Set the sous vide cooker to 155°F / 68°C.
Trim the brisket to your liking if needed.
Pat the brisket dry with paper towels.
Season the brisket with your favorite rub and press the rub in.
Vacuum seal the brisket. Seal twice on each side for added safety.
Drop the brisket in and let it cook for the next 30 or so (+/-6) hours.
Remove the bag with brisket and drop it into an ice bath for 30 minutes.
Place the brisket in the fridge, for up to 1 week, until ready to smoke.
Prepare your smoker. I like to use cherry wood. Target 250°F / 121°C.
Take the brisket out of the bag and dry it using paper towel.
Again, season and press in your favorite rub.
Once the smoke is "clean", smoke the brisket indirect for 2.5 hours, fat cap side up. Optional: Use the brisket drippings from the bag to create steam in the smoker. (e.g. add them to the water bowl of a Weber Smokey Mountain, in a foil pan on the plate setter of a Big Green Egg, etc.). If you have a meat thermometer handy, do not exceed an internal temp on the brisket of 155°F / 68°C (what we originally cooked the brisket to).
Pull from smoker and let rest for 20 minutes.
Slice and serve.