Barbecued Texas Beef Brisket

INGREDIENTS

• 1 cup purchased barbecue sauce (such as Bull's-Eye)
• 3 tablespoons coarse salt
• 1/2 cup cider vinegar
• 2 tablespoons chili powder
• 1/2 cup paprika
• 3 tablespoons ground black pepper
• 2 tablespoons Worcestershire sauce
• 1 7 1/2- to 8-pound untrimmed whole beef brisket
• 3 tablespoons sugar
• 12 ounces beer
• 1 tablespoon chili powder
• 1/4 cup vegetable oil
• 1/2 cup water
• 2 tablespoons minced jalapeño chilies