And the Italian was at it again as she wrapped up a fifth title in seven years thanks to a personal best free skate in Zagreb, Croatia.
Heading into the final session of the 2013 European Championships Kostner, the current world champion, sat second behind Russian teen sensation Adelina Sotnikova after the short program.
But all that changed as Kostner scored a new best 130.52 points to propel herself into top spot.
Sotnikova was still to skate after Kostner but despite a season's best 126.38 she had to settle for silver.
However there was more joy for Russia as her compatriot Elizaveta Tuktamysheva finished with bronze, while Great Britain’s Jenna McCorkell ended the competition in 21st.