Why This Technique?
A controlled slow fermentation in the fridge that improves flavor, strengthens dough slowly, and gives scheduling flexibility.
Cold bulk fermentation (kalte gare) slows yeast activity while allowing enzymatic and bacterial activity to continue. This produces more complex organic acids and extended enzyme breakdown of starches and proteins, enhancing flavor and crumb development without overproofing at room temperature [1]. A slow cold bulk can also strengthen gluten gradually through low-temperature activity and folding, giving a more stable dough for shaping [2].
🛒 Recommended Products
We recommend the following tools for this recipe:
Digital Kitchen Scale
Essential for accurate dough percentages and consistent cold fermentation
Clear Straight-Sided Container (for monitoring rise)
Easy to monitor dough volume during cold bulk
Banneton Proofing Basket
For shaping and supporting dough after cold bulk
Dutch Oven or Cast Iron Pot
Provides steam and high heat retention for baking retarded doughs
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When to Use
✓ Suitable for:
- • When you want more flavor complexity in a 12–72 hour window [1]
- • When you need to pause a schedule (bake next day) for convenience [2]
- • For moderate to high hydration wheat doughs that benefit from slower gluten development [1]
✗ Not suitable for:
- • Pure rye doughs → Rye relies on enzymatic activity and behaves differently; cold proofing can accelerate breakdown and create a sticky mass rather than structure [2]
- • Very weak starters or very cool home fridges → If fermentation is essentially halted, you may get little activity and underproofed dough; adjust by using warmer bulk or shorter cold time [1]
Step by Step
Preparation:
Weigh ingredients precisely on a [kitchen scale](https://amzn.to/4pUMVHi). Use a large mixing bowl like the [LIANYU Large Mixing Bowl](https://amzn.to/45rc1Gk) or mix directly in a [clear straight-sided container](https://amzn.to/3LROhV5) so you can monitor rise. Keep a [dough scraper](https://amzn.to/3LR1f5E) and [dough whisk](https://amzn.to/4qGy5p0) handy.
Mix flour, water, salt and starter to your recipe's hydration and carry out an autolyse if used (20–60 minutes).
Perform your planned set of stretch-and-folds during the first 1–2 hours of bulk at room temperature (use the dough scraper to help handle dough if needed).
When the dough shows early fermentation activity (slight increase, bubbling), transfer it to a lightly oiled clear straight-sided container or bowl, cover, and place in the refrigerator. Temperature should be ~4°C (39°F) if possible.
Cold bulk for the planned time (12–72 hours). During this time, the dough will continue slow fermentation — you may see gradual volume increase and small surface bubbles.
Remove dough from fridge, bench rest 20–60 minutes (depending on dough temperature), then shape and place in a banneton proofing basket for final proof. Score and bake in a preheated Dutch oven or cloche.
🎬 Video Tutorial
Short demo on how to move dough to cold bulk and adjust timing.
Common Mistakes
❌ Placing dough in fridge too early
Problem: If there's no initial gluten development or folding, dough can collapse or remain underdeveloped
Solution: Perform at least one set of folds and wait for early activity before refrigerating [1]
❌ Over-retarding (too long in cold)
Problem: Excessive acidification can weaken gluten and produce overly sour flavor or sticky texture
Solution: Limit to 12–72 hours depending on dough strength and desired sourness; stronger flours tolerate longer retards [2]
❌ Using a fridge that is too cold or uneven
Problem: Very low temperatures can effectively stop fermentation; warm spots can create uneven proofing
Solution: Target ~4°C and use a clear container to monitor rise; consider moving dough to a warmer spot for finishing if needed [1]
❌ Skipping bench rest before shaping
Problem: Cold dough is stiff and can tear when shaped
Solution: Allow a 20–60 minute bench rest to temper dough and relax gluten before shaping [2]