Settle an argument for me. I meal prep on Sundays: chicken thighs and pork chops, oven or the grill, portioned into containers for the week. Monday tastes fine. By Wednesday everything has this stale, flat, cardboard taste. Not dry, I've fixed dry. Not spoiled, fridge is cold, food's fine by every safety measure I know. It just tastes... like leftovers. Like the fridge. My wife says I'm imagining it and that "it tastes the same as Monday", and to be fair it LOOKS identical.
I own a circulator (this board's fault, see my sear thread) and I'm wondering if running the whole week's prep through it would fix this, since people here rave about midweek reheats. But before I re-tool my Sundays: is the Wednesday taste a real, known thing with a cause? Or is Wednesday chicken just spiritually sad and I should accept it?
Not imagining it, and I can offer a controlled experiment I ran by accident. My normal routine is thighs cooked and kept in their vacuum bags, reheated in the bag midweek: no stale taste, ever, that's why I rave. But a few weeks back I ran short of bags and portioned one batch into open trays after cooking, same bird, same cook, same fridge. THOSE thighs had exactly the flavor you're describing by Wednesday. Same cook, different storage, different taste. Whatever it is, the bag is blocking it.
BBQ guys know this taste well, we just have a ruder name for it: reheated pulled pork left uncovered used to come back tasting like a gas station roller grill. Vac-sealing the leftovers the same night fixed it almost completely. Weird footnote I've never understood though: reheated HAM never gets it. Smoked a fresh ham and a cured one same weekend once, the cured leftovers tasted right all week, the fresh didn't. No idea why, hoping the chef does.
Sammy R. said:
is the Wednesday taste a real, known thing with a cause?
Real, named, and studied since the 1950s: warmed-over flavor, WOF in the food science literature. The short version of the mechanism: cooking bursts the meat's cells and frees iron from the myoglobin, and that iron catalyses oxidation of the polyunsaturated fats in the cell membranes. Given oxygen and fridge time, that oxidation throws off volatile compounds, hexanal being the famous one, and hexanal reads to the human palate as exactly what you said: cardboard, stale, faintly painty. It starts within hours of cooking, is usually obvious by 24 to 48, and reheating drives the volatiles into your nose, which is why Wednesday lunch announces it. Poultry and pork show it worse than beef because they carry more of those polyunsaturated fats. Your wife isn't wrong that it looks identical, and people genuinely differ in how strongly they taste it, so you can both be right. You're just the one with the sensitive nose.
Mike's ham footnote is the textbook's favorite: the nitrite in a cure binds that free iron, which is why cured meats reheat clean while fresh ones don't. It's one of the oldest clues that iron and oxygen are the villains. And weeknightdad's accidental experiment is the fix demonstrated: keep oxygen away and the chain reaction has nothing to run on. So yes, your circulator solves this, not because the cook is different but because the food lives its whole week vacuum-sealed: cooked, chilled, stored and reheated without ever meeting air. In order of effect: exclude oxygen (the bag), keep portions whole rather than sliced until serving (cut surfaces oxidise fastest), chill quickly, and if some of your prep has to stay trayed, a marinade from the rosemary family genuinely helps, those herbs carry antioxidants that slow the oxidation. The reheating guide covers the temperature-and-time side of bringing bags back; that half of the routine is what keeps the texture right, this thread is the flavor half. None of it changes the safety rules, mind: WOF is a palate problem, not a spoilage signal, and the usual chilling and fridge-life discipline still applies either way.
Converted my Sundays a few weeks ago after my own thread here and can confirm the Thursday thighs taste like Sunday thighs. My husband has stopped calling the circulator "the solution looking for a problem". Mostly.
Two weeks of bagged prep and in-bag reheats: Wednesday chops taste like Monday chops. Told my wife it's called warmed-over flavor and hexanal is the cardboard, and she said "so you were both right", which I'm accepting as total victory. Also bought a ham, because apparently that's the one meat with a built-in cheat code.
