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Re:Major Rule About Cooking Meat Turns Out to Be Wrong by metabagel on Wednesday July 23, 2025 @06:39PM (#44664773)
The article actually doesn't refute the idea of resting meat to retain the juices. In fact, it supports it. It just provides a reason for why this works which is perhaps different than conventional wisdom.

Retaining the juices in the meat has to do with the temperature at which the meat is cut. Resting allows the temperature to drop, which creates less pressure, so the juices aren't forced out of the meat nearly as strongly.

The title is click-bait. The major rule is correct, not wrong. But, now we know a little bit more about why this rule works.

> As the meat rests (and therefore cools) that vapor pressure decreases, and so does the juice loss. It's not about reabsorption or thickening as the juices cool, which is another common explanation that's been offered over the years. It's simply about pressure. Control for final internal temperature, and—rested or not—the juice loss is the same.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by chasebank on Wednesday July 23, 2025 @07:27PM (#44665139)
"Resting allows the temperature to drop, which creates less pressure, so the juices aren't forced out of the meat nearly as strongly."

I was always under the impression that if you pull your meat at let's say 128, resting it will bring the internal temperature up, finishing at like 132-134. Is this wrong?

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by twelvechairs on Wednesday July 23, 2025 @07:37PM (#44665234)
Overall the steak is cooling (as the outside air is cooler). At the centre of the steak the temperature will go up first (as heat from the outside of the steak which has been in contact with the pan transfers in) then down again.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by NamTaf on Wednesday July 23, 2025 @08:27PM (#44665558)
Unless I’m mistaken (and that’s quite possible!), this should be trivial to test. Sous vide some meat for an overly long time to a precise temperature, then cut each piece at set intervals.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by Konnstann on Wednesday July 23, 2025 @09:28PM (#44665890)
If you sous vide for a long time, the entirety of the steak will be at the same temperature, while pan searing cooks the outside to a higher temperature than the inside, which results in the core temperature going up a few degrees during resting.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by chongli on Wednesday July 23, 2025 @11:10PM (#44666483)
Yes exactly. It all has to do with the thermal conductivity of the meat. Meat tends to be a fairly good insulator which means it takes a long time for heat to conduct through a thick piece of meat (such as a large roast or a pork shoulder). This means that cooking at a temperature above your target internal temp (most conventional cooking methods, not sous vide) will produce a fairly steep thermal gradient between the outside of the meat and the core. Resting the meat allows heat to flow down the gradient to bring the overall temperature closer towards equilibrium.

Another important effect during cooking is the breakdown of collagen fibres (present in tough connective tissues which make some cuts of meat very tough to chew). This occurs in the presence of moisture at temperatures above 170F. When collagen breaks down the meat tenderizes and the collagen itself turns into gelatine which absorbs moisture and retains it within the meat. A gelatine-rich cut of slow-cooked meat (such as oxtail) can be very sticky and packed with flavour. This is one case where food can taste juicier with longer cooking times.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by righthand on Thursday July 24, 2025 @12:33AM (#44666953)
This is not a very quick test because you can hold sous vide food up to 4 hours at the target temp. So you will need to account for that 4 hour gap in all the testing before it starts to break down.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by bmurphy1976 on Wednesday July 23, 2025 @07:35PM (#44665215)
It's not wrong, it's incomplete. It will briefly bring the temperature up as everything stabilizes but then it will start going back down. How quickly is entirely dependent on the environment it's in as well. Keep it in a warming oven? It's gonna a be a much slower process than sitting on a cool countertop.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by bookofjoe on Wednesday July 23, 2025 @09:07PM (#44665783)
"It's not even wrong." — Wolfgang Pauli
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by fsckboy on Wednesday July 23, 2025 @11:53PM (#44666734)
"It's not evenly cooked." -- Wolfgang Puck
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by ketzo on Wednesday July 23, 2025 @07:33PM (#44665200)
That is indeed exactly what the article says — I’m not certain GP is right on this.

Kenji’s original tests seem to confound this as well: every 2.5min of slicing produces steadily less juice, despite the fact that the steak’s internal temp should be rising for some of that time.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by nerdsniper on Wednesday July 23, 2025 @08:21PM (#44665523)
“Internal” temperatures are measured near a single point. Some internal, watery, parts will be hotter than other internal, watery, parts. On average, the temperature goes down over time even if it increases in some local parts.

So the average pressure will decrease.

(Yes, for an ideal cavity, pressure is equal everywhere, but for meat which contains highly tortured paths and a three-phase state mixture for the vapors to escape from - there can be different pressures in different areas especially once there’s any flow at all)

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by gerdesj on Wednesday July 23, 2025 @08:54PM (#44665708)
"I was always under the impression that if you pull your meat at let's say 128"

Please state units. In en_GB (at least) "pulling your meat" is ... ambiguous.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by fsckboy on Wednesday July 23, 2025 @11:56PM (#44666746)
ambiguous? I'll take the compliment, but there is no "us"
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by DrewADesign on Wednesday July 23, 2025 @09:09PM (#44665792)
In steak/chop sized pieces, carry-over cooking of the center finishes very quickly. If you get a really fast probe thermometer like a thermapen, you can watch it in real time. The entire piece will have cooled sufficiently after common resting times (e.g. 10 minutes.)
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by phs318u on Wednesday July 23, 2025 @09:15PM (#44665830)
Off topic, and please forgive the way my mind works, but having read your comment I couldn't help thinking that the interpretive ambiguity would be resolved if the unit stated was "pulls" per minute (128 ppm while vigorous, is still plausible).
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by chasebank on Wednesday July 23, 2025 @11:17PM (#44666517)
Wow. Now I have to go back and watch Silicon Valley season 1. Thanks for the reminder.

https://www.youtube.com/watch?v=vxsPLXX1QLI

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by gerdesj on Thursday July 24, 2025 @08:31PM (#44678044)
"128 ppm while vigorous, is still plausible"

That's ~2.1Hz - Pretty normal. Perhaps get some soothing balm on hand, just in case 8)

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by gosub100 on Thursday July 24, 2025 @04:31PM (#44675734)
what if I am feeding the geese? how do I disambiguate that one?
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by 0x457 on Wednesday July 23, 2025 @09:12PM (#44665811)
Well, yes, as soon as you take meat off the heat, temperature continues to raise for some time, but it starts dropping off during the rest period.

I cook til 125F, take it off, let it rest, cut. I have a probe that measures it in multiple points, allowing it to more accurately estimate core and surface temperature.

There are so many cases like this in cooking because no one bothered to actually test validate science as long as it produced claimed results (i.e. juicy steak in this case)

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by linsomniac on Wednesday July 23, 2025 @09:50PM (#44666031)
Note the article explained: "leading to an overall cooling even as the center warmed", that's what I think you are missing above. If the internal temp comes up to 132, but the exterior drops to 95...
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by x2tyfi on Wednesday July 23, 2025 @08:00PM (#44665405)
This is a good point, and highlights that there’s an additional variable somewhat out of scope from this test.

1. finish temperature (as mentioned in this article) 2. peak temperature

In these tests, the finish temperature and peak temperature were the same - he sliced while carryover cooking was still climbing. However, when resting, most people achieve a peak temperature (due to carryover cooking), then roll down the other side of the curve to a lowered temperature.

As you imply, a longer rest - in conjunction with protein pulled at just the right time - can likely result with both the perfect (to taste) peak temperature, and a lower (and more juicy) slicing temperature

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by UncleMeat on Wednesday July 23, 2025 @07:33PM (#44665202)
Resting increases internal temperature. Immediately after you take the meat off the heat it'll have a cooler internal temperature than after five minutes of resting. The crust of the meat is much hotter than the core and heat moves from the outside to the inside during resting.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by x2tyfi on Wednesday July 23, 2025 @08:02PM (#44665413)
This is true. But OPs point - while a bit hidden - is that even more rest will result in the temperature lowering, eventually.

And when you achieve that was-lower-then-higher-but-now-lower-again temperature, it should be more juicy

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by bigbuppo on Wednesday July 23, 2025 @07:42PM (#44665265)
In other words, the real reason to let it rest is to let it finish cooking.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by stevenhuang on Wednesday July 23, 2025 @08:04PM (#44665423)
Unless it's already cooked, and this extra time spent resting will overcook it, resulting in the meat becoming drier, however imperceptible.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by p1necone on Wednesday July 23, 2025 @11:16PM (#44666514)
If perfect doneness requires immediate consumption as soon as it leaves the pan I'd argue you've still overcooked it, unless you're fine with only ever being able to reproduce your dish alone, just for you.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by woooooo on Wednesday July 23, 2025 @07:02PM (#44664949)
Wouldn't thickening of juices also be temperature- rather than time-dependent? Fats and collagens melt at specific temperatures.

I always thought the whole point of resting is to do with temperature rather than time.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by IsopropylMalbec on Wednesday July 23, 2025 @07:00PM (#44664930)
Does this mean that cooking at lower temperatures will lead to lower pressure and less moisture loss?
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by pdq on Wednesday July 23, 2025 @07:03PM (#44664957)
Yes. Kenji Lopez has done this experiment using sous vide cooking.

See the chart halfway down here:

https://blog.thermoworks.com/coming-heat-effects-muscle-fibe...

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by ars on Wednesday July 23, 2025 @07:18PM (#44665065)
It has nothing to do with vapor pressure, rather the liquid congeals when it cools and doesn't run out.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by flaminHotSpeedo on Wednesday July 23, 2025 @09:05PM (#44665770)
The article categorically refutes the idea that resting is important for juiciness but that's not the same as saying resting will not improve juice retention. Proof that a relationship once though to be causal is not is a pretty big deal, and the conventional wisdom is wrong.

As a counterexample: let's say the only things I care about are juiciness of the center of the cut of meat and the time it takes me to make it. By the conventional wisdom I'd have to rest the meat, adding time, but now we know that I could simply keep cooking the meat for longer, since that will raise the center temp faster, and then cut it immediately after cooking.

Or another scenario: if I know the precise internal temperature for my preferred level of juiciness, I know exactly what temperature to set a sous vide to.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by Dylan16807 on Wednesday July 23, 2025 @10:21PM (#44666208)
Someone that only cares about juiciness at the center, and doesn't care how much is lost from the rest of the meat, sounds pretty unrealistic to me. If you keep pouring in heat until the last moment everything outside the center will be much hotter and lose much more juice.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by flaminHotSpeedo on Wednesday July 23, 2025 @10:37PM (#44666301)
That depends on the heat applied. Which brings up another good counterexample: knowing this, someone could cook longer at a lower temp to get a juicer edge for the same juiciness center.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by Dylan16807 on Wednesday July 23, 2025 @11:11PM (#44666489)
I'm talking about the method in that example, which was cooking as fast as possible.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by flaminHotSpeedo on Thursday July 24, 2025 @07:03AM (#44669277)
Yes, my example is unrealistic when you apply your own unrealistic constraints on top of it.

But when you remove your unrealistic constraints, it is absolutely realistic. There is a wide temperature band where a cut of meat will reach a given center temp faster than carryover cooking with a difference to edge temperature that is trivial enough that someone is unlikely to notice.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by Dylan16807 on Thursday July 24, 2025 @03:11PM (#44674807)
It was your example, I was just trying to stick within it. I'm not intentionally adding constraints "on top". I'm just saying that "cook longer" is outside the scope of my response.

I disagree that the edge temperature difference would be trivial. The difference between the last 20 degrees in the middle coming out of the edges while they also lose heat to their surroundings versus making the edges even hotter as you continue cooking is quite a lot.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by flaminHotSpeedo on Thursday July 24, 2025 @03:43PM (#44675147)
"cook longer" at the same temperature is my original example (though admittedly I was thinking that cook temp would be another variable, but I didn't write that):

> now we know that I could simply keep cooking the meat for longer

Cooking longer at the same temperature is also pretty much exactly what the experiment in the article was, which found no statistically significant correlation between testing and juiciness.

The experimental group pork chops took less time from when they were put on the skillet to when they were cut (and when they would have been consumed if they were cooked by someone making a meal for themselves).

You're welcome to disagree, but the facts disagree with your stance.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by Dylan16807 on Thursday July 24, 2025 @03:58PM (#44675311)
I worded that badly.

I meant cooking significantly longer is outside the scope, since that implies different temperature (or a rubber brick).

Yes, cooking different times at the same temperature is exactly what I was responding to. The outside will be a lot hotter if you do that.

If the juice loss is the same, there's a missing factor here, why does only the middle temperature matter and not the edge temperature?

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by tawktiem on Thursday July 24, 2025 @10:26AM (#44671128)
So like, resting?
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by hug on Wednesday July 23, 2025 @10:44PM (#44666348)
There are many ways to cook a steak, and what you say doesn’t hold true for the way I cook it, which is a reverse sear, and in fact the Serious Eats article even mentions that a rest is unnecessary: https://www.seriouseats.com/reverse-seared-steak-recipe

Sous vide steak, as mentioned by your parent post, is similar.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by ezoe on Wednesday July 23, 2025 @11:44PM (#44666683)
The article conduct rested vs not rested test and testers are inconsistent on which is juicier.
Re:Major Rule About Cooking Meat Turns Out to Be Wrong by safety1st on Thursday July 24, 2025 @04:29AM (#44668385)
That's an inaccurate and unnecessarily critical take on the article.

First, at the end of the article he does a taste test. In the taste test no one was able to tell whether the meat had been rested or not, so that's a reason you might not want to bother resting meat.

Second, yes he devotes a lot of the article to the discovery that juice retention is happening for different reasons than we thought. To quote him directly, he thinks this is important because "Food and recipe writers like myself have been dispensing inaccurate meat-resting time and temperature guidance for ages." If you choose to continue resting your meat, as many will, these insights provide you with better guidance in terms of how you should do it.

As a home cook, the taste test is convincing enough to me that if I'm making food for myself, I should probably skip the resting stage, focus on other taste factors, and see how it goes, as I'm always happy to save 10 minutes and taste is rather subjective anyway. A professional or commercial chef will likely have a very different but no less useful takeaway from this article.

All this to say, it was a great article and the headline's not clickbait.

Re:Major Rule About Cooking Meat Turns Out to Be Wrong by Funes- on Thursday July 24, 2025 @05:59AM (#44668920)
>The title is click-bait.

Click-bait!? On HN's frontpage? Oh, say it ain't so!