Old bread isn’t automatically bad; it’s simply changing. As it loses moisture and turns firm, it’s going through a natural staling process that doesn’t make it unsafe. In this state, it can actually become more useful. Stale slices hold their shape better in dishes like French toast, stuffing, panzanella, and bread pudding, where sturdiness is essential. Toasting or briefly reheating in the oven can restore some appeal, and turning it into breadcrumbs, croutons, or soup thickeners helps you stretch ingredients while cutting waste.

The true red line is mold. Any sign of green, black, or fuzzy growth means the whole loaf is compromised, even if only one corner looks affected. Mold’s microscopic roots spread invisibly through bread, and simply cutting off the visible patch doesn’t make it safe. Eating moldy bread can trigger allergies or expose you to mycotoxins. Respect the difference: stale bread is a resource; moldy bread belongs in the bin.