01 -
Heat up your oven to 275°F.
02 -
Stir the ketchup, onion mix, and water together in a big bowl till it’s smooth.
03 -
Put the brisket in a roasting pan, drizzle the sauce over it, and flip to cover both sides evenly.
04 -
Wrap the pan snugly with foil, but make sure it doesn’t touch the meat or sauce.
05 -
Bake for 7 to 8 hours until it’s tender enough to pierce with a fork but still holds together.
06 -
Let it sit for 1 to 2 hours, then slice it into half-inch pieces across the grain before serving.