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Sourdough · Fix it
Sourdough sour taste too strong or too weak
Last updated 23 August 2026
Sourness is controlled mainly by fermentation temperature and time. A longer, cooler fermentation, especially a cold retard in the fridge, builds more acidity and a sharper tang, while a shorter, warmer ferment gives a milder, sweeter loaf.
Diagnose it
Which one matches your dough
| Symptom | Likely cause | Fix | Prevention |
|---|---|---|---|
| Too sharp or vinegary | Long, cool fermentation, particularly an extended cold retard | Shorten the retard or bulk time next batch | Keep cold retard within 24 hours for a milder result |
| Barely any tang at all | Fermentation too short or too warm to build acidity | Extend bulk time or add a cold retard | Try a 24 hour fridge retard after shaping |
| Inconsistent sourness batch to batch | Starter maintenance schedule varying | Feed your starter on a consistent schedule | Keep feeding times and ratios the same each time |
| Sour smell but mild taste when baked | Acidity built in the starter but not fully transferred to the dough | Use a higher starter percentage in the formula | Use the Starter Calculator to size your inoculation |
Do this now
Dial your sourdough's tang up or down
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1
Step 1
For a milder next loaf, shorten your bulk ferment and skip or reduce the cold retard, baking closer to same-day.
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2
Step 2
For more tang, extend the cold retard in the fridge to a full 24 to 48 hours after shaping.
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3
Step 3
Consider your starter's own character too. A younger, more frequently fed starter tends to be milder than an older, less frequently fed one.
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4
Step 4
Adjust starter percentage as another lever: a smaller amount of starter means a longer fermentation and typically more sourness.
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5
Step 5
Taste and track what you did each bake, since sourness is genuinely a preference dial you can tune over a few loaves.
Stop it happening again
Fix the cause, not just the bake
Sourness is one of the most controllable variables in sourdough baking once you understand the levers. The Fermentation Calculator helps you plan bulk and cold retard time deliberately, so you're tuning flavour on purpose rather than by accident.
Common questions
FAQ
How do I make my sourdough less sour?
Shorten the fermentation time and reduce or skip the cold retard in the fridge, baking the loaf closer to the same day it's mixed for a milder result.
How do I make my sourdough more sour?
Extend the cold retard after shaping to a full 24 to 48 hours in the fridge. A longer, cooler fermentation reliably builds more acidity and tang.
Does starter age affect sourdough flavour?
Yes, to some extent. A younger or more frequently fed starter tends to produce a milder loaf, while a more mature or less frequently fed starter often gives a sharper tang.
Keep reading
Other pizza and sourdough fixes
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