What size brisket should I buy?
For most families, a 12 to 15 pound whole packer brisket is the sweet spot. You will lose weight to trimming and rendering, so plan on about 1/2 pound cooked brisket per person (more if you want generous leftovers).
Do I cook brisket fat side up or down on a Traeger?
I go fat side down on most pellet grills because the heat often comes from below. The fat can act like a little heat shield for the flat. If your particular setup runs hotter from above, flip that logic. The real rule is: protect the flat.
What internal temperature is brisket done?
Use temperature as a guide, not a finish line. Brisket is usually ready to come off around 200 to 205°F, but the true test is feel. A probe should slide into the flat with almost no resistance, like room-temperature butter.
What is the stall and do I have to wrap?
The stall is when evaporation cools the meat and the temperature seems stuck, often around 150 to 170°F. You do not have to wrap, but wrapping in butcher paper or foil helps you push through it, keeps the flat from drying out, and gets dinner on the table before everyone starts snacking on chips like it is their job.
Butcher paper or foil?
Butcher paper: best bark and a more traditional texture.
Foil: fastest and juiciest, but bark can soften more.
I prefer paper for brisket on a Traeger unless I am racing the clock.
How long should brisket rest?
At least 1 hour, and 2 to 4 hours is even better if you can hold it warm (in a cooler or a low oven). For food safety, keep the brisket above 140°F internal during a long hold. If your oven does not hold low temps reliably, use a cooler method and check with a thermometer.