Munthe attended
Hartvig Nissen's school for girls in
Christiania (
Nissens Pigeskole), and graduated with a middle school exam ('''') in 1879. She worked as a
governess at her home place for one year, and then ran a private school in
Langesund. She wrote a large number of song texts to folk melodies and psalm melodies, many of which are still popular today. Among her classical songs are "Hurra for deg som fyller ditt år!", "På låven sitter nissen" (), "Å jeg vet en seter", "Da klokken klang", "Nei, nei gutt", "Tulla" and "Jeg snører min sekk". She published the songbooks
Kom, skal vi synge (three collections, from 1905 to 1918). She wrote the fairytale comedy
Aase Fiskerjente, published as a book in 1912 with illustrations by
Andreas Bloch. Among her other comedies for children are
Askepot,
Den nysgjerrige kone and
Prinsessen og det halve rike. ==Legacy==