To start, the brisket I'm working with this go around is an 18.5 pound choice brisket from Sam's Club:
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Next for me comes the most stress part of smoking a brisket and that is the trimming. For me, I go pretty aggressive with the trim to accomplish the following goals:
1. Remove unnecessary fat that will not render down in the smoking process.
2. Create the maximum amount of slice-able brisket
3. Shape the brisket so it cooks more evenly
4. Use every part of the brisket.
For tonight's trim, I removed about 7.5 pounds.
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Don't worry, these trimmings will not go to waste. I already ground or cubed the meaty sections to be used for other dishes later in the week. The fatty pieces are going to be rendered down to make beef tallow.
So this is what the finished trim looks like:
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The main things I did was to slice down the deckle of fat, remove the Mohawk in the back, leave about 1/4 of inch of fat on the back, round the flat section, trim tiny excess fat pieces off the top to have more meat exposed to the rub, and trim the rough parts on the perimeter of the meat.
Now for the rub. It's brisket and the rub is simple: 1 part coarse kosher salt, 1 part course black pepper, and .25 part Lawry's season salt. Apparently pit-masters using Lawry's is the worse kept secret in Texas. For any BBQ rub the spice has to be coarse or granulated because these BBQ cuts are big piece of meat so the spices have to be able to penetrate the meat. And honestly, I am not worried about over salting the brisket. I think we tend to under salt our meat, and that includes non-BBQ cuts. I dry brine the brisket and put it on a cookie sheet on top of wire rack to let the salt do it's thing. Don't forget to do the sides! If possible, I would leave uncovered but my wife prefers I cover it due to sanitary reasons.
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Now the briskets waits until tomorrow morning. I will start the smoker tomorrow at 4 am, put the briskets on at 5 am, and serve at 5:30 pm.