After graduating in 1897, she studied composition in Germany with Wilhelm Berger and Max von Schillings.
In Austria she collaborated with poet and composer Walter Simlinger, who wrote the libretti for her two opera, Der letzte Tanz and Dr. Pipalumbo (1926–1927).
Her mental health problems grew worse, and in 1960 she was hospitalized again, remaining in a nursing home until her death at the age of 94.
The suitcase containing her manuscripts was donated to Haags Gemeentemuseum, and her compositions are currently stored in the Nederlands Muziekinstituut in The Hague.
[2][3] Cramer often incorporated folk themes and cabaret into her works and wrote a number of lieder.