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Articles · Fermentation 2026-07-29

What a 14-hour cold retard does to bagel flavour

Slowing fermentation overnight is not just a scheduling convenience
E
Emi Taguchi
Founder
2026-07-29
A man carries a large stack of bagels in a bakery setting, showcasing traditional bread display.

At Bold Citadel, every batch of dough goes into the refrigerator the evening before baking and stays there for 14 hours. This is not primarily a scheduling decision, though it does mean the morning bake starts with shaped dough rather than a mixing bowl. The cold retard is a flavour decision.

What fermentation does at low temperature

Yeast activity slows significantly at refrigerator temperatures, typically around 4 to 6 degrees Celsius. The yeast does not stop working, but it works slowly enough that the dough does not overproof overnight. Meanwhile, the enzymatic activity in the dough continues at a relatively normal rate.

Those enzymes break down complex starches and proteins into simpler compounds, including sugars and amino acids. These compounds are the raw material for the Maillard reaction during baking, which produces the brown crust and the complex flavour notes that a fast-fermented dough does not develop. A bagel baked from a same-day dough is technically correct but tastes flatter.

The practical side of a 14-hour retard

The dough is mixed and shaped in the evening, then placed in covered trays in the refrigerator. By 6:00 the following morning, the shaped bagels are ready to boil and bake without any additional proofing time at room temperature. This means the morning process is faster and more predictable than a same-day workflow would be.

The 14-hour figure is not arbitrary. Shorter retards of 8 to 10 hours produce a noticeably less developed flavour. Longer retards beyond 18 hours start to affect the gluten structure in ways that make the dough harder to handle and the crust less even. Fourteen hours is the point where flavour development and dough integrity are both at their best, based on testing done in the first months of the shop.

Why this matters for the customer

The practical result is a bagel that has more to it than just chew and crust. There is a slight tang, a deeper wheat flavour, and a crust that colours more evenly in the oven. These are not dramatic differences, but they are the kind of differences that make a bagel worth eating on its own, without a spread.

Fourteen hours is a long time to wait for bread. The flavour is the reason.

#Fermentation#Cold retard#Baking#Flavour

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