Before I could make my buckwheat sourdough bread, I needed a starter — and it had to be gluten-free from the very first feeding. Not “mostly gluten-free.” Not “made from a regular starter but fermented a long time.” Gluten-free from day one, no exceptions.
Even traditional wheat sourdough, fermented the long, slow, artisan way, is not gluten-free — the fermentation process breaks down some of the gluten protein, but it doesn’t eliminate it. If your brain or body reacts to gluten the way mine does, that “some” is still too much.
So I built my own starter using nothing but buckwheat flour and water, start to finish. I followed Good For You Gluten Free’s method almost exactly, subbing buckwheat flour in for the brown rice or sorghum flour in the original. It worked well enough that I haven’t changed much about it since, so here’s the full process, start to finish, the way I actually do it.
What You Need
- A wide-mouth mason jar
- Buckwheat flour
- Filtered water
- A coffee filter and rubber band to cover the jar or another breathable cloth cover (this lets air circulate without letting anything fall in)
- A warm spot in your house (the kitchen is usually a good place, but our house runs cold so my spot is in front of our modem)
Day-by-Day: Building the Starter
Day 1: Add 2 tablespoons of buckwheat flour and 2 tablespoons of filtered water to your clean mason jar. Mix it into a thick but stirrable slurry (it looks like thicker pancake batter to me). Cover the jar with the coffee filter, secure it with the rubber band, and set it somewhere warm.
Days 2–6: Feed your starter twice a day — I did it once when I woke up and again before bed. At each feeding, discard half of what’s in the jar first, then add 2 tablespoons each of fresh buckwheat flour and filtered water. Mix it well, scrape down the sides, cover it back up, and let it sit until the next feeding.
Discarding half at each feeding isn’t strictly required, but it helps the yeast and bacteria develop faster since they’re feeding on new flour without as much competition. I discarded for about the first week, then stopped discarding once the starter was established.
By day three or four, you should start to see some bubbles on the surface and sides, and it will begin to smell distinctly sour. Note, because this is buckwheat based, it will likely not rise between feedings like a traditional starter.
Day 7: By now your starter should be decently bubbly with a tangy, sour smell. If yours isn’t quite there, that’s fine — gluten-free starters can take longer than wheat-based ones (especially depending on the temperature of your house). Just keep feeding it twice a day for a few more days in a warm spot until it’s active.
Is It Ready to Bake With?
Your starter is ready when it’s got a few bubbles and has that tangy, sour smell. If you want to use it in a recipe (like my buckwheat sourdough bread), it works best freshly fed and left at room temperature for about 12 hours first — especially if it’s been in the fridge. A well-fed, room-temperature starter is noticeably more active than one straight out of cold storage.
Maintenance Feeding & Storing Your Starter
If you bake often, keep the starter at room temperature and feed it once a day (discarding or not, your call, once it’s established).
If you’re not baking every week, store it in the fridge instead. This is what I do. The cold slows everything down, so you only need to feed it about once a week — pick a day and put it on your calendar, since a forgotten starter is a hungry starter. When you’re ready to bake again, pull it out 12 to 24 hours ahead of time, feed it, and let it come back to room temperature and get bubbly and smelly before using it.
If you ever see a layer of cloudy liquid sitting on top (bakers call this “hooch”), that just means your starter is hungry. Stir it in and feed it as usual.
Troubleshooting
It’s not developing much: Feed it more often, and make sure it’s somewhere warm — yeast and bacteria are slower in a cold kitchen. Dividing it into two jars can also help it develop faster.
It smells bad, not just sour: A sour, tangy smell is normal and good. A genuinely off or unpleasant smell usually means it needs fresh flour and water, or a cleaner jar.
You see mold: Discard it and start over. If you only see mold on the inside of the jar and not on the starter itself, you can transfer the starter to a clean jar and keep going.
Why I Mention This In My Brain Health Work
Fermented foods and a healthy, diverse gut microbiome are part of the gut-brain axis conversation I have with clients constantly — what’s happening in your gut doesn’t stay in your gut, it shows up in mood, focus, and energy too. A homemade sourdough starter is a small, low-effort way to bring a fermented food into your routine without adding anything inflammatory. It also means I know exactly what’s in my bread, down to the flour and the water, which is worth a lot when you’re managing a gluten reaction that affects your brain.
Ready to Bake?
Once your starter is active, my buckwheat sourdough bread recipe is where I’d start. Real crust, soft crumb, and it’s the loaf I make every week.
If you want to go deeper on how to build more brain-healthy swaps into the recipes you already love, my mini course, How To Make Any Recipe Healthy, is a great next step — self-paced and yours for life.
This post is for educational purposes only and is not intended as medical advice. Please consult your healthcare provider before making changes to your diet, especially if you have celiac disease or another diagnosed condition.
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