Stockgare (Extended Cold Bulk) – Sourdough Technique

How to use a stockgare (extended cold bulk fermentation) to deepen flavor, improve crumb and schedule baking. Practical, science-backed guidance for home bakers.

Why This Technique?

An extended cold bulk (stockgare) slows fermentation to build complex acidity and aroma while improving dough handling and final crumb.

Stockgare extends the bulk fermentation in the fridge (typically 12–72 hours). Cold temperatures slow yeast activity more than bacterial activity, promoting acid development and enzymatic breakdown of starches and proteins. This deepens flavor, improves crust color and can strengthen gas retention by allowing a more gradual gluten relaxation and re-tightening cycle [1][2].

✓ Deeper, more complex sour flavor without overproofing during final proof ✓ More flexible bake scheduling — fits into busy days ✓ Often produces a more open, better-preserved crumb in high-hydration doughs ✓ Reduces need for many stretch-and-fold sets in warm environments

When to Use

✓ Suitable for:

  • • When you want more sour and aromatic complexity
  • • Bakeries or schedules that require flexibility
  • • High-hydration wheat loaves where slow fermentation improves crumb
  • • Shaping the day before baking to fit morning oven time

✗ Not suitable for:

  • • Very short scheduling windows → Stockgare requires significant fridge time
  • • Pure rye loaves aiming for light acidity → Rye benefits from different handling and can become overly acidified

Step by Step

Preparation:

Weigh all ingredients on a [kitchen scale](https://amzn.to/4pUMVHi). Mix in a [large mixing bowl](https://amzn.to/45rc1Gk) for initial development. Use a [dough scraper](https://amzn.to/3LR1f5E) to handle sticky dough. Keep a [glass jar for starter](https://amzn.to/4pWAN8D) handy for feeding reference starters.

1

Prepare dough: mix flour, water, starter and salt. Hydration and levain percentage determine speed — lower temperature or lower levain slows fermentation.

👀 Shaggy mass, hydrated but not smooth
2

Perform 1–3 sets of stretch-and-fold during the first 60–90 minutes at room temperature to build initial strength [1].

👀 Dough gains structure and ribbons
3

Allow dough to rest until it shows modest bulk increase (20–40% volume) and then place covered container in fridge to begin stockgare. Use a clear container to monitor rise without opening [2].

👀 Slow, steady rise in the refrigerator
4

Cold bulk continues in fridge for 12–72 hours depending on temperature, levain and desired acidity. Check dough at intervals rather than constantly; use an instant-read thermometer if needed to confirm fridge temperature.

👀 Dough feels cooler, slightly domed
5

When ready to shape, remove dough and let it warm for 30–90 minutes until slightly relaxed and workable. Shape and place in a banneton proofing basket or container for final proof (cold proof or short warm proof depending on schedule).

👀 Tight, shaped loaf ready for final proof
6

Score and bake in a preheated Dutch oven or cast iron pot or cloche to trap steam for the first 15–25 minutes.

👀 Strong oven spring and well-browned crust

🎬 Video Tutorial

Stockgare: Extended Cold Bulk Demonstration 📺 Sourdough Lab ⏱️ 10:12

Walk-through of planning and executing a stockgare for sourdough loaves.

How Often?

One continuous cold bulk in the refrigerator; duration varies with desired flavor and dough variables.

0–90 min (room temp)
Set Mix + 1–3 stretch-and-folds
12–72 hours (cold bulk)
Set Stockgare in refrigerator
30–90 min (warm-up)
Set Warm dough before shaping
Final proof (cold or short warm)
Set 30 min–3 hours depending on temperature

How do I know it's enough?

Dough shows gentle rise, a smoother surface, and when pinching the dough you feel elasticity and slight resistance; scent becomes pleasantly tangy. Avoid a dough that becomes flat and very acidic—this indicates over-retardation [1][2].

Common Mistakes

❌ Putting the dough in fridge too early

Problem: Insufficient gluten structure leads to weak gas retention and dense crumb

Solution: Build initial strength with a few stretch-and-folds and small bulk increase at room temp before cooling

❌ Over-retarding for too long at very cold temps

Problem: Excessive acidification can weaken gluten and produce off flavors

Solution: Test one loaf at different times (12, 24, 48 hours) to map your recipe behavior; adjust levain percentage or fridge temp accordingly [1]

❌ Constantly opening fridge to check

Problem: Temperature fluctuations disturb predictable fermentation

Solution: Use a transparent container and check visually through the lid; rely on scheduled checks rather than frequent openings [2]

❌ Shaping immediately from very cold dough

Problem: Cold dough tears and resists shaping, reducing oven spring

Solution: Allow a 30–90 minute warm-up at room temperature until dough is slightly pliable

Alternative Techniques

Retard Final Proof

When you want cold-proofed shape control and minimal time in fridge

Short Cold Bulk + Long Warm Bulk

When you want some cold development but stronger enzymatic activity at warm temps

Coil Fold

For very wet doughs that need gentle handling before cold bulk

Sources

  1. [1]
    The Perfect Loaf – The Perfect Loaf – Link
  2. [2]
    Plötzblog – Plötzblog – Link