Plateau Explained

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mr mac

Master of the Pit
Original poster
SMF Premier Member
Oct 19, 2009
1,325
522
Doniphan MO
I was talking with Jake yesterday about smoking meats and we got to the subject of the brisket we did on Thanksgiving and the length of time it took, etc. I told him you can expect a brisket to cook at a rate of about 1.5 hours per pound at an average of 230 degrees. He did the math and then asked why it took an extra40 minutes or so to reach our temp. I told him it was the dreaded plateau and that it was not to be feared. The next question was inevitable. That got me to thinking of all the new folks here and that we should probably breach the subject again just so no-one panics and throws coal to the fire.

Simply put, this is the point in time where the majority of heat energy from the burning charcoal/gas or other heat source, is going into the breaking down of fats and connective tissue in the meat. When this happens the internal temperature as read on the remote thermometer will stall for a period of up to several hours depending on the size of the meat being cooked. When the majority of the fats and tissues have been rendered, the meat will resume its climb in internal temperature, and when desired final temp is reached, it can be removed from the smoker.

This is how my father-in-law explained it to me the first time I turned a brisket into a large lump of leather. If anyone else can add to this explanation, by all means, please do!

Mac
 
Well thought i might add a little to this since i did ace high shool physics, although that was a while ago. Anyways i'll give a science ahead warning incase anyone wants to turn back now, if not here goes....

It's a matter of whats called enthaply. Enthalpy is the energy required to cause matter to change phase, such as a solid to a liquid(enthalpy of fusion) or liquid to gas (enthaply of vaporization) or even solid to gas (enthalpy of sublimation) like with dry ice. I'll give a fairly easy example here. H2O can be solid(ice) or liquid(water) or gas(steam). Below 32* you have ice and above you have water, but at that 32* it can be one or the other. This is where the enthalpy comes in. Ice will heat up by gaining energy to 32* but then must gain energy to change from solid to liquid. So if you set out a cup of solid ice it will warm up to 32* and then sit at that temp until all the ice melts then the temp will start to rise again. This happens to pretty much all matter just at different temps.

Something in the meat is going through the same process, probably the connective tissue and fats as Mac stated, so it sits there till it's all melted then the temp starts going up again.

Man i feel like a nerd now.....
 
May I also add that its not just a matter of the size of the piece of meat but also has to do with the amount of fat and connective tissue that is being broken down.
The plateau/stall actually helps the meat become more tender and while aggravating at times should be looked at as a good thing. Don't change the heat and just ride it out it will begin to rise again
 
So connective tissue is mainly collagen and when it is breaking down it becomes gelatin and gelatin retains moisture and thats a good thing. And we all know fat and happy go together, so maybe a plateau isnt such a bad thing.
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And thanks to ocsnapper for the points!!
 
Do any of you learned gentlemen know why, sometimes but not always, I have found, if you take a particular piece of stalled meat out of the smoker, smack it around a bit ( give it a good jarring ) then put it back in the smoker it will shake it out of its stupor and the temp will again begin to rise. That is a tip I picked up from the chat room.

I also wonder if this sort of false start to the temperature rise may just not be good for the final tenderness of the meat?

This method has only worked about 1/2 the time for me to accelerate a stall and not worked the other 1/2 of the times. Or I may have just fooled myself because it was about to end the stall anyway.

Any ideas on the science involved in this??

I don't like to do it but sometimes time becomes a factor like when guests are getting fidgity and eyeing the door.

Sometimes I do it of course because I am so darn hungry by then I'm ready to eat the doorknobs.
 
LOL Gnubee. I heard a baseball bat works good too....

This is an excellent posts, because we never hear any new members ask questions about plateauing until they mention it in a qview thread.

Nominate for a sticky...
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Great post - I now have installed a mallet next to my smoker
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I've solved that by.... starting butts & briskets earlier, to allow for plateau time. You lose virtually nothing by having them ready ahead of time, but if you're behind schedule those fidgety guests get VERY annoying.
 
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