4 pounds boneless beef short ribs, cut into 4-inch long pieces
2 teaspoons kosher salt
1 teaspoon black pepper
1 cup ketchup
¾ cup dark brown sugar, packed
1½ tablespoons cider vinegar
1½ tablespoons Worcestershire sauce
1½ tablespoons Dijon mustard
1½ teaspoons chili powder
¾ teaspoons garlic powder
¼ teaspoon cayenne pepper