"it's Not a Secret" Brisket

This is my Memaw's recipe. Being from Texas, brisket is what makes BBQ. I love this recipe!

• Ready In: 4 hrs 25 mins
• Serves: 8-12

Ingredients

• 1 (4 -8 lb)  beef brisket (trimmed)
• 1  tablespoon  garlic salt
• 1  tablespoon  celery salt
• 1  tablespoon  creole seasoning (I prefer Tony Cachere's but any will do)
• 1  tablespoon black pepper
• 1  tablespoon  onion salt
• 1 (4 ounce) bottle liquid smoke
• 1  oven cooking bag, appropriately sized according to weight

Directions

1. Heavily coat all sides of the meat with the seasonings.
2. Place fat side DOWN in oven bag.
3. Pour liquid smoke into bag and over meat.
4. Seal bag and allow to marinate overnight.
5. Place fat side UP in pan, cook at 325 degrees for 4 hours for smaller brisket, longer if 8 lbs. Test with fork through the bag, should be easily pierced and tender, with no blood oozing.
6. Allow to rest 10- 20 minutes outside oven. ALWAYS cut brisket against the grain.
7. Serve and enjoy!