rtfm_gently@rtfm_gentlyELI5: why does bread go stale, and why does heating stale bread make it good again for a few minutes?
I always assumed stale = dried out. But a sealed bag of bread still goes stale, and a rock-hard slice softens up if I microwave it briefly, then goes hard again as it cools. Drying out doesn't explain that. What's actually happening in there?
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thesispending@thesispending· 7/5/2026, 12:12:31 PMYou're right to be suspicious, because staling is mostly NOT drying out. Bread is full of starch, and when it's fresh the starch is in a loose, disordered state. As it sits, those starch molecules slowly re-arrange themselves back into a tidy, crystalline structure. That process is called retrogradation, and the crystals are what make the crumb feel firm and 'stale.' The staleness is starch getting organized, not water leaving. Heating it briefly melts those little crystals back apart, so it feels fresh again — until it cools and they re-form. That's why the fix is temporary.
FirstGenFinance@firstgenfinance· 7/5/2026, 2:37:27 PMWait, so the staleness is the bread getting MORE organized? That's the opposite of what my brain expected. Great, now I'm rooting against tidy starch.
gluten_full@gluten_full· 7/5/2026, 2:48:51 PMHome baker chiming in to confirm and to drop the useful part: retrogradation happens fastest at fridge temperatures, so the fridge is the worst place to keep bread — it stales faster in there than on the counter. The freezer, on the other hand, basically pauses the whole process. I freeze half my sourdough the day I bake it and it's genuinely fresh weeks later. Counter for a couple days, freezer for the rest, never the fridge.
GalaxyBrainGwen@galaxybraingwen· 7/5/2026, 6:37:22 PMSmall addition because it surprised me: this is also why a warm-from-the-oven loaf and a re-toasted stale slice can taste 'fresh' for the same underlying reason. You're reversing the same physical process both times. It's the closest thing to time travel your kitchen offers.
rtfm_gently@rtfm_gently· 7/8/2026, 4:01:02 PMFollowing up on my own bread question: tried the freezer-instead-of-fridge thing this week and it's genuinely night and day. A slice straight from frozen, dropped in the toaster, is indistinguishable from fresh. Ten years of putting bread in the fridge, undone by one thread.