Line baking or Pyrex dish with heavy duty foil. Lay brisket on foil. Cover with 1 bottle Heinz Chili Sauce and 1 package onion soup mix. Cover brisket tightly all around with the foil.
This is important! Bake at 350F for 2 1/2 hours for 3 pounds,
3 hours for 4 pounds, etc. Bake day before, if possible. Let stand 1/2 hour before carving… Everything is in the foil! No mess and wonderful!