Preheat oven to 450°.
Coat an 8-inch cast-iron skillet with cooking spray. Place the pan in a 450° oven for 5 minutes.
Combine brown sugar and next 4 ingredients (brown sugar through pepper); rub over both sides of steak. Place steak in preheated pan.
Bake at 450° for 7 minutes on each side or until desired degree of doneness. Let stand 5 minutes. Cut steak diagonally across grain into thin slices.