re: Brisket finished too early, what are my options?

For someone who supposedly has taken engineering classes, your posts are simply dumb as frick. An insulated ice chest is great, reducing the air space in said container is even better. It's the same concept as pre-cooling an ice chest when you want to store ice for a long time.

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Try to follow the science here...

An ice chest is an insulated box with a controlled environment. You are NOT introducing new air, or hot air, or cold air. The air in there is the air in there.

If you fill an insulated ice chest up with air that is 100 degrees, and close the lid, the air inside the ice chest is 100 degrees. Assume the air outside is less than 100 degrees.

Now if you open the lid 5 hours later, the air inside is now less than 100 degrees. Why? Because the heat transfer from the temperature inside the ice chest to the temperature of the environment outside the ice chest. But since the ice chest is insulated, the heat transfer took a long time and the environment inside the ice chest stayed warmer for a good length of time.

If you fill an ice chest up with ice, eventually, it will melt, right? Why? Because the heat transfer from the air outside and the cold air inside.

So if you put a hot brisket inside the ice chest, the brisket is going to heat the environment of the ice chest. Heat transfer will occur and heat from the brisket will warm the ice chest air. At some point, the environmental temperature inside the ice chest will even out. Meaning, the air inside the ice chest will NOT get any hotter. (This is when heat transfer from the environmental air outside of the ice chest will start to factor)

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Jesus, you post the science and still get it wrong A blanket is an insulating material no matter how much you want to ignore that, plus the volume it occupies changes the heat transfer calculations.

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So if your goal is to keep a brisket inside an ice chest hot for longer than say 1 hour, let the ice chest's insulation work, not a freakin towel.

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Why not both though? The towel absolutely serves a purpose. For some reason you decided to be a fricking titty baby about a towel and you've decided to die on this hill. No one gives a frick about your pseudo intellectual take on this because you took some classes in college that you clearly didn't learn shite from.