Dad'S Best Brisket - cooking recipe

Ingredients

5 -7 lbs beef brisket
celery salt
garlic salt
onion salt
pepper
3 ounces liquid smoke
1/2 cup Worcestershire sauce
salt and pepper
1 (18 ounce) bottle barbecue sauce (I use KC Masterpiece)

Preparation

Center brisket on a large heavy piece of foil in a roaster; sprinkle with liquid smoke.
Sprinkle brisket with celery salt, garlic salt, onion salt, and pepper.
Fold sides of foil over to seal; refrigerate overnight.
6 1/2 hour before serving, open foil and season with salt, pepper, and Worcestershire sauce.
Reseal and cook in a slow oven at 300 degrees for 5 hours.
Uncover and Pour barbecue sauce over brisket.
Cook 1 additional hour, uncovered; let sit 20 minutes before slicing.