Preheat oven to 275°F
Trim excess fat off the meat, leave a thin layer.
Line the roasting pan with the two layers of foil.
Place meat on foil fat side up.
Rub Beef Base paste on meat both sides, if using it. Optional.
Sprinkle Onion Soup Mix over meat, for a huge brisket two packages
Pour in wine.
Seal the inner foil layer leaving an air pocket, not too compressed.
Seal up second foil layer over the first layer.
Put in oven.
Cook for 1 hour and 15 minutes per pound at 275 F.
Remove brisket from the oven to rest.
Remove sauce to skim fat. Serve separately.
Slice brisket when cooler against the grain, thinly.