Why Is My Sourdough Bread Gummy? 9 Reasons & Fixes
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You waited.
You watched that beautiful loaf rise.
You pulled it from the oven, admired the crust, and probably took approximately 47 pictures of it.
Then you cut into it…
…and squish.
Instead of that beautiful, open, airy crumb, you're looking at something that feels more like sourdough pudding.
If your sourdough bread is gummy, wet, sticky, or doughy inside, don't panic. Your loaf isn't ruined forever, and you probably don't need to throw your starter out the window.
There are several very common reasons sourdough ends up gummy inside.
Let's figure out which one got you.
1. You Cut Into It Too Soon
This is probably the most painful answer because you've already done all the hard work.
The bread smells incredible.
It's sitting there looking perfect.
And you just want to cut it.
But sourdough continues to set as it cools.
If you slice into a loaf while it's still hot, the crumb can appear wet, sticky, and gummy, even if the loaf was baked properly.
The fix:
Let your loaf cool completely before slicing.
For a typical sourdough boule, at least 1–2 hours is a good starting point. Larger loaves may need even longer.
Yes, waiting is terrible.
No, eating the whole loaf warm with butter is not technically a mistake.
But if you're trying to judge your crumb, wait.
2. Your Bread Simply Wasn't Baked Long Enough
A beautiful brown crust doesn't automatically mean the center is finished.
Sourdough can develop plenty of color on the outside while the interior still needs more time.
If the center of your loaf is consistently gummy, dense, or doughy, underbaking is one of the first things to investigate.
The fix:
Give your loaf more time in the oven.
You can also use an instant-read thermometer to check the center. Many sourdough bakers aim for an internal temperature around 205–210°F (96–99°C).
And don't be afraid of a deeply browned crust.
Sourdough is supposed to look like it has been through something.
3. Your Dough Had Too Much Water
High-hydration sourdough can produce an incredible crumb.
It can also produce an incredible mess.
If you're still getting comfortable with sourdough, jumping straight into extremely wet dough can make fermentation, shaping, and baking much more difficult.
Too much water for the flour you're using can contribute to a loaf that struggles to hold its structure and ends up with a wet-feeling crumb.
The fix:
Try reducing the hydration slightly.
A dough that is a little easier to handle is often a much better place to start than one that requires you to perform sourdough gymnastics every time you touch it.
4. Your Starter Wasn't Strong Enough
This one matters.
Your starter is responsible for providing the fermentation power your dough needs.
If your starter is sluggish, weak, or hasn't been properly activated before baking, your dough may struggle to ferment properly.
And poor fermentation can absolutely contribute to a dense, gummy loaf.
A healthy starter should generally:
- Rise predictably after feeding
- Show plenty of bubbles
- Have a pleasant fermented aroma
- Increase significantly in volume
- Be active when you use it
If your starter barely moves after feeding, your bread may be telling you something.
The starter comes first. The loaf comes second.
5. Your Dough Was Under-Fermented
This is another huge one.
Your dough needs enough time for fermentation to develop structure, flavor, and gas.
If you rush bulk fermentation because you're impatient, hungry, or convinced the dough has "probably had enough," you can end up with a loaf that is dense and gummy inside.
The fix:
Don't rely exclusively on the clock.
Watch your dough.
Look for signs that fermentation is progressing:
- Increased volume
- Bubbles developing
- A lighter, airier texture
- A smoother, more elastic dough
- Visible activity around the edges or underneath
Temperature makes a huge difference too.
A dough fermenting in a cool kitchen may need considerably more time than one sitting somewhere warm.
6. You Over-Fermented the Dough
Yep.
Sourdough can be under-fermented and over-fermented.
Because apparently bread enjoys keeping us humble.
If your dough ferments for too long, its structure can weaken. Instead of holding onto all those beautiful fermentation gases, the dough can become slack and difficult to shape.
The finished loaf may spread rather than rise and have a gummy or dense crumb.
The fix:
Learn to recognize what properly fermented dough looks and feels like in your kitchen.
Your room temperature, flour, starter strength, hydration, and fermentation time all interact.
Sourdough isn't a microwave dinner.
You can't always just press the same button and get the same result.
7. Your Flour Couldn't Handle the Hydration
Not all flour behaves the same way.
Some flours can absorb and hold significantly more water than others.
If you're using a lower-protein flour or switching between brands, the same recipe can suddenly behave very differently.
You may end up with dough that feels much wetter than expected and struggles to develop the structure you need.
The fix:
Pay attention to your flour.
If you're having trouble with very wet dough, try a stronger bread flour or reduce the hydration until you learn how your flour behaves.
Once you understand your flour, everything gets easier.
8. You Didn't Let the Loaf Dry Out Enough During Baking
Sourdough needs more than heat.
It needs enough time for moisture to escape.
A loaf can look beautifully browned on the outside while still holding too much moisture inside.
This is especially common with larger loaves.
The fix:
Don't treat the moment the crust turns brown as the automatic finish line.
If necessary, extend the bake and lower the temperature toward the end to prevent excessive browning while allowing the interior to continue cooking.
A longer bake can make a surprisingly big difference.
9. Your Starter and Fermentation Were Telling You Something
Sometimes gummy sourdough isn't caused by one single mistake.
It's the result of several small things happening at once.
Maybe your starter was a little sluggish.
Maybe your kitchen was cool.
Maybe bulk fermentation needed another hour.
Maybe the dough was slightly too wet.
Maybe you sliced the loaf while it was still warm.
Sourdough is a chain reaction.
Starter → fermentation → shaping → proofing → baking → cooling.
If one part isn't quite right, the final loaf can show you the evidence.
And honestly?
That's one of the best things about sourdough.
Your loaf is constantly giving you clues.
You just have to learn how to read them.
So, Why Is Your Sourdough Bread Gummy?
If your sourdough is wet or gummy inside, start with the simple stuff.
Ask yourself:
- Did I let the loaf cool completely?
- Was it baked long enough?
- Was my starter strong and active?
- Did I give the dough enough time to ferment?
- Did I accidentally over-ferment it?
- Was my dough too wet for the flour I used?
- Am I changing flour brands?
- Was the loaf large enough that it needed more baking time?
You don't need to change ten things at once.
Change one variable, bake again, and pay attention to what happens.
That's how you start understanding your sourdough instead of simply following a recipe and hoping for the best.
And once you get that first loaf with the crisp crust, soft interior, and beautiful open crumb?
You'll understand why we keep doing this.
Even after the occasional sourdough disaster.
Continue Your Sourdough Journey
Want to understand sourdough from starter to finished loaf? Explore our complete collection of guides, tips, and sourdough basics in the Squirrelly Girl Sourdough Academy.
EXPLORE THE SOURDOUGH ACADEMYREADY TO BAKE BETTER SOURDOUGH?
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