Dahle made her literary début in 1987 with Audiens (Audience), a collection of poetry.[3] Since then Dahle has written over 50 books in different genres, poetry collections, three novels, three novellas, short stories, children' s theatre pieces, radio plays, essays and children's books.[4] Several picture books for children arose from collaboration with her husband, Norwegian illustrator and author Svein Nyhus.
Dahle has received several national awards for her work. In 1999 she was the official festival poet at the Bergen International Festival.[1] In 2002 she won the Brage Prize for literature for Snill (Nice), a picture book for children,[1] and in 2003 the Best Children's Book Prize from the Norwegian Ministry of Culture for Sinna Mann (Angry Man), a book about a boy witnessing domestic violence.[1]
Dahle is a stylistically naïve, imaginative and burlesque writer[1] often focusing on psychological problems and relations.[1] She also gives lectures in creative writing in Norway and Sweden.[1]
In 2013 A Hundred Thousand Hours (original Norwegian title Hundre tusen timer, 1996) was published in English.[5]