Preheat oven to 350°. Line a roasting pan with heavy-duty foil.
In a small bowl, stir together salt, chili powder, brown sugar, garlic powder, mustard, and pepper. Rub mixture over brisket, and place in prepared pan.
Bake for 1 hour. Reduce oven temperature to 300°. Carefully pour broth around brisket. Cover tightly with foil, and bake until brisket is very tender, 3 to 4 hours more. Remove brisket from cooking liquid; let stand for 10 minutes. Slice brisket across the grain into thin slices. Serve with Succotash Relish.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/oven-roasted-beef-brisket-recipe/