01 - Combine all spice rub ingredients in a bowl and rub evenly over the brisket.
02 - Whisk together all BBQ sauce ingredients until smooth.
03 - Place brisket in the slow cooker, pour half the BBQ sauce over the meat, reserving the remainder for serving.
04 - Cover and cook on low for 8 hours until brisket is very tender and shreds easily.
05 - Remove brisket and let rest for 10 minutes. Slice or shred as preferred.
06 - Skim excess fat from remaining sauce in the slow cooker before serving.
07 - Serve sliced brisket with reserved BBQ sauce and garnish with chopped parsley if desired.