit again. Wait a day or two to see if it perks up and begins to rise and bubble.
  • If your home is cold, try to find a warmer spot if possible! We’ve found keeping our starter (and proofing dough) inside the oven with the oven OFF but oven light ON creates a nice warm environment during cooler days. 
  • If the starter doesn’t rise at all after the first discard and feed, try opening the lid of your jar. Cover it with a coffee filter or something else that will prevent fruit flies or other debris from getting inside inside.
  • Ensure that you use an organic apple. 
  • Throughout this process, if your starter ever seems too dry or far too wet, feel free to add a splash more water or flour until the desired consistency is reached as described. The amounts I am providing are a general guide. Different flour types and brands will have slightly varying weights.



DeannaCat signature, keep on growing

26 Comments

  • Betty

    Thank YOU!!
    Super excited to be half way through this process – my question to you is this, if my starter is “done” on Thursday, when can I use it to bake my first loaf?

    Again, thanks again for this beautiful recipe!

    • DeannaCat

      Hi Betty! You can use the starter any time after it is “done” with the initial starting process! Just be sure to feed it and allow it to reach peak activity before adding it to a recipe. Good luck!

  • Sarah Mooney

    5 stars
    quick question about the apple. I have a rye starter perking allow and just did flour and water. is the apple specifically for the GF option or is this your preferred method for all starters? thank you! i cant wait to make some bread!

    • DeannaCat

      Hi Sarah – we include apple in our wheat-based starter instructions too, though I know some folks don’t always include it! You can find our “regular” starter recipe here. The measurements are slightly different. Enjoy!

  • Sarah Farmer

    5 stars
    Thank you for posting this! Quick question – I’ve used brown rice for my sourdough starter. When I go to feed her after 72 hours, should I stick with the brown rice flour ONLY or is it fine to then use buckwheat or a combination? Thank you for the fantastic posts! Learning so much from you 🙂

    • DeannaCat

      Hi Sarah! We honestly haven’t tried mixing up the flours during the very first stages, so I am not 100% sure how it would go. I have heard some bakers suggest to stick with the same type of flour to feed your starter since that is what the bacteria and yeast are used to, be we change up the flour we feed our regular wheat starter quite often – so…. I can’t say one way or another. If you wanted to experiment and have a second large jar on hand, you could take the discarded portion into a jar rather than tossing it during the feeding (creating a second starter), and try feeding one brown rice and the other buckwheat? Let us know how it goes!

  • Emily

    Had my first feed yesterday, and overnight it started bubbling away and growing! Any GF Cracker recipes coming with the discard? I saved the discard in the fridge so I can hopefully repurpose!

    • DeannaCat

      Hi Emily! We are hoping to work on that recipe this weekend! Sorry for the delay. The cracker recipes usually call for a just-discarded starter (still somewhat active) so I am not sure how a week + old discard would perform in the crackers…

      • Chloe

        5 stars
        Hi Deanna, your instructions are awesome – thank you! My starter has doubled in size in the first day. Should I feed it sooner, or still wait 72hrs?? Thanks!

    • Elvira

      Looks wonderful. Been baking sourdough for years, coming across you GF sourdough bread was a pleasant surprise. Have been wanting to make it for a while.
      Will it work with potato flour or tapioca?

      • DeannaCat

        We haven’t tried it! My hunch says potato would be better than tapioca… you may need to adjust the water ratios however, as different flours behave different (and weights change). Let us know how it goes!

    • Arianne Brown

      5 stars
      Loved making my sourdough starter! I made a batch of crackers using your original cracker recipe but I can’t wait to try them now that you have a gf review out too! My first loaf of bread was tasty too. Love all of your recipes!

  • Shirley Hutcheson

    Thank you for the Gluten free starter. I know the bread recipe is coming soon. in this crazy time I want to stock up on what flour etc I will need. Would you share the ingredients you will be using in the Gluten Free Sourdough. BTW my starter is looking good using the Brown Rice Flour.

  • Sheenagh Welling

    I just made my GF starter tonight! Looking forward to seeing it grow and be hungry over the next week! Also looking forward to your gf crackers and gf sourdough recipes!
    Thanks!
    Sheenagh

    • DeannaCat

      It is just there to inoculate the starter with wild yeast and bacteria (since flour can be a bit sterile). We have found this helps “guarantee” success over some recipes that only use flour and water, and may not get active or may mold first. Yes it totally dissolves and is otherwise unnoticeable by the 7th day 🙂 Enjoy!

Leave a Reply

Your email address will not be published. Required fields are marked *