Conservation (storage) and rassissement (staling) are the twin concerns of bread’s life after baking — understanding the science of how bread ages is as important to the baker as understanding how it’s made, because proper storage can extend a loaf’s peak quality from hours to days, while improper storage accelerates degradation dramatically. Staling is not primarily about moisture loss (though that contributes) but about starch retrogradation: the process by which gelatinised starch molecules (softened and swollen during baking) gradually recrystallise over time, returning toward their pre-baking state. This recrystallisation makes the crumb progressively firmer, drier-feeling, and crumbly. Critically, retrogradation occurs fastest at refrigerator temperatures (0-7°C), making the refrigerator the worst place to store bread — bread stales 6 times faster at 4°C than at room temperature. The optimal storage conditions depend on the bread type. Lean breads with thick crusts (baguettes, pain de campagne): store at room temperature in a linen cloth or paper bag that allows some air exchange while slowing moisture loss. Never use plastic, which traps moisture against the crust, softening it and promoting mould. A baguette is at its peak within 4-6 hours; a large pain de campagne peaks at 24 hours and remains good for 5-7 days. Enriched breads (brioche, pain au lait): more moisture-retentive due to fat and sugar, they keep longer naturally (3-4 days at room temperature in a sealed container). For long-term storage, freezing is superior to any other method: freeze bread as quickly as possible after cooling (or after slicing for convenience), wrapped tightly in plastic then foil. Frozen bread retains quality for 2-3 months. Reheat from frozen: whole loaves at 180°C for 15-20 minutes; slices can be toasted directly from frozen. The toasting of stale bread partially reverses retrogradation by re-gelatinising the surface starch — this is why toast from stale bread can taste fresher than the untoasted original.
Staling driven by starch retrogradation, not primarily moisture loss. Refrigeration accelerates staling 6x — worst storage method. Lean breads: linen or paper at room temperature. Enriched breads: sealed container at room temperature. Freezing is the best long-term preservation. Toasting partially reverses staling.
A bread box (huche à pain) with ventilation provides the ideal microclimate for lean breads. Slice bread before freezing for instant individual portions. Stale bread is not waste — it is the foundation of pain perdu, panzanella, breadcrumbs, croûtons, and bread pudding. In France, the phrase ‘du pain rassis’ (stale bread) carries no stigma; it is simply bread in its next form.
Storing bread in the refrigerator, accelerating staling dramatically. Wrapping lean bread in plastic, softening the crust and promoting mould. Storing bread before it has fully cooled (condensation inside the wrapper). Discarding stale bread rather than toasting or repurposing it. Freezing bread in poor wrapping, allowing freezer burn.
Le Goût du Pain (Raymond Calvel)