Push the food into a ring

Because the middle is the last place the heat can reach, the people here say, and the ring removes it. Seven separate conversations shape leftovers into a ring with the centre scooped out and say the plate heats faster and evenly; two more conversations describe the same shape independently, and one account lists bread, pizza and rice as where it helped most. Two conversations give the reason: heat enters from the outside of the food inward, and a ring has two outsides, so nothing is more than a rim’s width from an edge. One correction adds the number: the waves only penetrate a centimetre or two, so a thick mound is heated at its heart by conduction from the outside, which is slow, while the outside sits in the field the whole time and overcooks — which is also why one account’s nachos come out with a burnt outer ring and barely melted cheese inside. One objection says the tip is obvious, since there is no middle if you remove it; the answer given is the standing-wave one: the centre of the turntable is a stationary point that never passes through different energy zones, so it heats worst. Another objection says the trick fails when the plate is full, and the account who raised it admits they drop the power and add time instead, which is the other route. One caution and five separate conversations mark the limit: it does not work for soup or anything liquid, because a liquid is already uniform — stir those, and read the water line above.

Yes, three conversations say, and two more say it depends on your oven — and one correction explains both. Three separate conversations set the plate toward the rim of the turntable instead of dead centre, and two say small items belong on the outer ring; six single accounts describe the same move in their own words. The reason the accounts give is that a microwave has fixed hot and cold spots — standing waves — and the turntable’s job is to carry the food through them; a piece of food sitting on the exact axis of rotation goes round in place and never leaves its spot, so if that spot is cold, the middle stays cold. The exchange, two accounts to one in one conversation, is whether the centre is always the worst seat; the correction that decides it, rated high in the cautions, is that the positions of the hot and cold spots depend on the oven’s cavity and how it was built, not on its geometric centre, so the centre is bad in some ovens and fine in others — and one account points out that unless the plate is very large or the food very small, some part of it crosses the axis anyway. Two conversations say the tips vary by model, and one says the claim that waves bounce harder at the edges is simply wrong. So the accounts’ practical answer is to learn your own oven: one account maps its hot spots by heating something uniform — a hot dog, egg white, a layer of cheese — and seeing where it burns or sets first, and another measured the spacing of melted patches in chocolate or marshmallows with the turntable out. Two housekeeping lines from single accounts: a turntable that is jammed or off its track heats unevenly, and a splattered interior absorbs energy that should be reaching the food, so wipe it. Two accounts in the prevalence notes had always centred their plates and never thought about it.

Both, or either, and the people here argue about which is the lazier. Three separate conversations heat in short intervals — thirty seconds or so — stir, and go again until it is hot through, which is also the Food Standards Agency’s advice for exactly the cold-pocket problem; one account lets the plate stand a minute at the end so the heat evens out, which the agency also names. Eight conversations instead drop the power to somewhere between half and seventy per cent and add time — that method is the spine of the page on this site about leftovers going rubbery, and is carried there. The exchange between the two, in one conversation, runs one account for the low setting against two for full power with frequent stirring; the low-power side says it keeps proteins from turning rubbery, and the stirring side says that on most ovens ‘half power’ is full power switched on and off anyway, so stirring by hand during the off-time achieves the same thing without the wait. One objection answers that stirring cannot reverse a portion already overcooked; the counter is that an ordinary oven cycles its power anyway, so stirring mimics the low setting without the time penalty. Four accounts say the low setting is simply too slow for them; one says stirring some foods makes a mess. One caution: any lower setting means a longer total time to get the same heat in — do not lower the power and keep the old time.

On most ovens, nothing subtle — it switches full power on and off. Two corrections in these conversations, backed by several accounts, say that a ‘50 per cent’ setting on an ordinary microwave is the full beam for half the time; the eight conversations that use the low setting say the reason it heats more evenly is the pauses, during which heat spreads from the hot spots into the cold ones before more arrives. Two further corrections and three conversations say this is not true of every oven: models with an inverter — and, one account says, a minority of others — do turn the output down continuously, and softening butter or ice cream is where people notice the difference. One exchange, two accounts to one, is whether cheap ovens heat worse than dear ones or just slower; the accounts settle on the technology mattering more than the price, and this page names no maker. Two more corrections tidy the folk physics that came up: microwaves do not cook from the inside out, and they do not work by resonating with water — the field twists the water molecules back and forth and the motion is the heat. One account says the turntable is not the only moving part in some ovens: a rotating antenna shifts the hot spots instead, which is why placement advice may not apply to yours. And one account calls a maker’s claim of an ‘efficient magnetron’ that ends hot and cold spots marketing, since the spots come from the cavity, not the tube. One account uses the defrost setting for the lunch they forgot in the freezer, which is a different page; five accounts enjoyed the conversation that used melted chocolate to measure the speed of light.

Steaming hot all the way through, the Food Standards Agency says — not warm — and if the middle is not, it is not done. Two conversations add a warning about the plate rather than the food: if the dish comes out much hotter than what is on it, or a mug develops fine cracks over time, the dish is either not microwave-safe or is holding water in its structure, and it will keep stealing the heat. One caution says square plates can jam against the walls and stop turning. What the accounts did not provide, and the page names as gaps: how to form the ring for foods that will not hold a shape, what to do in an oven with no turntable — one account stands the plate on a small turning tray, carried as one account’s idea — and which power setting suits which food. Two gaps in these conversations are answered above by the regulators rather than by the accounts, and the page marks them as its own lines: what to do about water that may have superheated, and how to tell food is safe after uneven heating. Pizza is not this page’s — one exchange here runs three accounts to none for the oven over the microwave for crust — and neither is dry, rubbery reheating or rice; the leftovers page carries all three.