Instructions: 1.Clean fat off brisket. Sprinkle on both sides with onion and garlic powder and celery salt. Put in cooking bag and sprinkle both sides with 3 ounces liquid smoke. Seal bag and refrigerate for at least 24 hours, turning several times to marinate well.

2.Line a baking pan with foil. Put bag in pan and cut holes in bag as per manufacturers instruction. 3.Preheat oven to 275 degrees and cook for 5 hours without "looking in." When finished, let cool at least 15 minutes before slicing thinly with an electric knife.

Serve topped with BBQ sauce.

Barbecue Sauce: Mix all ingredients together and bring to simmer, turn off and cool slightly.

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