3 - 5 1/2 lb. brisket
2 tbsp. ketchup
1/2 tsp. liquid smoke
1 tsp. garlic salt
1 tsp. onion salt
2 tsp. celery seed
1/2 tsp. salt
2 tsp. Worcestershire sauce
1 tsp. pepper
1/2 c. barbecue sauce

Mix all ingredients in a bowl. Place brisket in heavy duty foil and cover with sauce. Wrap tightly in the foil and refrigerate overnight. Bake 5 hours at 300 degrees. Remove brisket from foil, allow to cool slightly, then slice diagonally. Add water to juices to make a gravy. Serve with noodles or mashed potatoes.