Spray the inside of a 6-quart slow cooker with cooking spray.

Combine seasoning ingredients into a bowl. Pat dry the beef brisket and rub well the seasoning all over it.

Mix the sauce ingredients in a bowl until combined.

Add the beef brisket to the slow cooker and completely cover it with half of the sauce.

Refrigerate the remaining sauce to use later.

Cover slow cooker with the lid and cook on low for 8-10 hours, or high setting for 4-5 hours, or until fork-tender.

Preheat oven to 400 degrees F.

When done, transfer the brisket onto a baking sheet lined with foil.

Pour 1/2 cup of the slow cooker juices into the remaining sauce.

Baste brisket with the sauce and broil (or grill) for about 10-15 minutes or until it begins to char and crisp on the edges. Baste again and broil (or grill) until sticky on top and charred on the edges.

Let it rest for 10 minutes before serving.

To serve, slice the brisket thinly across the grain and serve with the remaining sauce.