His concert debut was at the Odeon in Munich, where he played the opening Allegro to one of Mozart's C major concertos, a free fantasy with variations on a theme from Weber's Der Freischütz, and a rondo by Kalkbrenner.
It was through Flad's influence with King Ludwig I of Bavaria that Henselt was provided the financial means to undertake further study with Johann Nepomuk Hummel in Weimar in 1832 for some months.
Later that year, he went to Vienna, where, besides studying composition under Simon Sechter (the later teacher of Anton Bruckner), he was successful as a concert pianist.
Henselt's playing and teaching greatly influenced the Russian school of music, developing from seeds planted by John Field.
16[5] was once frequently played in Europe, and of his many valuable studies, the Étude in F-sharp major Si oiseau j'étais, was very popular.