01 -
In a large mixing bowl, stir together water, onion soup mix, and ketchup until smooth.
02 -
Heat up the oven to 275°F.
03 -
Lay the brisket in a roasting pan, then pour the sauce over it and turn until both sides are coated.
04 -
Use foil to seal the top of the pan tightly. Make sure it doesn’t press directly on the meat or sauce.
05 -
Bake for 7–8 hours. It should be tender enough for a fork but still hold together.
06 -
Let the meat sit for 1–2 hours, then slice into 1/2-inch strips across the grain before serving.