Place 1 tablespoon flour in oven bag; shake to coat. Place bag in an ungreased 13-in. x 9-in. baking pan; place brisket in bag.
Combine the cranberry sauce, soup, tomato sauce, soup mix and remaining flour; pour over beef. Seal bag. Cut slits in top of bag according to package directions.
Bake at 325° for 2-1/2 to 3 hours or until meat is tender. Carefully remove brisket from bag. Let stand 5 minutes before slicing. Thinly slice meat across the grain; serve with gravy. Yield: 12 servings.