Start by trimming any loose fat and silver skin off of your brisket. Use your knife to round off the corners and remove any uneven sections of meat.
Slather the brisket in yellow mustard as a binder, then season with a base layer of steak seasoning.
In a bowl, combine the coarse pepper and salt and give it a good mix, then use that mixture to add a second layer of seasoning to your brisket.
Let the brisket sit at room temperature while you preheat your smoker or pellet grill to 250°F.
Once your smoker is preheated, place the brisket directly on the grates with the fat cap facing down. *See note below.
Let the brisket smoke for 90 minutes; then spritz it with apple juice every hour until it reaches 175°F internally. The initial smoke should take a total of about 4 hours.
Lay out a sheet of butcher paper that is four times as long as the brisket is wide, then use your apple juice spritz to moisten the paper.
Place your brisket on the butcher paper and wrap it tightly, then return it to the smoker for another 2-3 hours until it reaches an internal temperature of 203°F.
Remove the brisket from the smoker and store it in a dry cooler or Cambro for at least one hour to rest (preferably two hours if you have the time).
Unwrap the brisket, slice, and enjoy!