What You’ll Learn
- Why cold proofing works.
- When to refrigerate.
- How long overnight proofing can last.
- Why cold dough scores well.
- How to avoid overproofing in the fridge.
Quick Answer
To proof sourdough overnight, shape the dough, place it in a floured banneton, cover it and refrigerate. The cold slows fermentation but does not stop it. Most bakers bake directly from the fridge the next day.
This lesson is part of our Baking Bread section: “From mixing your dough to slicing your first loaf.”
Why Proof Overnight?
It separates shaping from baking and makes sourdough fit more easily into real life.
When to Refrigerate
Refrigerate once shaping is complete and the dough has reached the appropriate fermentation stage.
How Cold Should the Fridge Be?
A normal domestic fridge is usually suitable, but warmer fridges allow more fermentation.
How Long?
Overnight is common; longer proofing can work but depends on dough condition and fridge temperature.
Bake Straight From Cold
Cold dough is firm and often easier to score cleanly.
Can It Overproof?
Yes. If bulk fermentation was already advanced, a long cold proof may push it too far.
From Our Workshop
The fridge is one of the best tools for making sourdough manageable around work and family life.
Bake Slower Tip
Keep a simple note of fridge time and loaf result. You will quickly find your preferred window.
Common Mistake
Do not assume the fridge stops fermentation completely.
Today You Learned
- Cold proofing slows fermentation.
- It makes scheduling easier.
- Cold dough scores well.
- Fridge temperature matters.
- Overproofing can still happen.
Frequently Asked Questions
Can I proof for 24 hours?
Sometimes, but dough and fridge conditions matter.
Do I need to warm it before baking?
Usually no.
Should I cover the banneton?
Yes.
Can I freeze during proof?
That is not recommended as a normal proofing method.
Why did it spread after overnight proof?
It may have fermented too far before or during refrigeration.
Tools Mentioned in This Guide
These products are directly related to the baking stage covered in this lesson.
Build a Better Baking Setup
A good banneton and fridge-proofing routine can turn sourdough into a much more flexible process.
Continue Learning
Next lesson: Scoring Sourdough Bread
Use this in your next bake
Use the clock as a reference, not the finish line. Dough temperature, flour and starter strength can move the schedule significantly. Note what the dough looks and feels like at each stage so the next bake becomes easier to judge.