Bread

Bread keeps about 5–7 days at room temperature and 3 months in the freezer. The one place it should generally not go is the refrigerator.

Store it in a bread box, a paper bag, or its original packaging at room temperature. Paper keeps a crusty loaf crusty; plastic keeps a soft loaf soft but encourages mold. Choose based on which quality you care about.

The freezer is the right answer for anything you will not finish in a few days. Slice the loaf first, then freeze it in a bag, and take out slices as you need them — they toast perfectly from frozen. A whole loaf thaws well too, wrapped, at room temperature.

Refrigerate bread only if your kitchen is very warm and humid and mold is the greater threat.

Bread fails in two completely separate ways, and confusing them leads to the most common bread storage mistake there is.

Staling is not drying out. It is starch retrogradation — starch molecules that were gelatinized and disordered during baking gradually recrystallizing into an ordered structure, forcing water out of the starch granules and making the crumb firm and crumbly. It is a physical process, not a microbial one.

Critically, retrogradation runs fastest at refrigerator temperatures, around 35–40°F. Bread stored in the fridge goes stale roughly three times faster than bread on the counter. This is the reason the fridge is the wrong place for bread, and it is genuinely counterintuitive.

Freezing, by contrast, is below the range where retrogradation occurs, so it essentially stops the process. That is why the freezer works so well and the fridge does not.

Staling is also partly reversible: heating bread above about 140°F re-gelatinizes the starch, which is why toasting or a few minutes in a warm oven revives a stale loaf.

Mold is the other failure, and it is microbial. Because bread is porous and high in moisture, the USDA advises discarding the entire loaf rather than cutting off a moldy slice — the filaments run invisibly through the crumb well beyond the visible spot.