Originally posted by K Kruger:
A bimetal therm uses the relationship of two metals that expand at different rates as they warm and cool. Its reading is actually an average of temps from the tip of the therm to a point 2-3" up the probe (depending on the therm). Thus, it shouldn't be used for thin items (and is why it needs to be used from the side; a point 1-1.5" from the tip needs to be the point that hits the center). Indeed, a thermocouple or thermistor is better--and faster--for food.
So... tell me something I don't already know...
just kidding of course. Is there anything you don't know? I was going to throw out some old engineering calculus problems, but I don't remember anything about it and I'm sure you'd know the answer anyhow.
OK, back to the point of the original question, now that I've digressed significantly... I think the key - and I mean the ONLY key to moist brisket is to, simply, not over cook it. Problem is, that just isn't simple with brisket. Adding liquid to the foil doesn't help with moistness. It can be great to do (I do it sometimes) because it adds some liquid that you can later use in a sauce for the brisket, but the brisket itself... and by that I mean the internal moisture of the brisket simply requires it to not be overcooked, since brisket doesn't absorb any added liquid (though it can mask a lack of moisture, just like sauce can).
I like to think of cooking the perfect brisket as two trains heading toward eachother on different tracks (I'm remembering an algebra question right now). On one track is moisture. On the other is tenderness. You lose moisture the longer you cook. You could pull your brisket at 170 and it would be incredibly moist. Only problem is that it would be tough as jerky to chew. So... the other train is tenderness. Well, tenderness moves in the opposite direction... the longer you cook it, the more tender it gets (to a point, obviously). So, if you pulled it at 200, it would be really tender. But dry as sand.
So, the key to making great brisket is finding that perfect moment when the two trains intersect - when you get to great tenderness without going past the point of moisture loss. The reason brisket is hard is because that point is pretty short. With pork butts, you could fudge a lot and still end up with a great product. With brisket, its a short window. And, as Kruger mentioned above, if you speed up that cook (speed up those trains) its an even shorter window and thus much harder to get that right intersection.
Most folks think that intersection happens somewhere between 815 and 190. Personally, I find that if I go anywhere above 190, I've already squeezed out the moisture. when that happens, some folks call it "pot roast". It has that kind of stringiness you get when you braise something for ages. The little fibers squeeze out the moisture like a sponge, but the don't reabsorb them... sad little sucker is beyond the point of good brisket, in my opinion. Only sauce can save it...
But, truth be told, it is far more dependent on other conditions - the actual cut of meat - the temperature you cook it at, etc. So, that is why folks have such varying temps they offer for brisket... it really depends on how they personally are cooking it.
Anyhow, since this is an old post, likely no one will read it. Which is probably a good thing since I've been rambling. But, if by chance, some poor soul has actually read this, I hope it helps clarify the moistness in brisket question...
good luck chasing those trains...