How to Make Your Sourdough More Sour (Or Less Sour!)
- Jenny Derrickson
- Jul 20
- 4 min read
One of the questions I hear often is:
"How do I make my sourdough taste more sour?"
The answer isn't one magic trick. It's actually a combination of how you care for your starter and how you ferment your dough.
At Bread and More, our sourdough has a much milder flavor than many people expect. That's intentional. I keep Frodough (yes, my starter has a name!) well-fed, healthy, and he lives on my countertop year-round. He almost never goes into the refrigerator unless I'm away on vacation. A happy, consistently fed starter tends to produce bread with a cleaner, milder flavor.
But if you're someone who loves that bold San Francisco-style tang, here are several ways to encourage it.
1. Let Your Starter Mature Past Peak
Most recipes tell you to use your starter at its highest point, just after it has doubled.
If you wait until the starter has peaked and begun to slowly fall, the yeast activity begins slowing while the bacteria continue producing acids. Those extra acids create a tangier loaf.
The tradeoff? Your dough may rise a little slower, so be patient.
2. Extend Your Cold Fermentation
This is probably the easiest way to increase sour flavor.
After shaping your loaf, place it in the refrigerator overnight, or even longer.
Many bakers find that:
12 hours gives a mild tang.
24 hours produces noticeably more flavor.
36-48 hours creates an even stronger sour taste.
As the dough slowly ferments in the cold, acid continues developing, giving your bread a deeper, more complex flavor.
3. Don't Feed Your Starter Quite As Often
A starter that's constantly fed stays very active and balanced.
Allowing it to go a little longer between feedings lets acids accumulate.
Notice I said a little longer.
We're not trying to neglect the starter, we're simply allowing it to become slightly more acidic before refreshing it again.
4. Stir the Hooch Back In
If your starter develops a gray or brown liquid on top (called hooch), that's simply alcohol produced during fermentation.
Many bakers pour it off.
If you're looking for a stronger sour flavor, stir it back into the starter before feeding. It won't instantly create a super sour loaf, but it can contribute to a more acidic starter over time.
If your starter is producing hooch frequently, it's also telling you it's hungry and ready for a feeding.
5. Give Your Starter Plenty of Oxygen
This surprises many people.
Every time you feed your starter, stir it thoroughly. Incorporating oxygen encourages healthy yeast growth and keeps your starter strong enough to support the longer fermentations that develop flavor.
A strong starter isn't just about making bread rise—it also creates better balance between yeast and beneficial bacteria.
Helpful Tool: I use a simple silicone spatula to thoroughly mix my starter after each feeding. It scrapes the sides of the jar clean and makes it easy to incorporate plenty of oxygen.
🛒 Recommended: Silicone Jar Spatula
6. Increase Whole Grain Flour
Whole wheat and rye contain more minerals and nutrients than white flour.
Those extra nutrients encourage the bacteria responsible for producing sour flavors.
Even replacing 10–20% of your bread flour with whole wheat or rye can noticeably change the flavor profile.
Ingredient Recommendation: If you're experimenting with a tangier loaf, try adding a little whole rye flour to your starter feedings. Rye is incredibly active and can really boost fermentation.
🛒 Recommended: Organic Rye Flour
7. Ferment a Little Longer
Longer bulk fermentation gives bacteria more time to produce acids.
The trick is learning your dough.
Stop too early and you'll lose flavor.
Go too long and your dough may become over-fermented.
Look for a dough that's airy, jiggly, and has increased in volume without collapsing.
Helpful Tool: A banneton keeps your dough supported during a long cold proof and helps maintain its shape.
🛒 Recommended: 9-inch Round Banneton Basket
8. Use Slightly Cooler Dough Temperatures
Warmer dough encourages yeast activity and generally produces a milder flavor.
Slightly cooler fermentation slows the yeast while allowing acid-producing bacteria more time to work.
Many artisan bakers intentionally manipulate dough temperature to control flavor.
Helpful Tool: An instant-read thermometer takes the guesswork out of dough temperature. Even a few degrees can change fermentation speed.
🛒 Recommended: Instant Read Digital Thermometer
9. Hydration Matters
A slightly stiffer starter (lower hydration) often encourages more acetic acid production—the acid responsible for the sharper, vinegar-like tang many people associate with classic sourdough.
A liquid starter tends to favor lactic acid, which produces a smoother, yogurt-like sourness.
Both are delicious—they simply taste different.
Helpful Tool: A digital kitchen scale makes it easy to keep your starter hydration consistent. Measuring by weight is one of the biggest improvements you can make in sourdough baking.
🛒 Recommended: Digital Kitchen Scale
So Why Isn't Bread and More's Sourdough Very Sour?
Because that's exactly how I want it.
Frodough lives on my countertop and is fed consistently. I use him while he's active and healthy, and I don't intentionally push him toward higher acidity.
The result is bread with wonderful fermentation, great digestibility, and a subtle sourdough flavor that lets the wheat shine through.
Some customers absolutely love a strong tang.
Others have told me they avoided sourdough for years because they didn't enjoy that intense sour flavor. Then they tried ours and became sourdough fans.
There isn't a "right" amount of sour.
That's one of the beautiful things about sourdough—you can guide the flavor simply by changing how you care for your starter and ferment your dough.
Jenny's Tip 💛
Don't chase sourness at the expense of healthy fermentation.
A strong, active starter will always make better bread than a neglected one. If you want more tang, make small adjustments—like extending your cold proof or using your starter just after peak, rather than starving your starter for days.
Healthy sourdough first. Extra sour second.
About the Baker
Hi, I'm Jenny, the baker behind Bread and More. I run a small microbakery where I bake sourdough breads, bagels, and baked goods for my community.
Here on the blog I share sourdough tips, baking lessons I've learned along the way, and simple guidance to help home bakers feel more confident baking sourdough.
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