Emily is a prolific composer and songwriter in a variety of genres.
Emily has been a Teaching Artist and composer with the Lullaby Project since its inception in 2011. This Carnegie Hall project pairs new and expecting parents with professional artists to write and sing personal lullabies for their babies, aiding childhood development, maternal health, and strengthening the bond between parent and child. In 2018, Decca Gold released an album of lullabies titled Hopes and Dreams: The Lullaby Project, and this album featured four of Emily's collaborations with new mothers, sung by Rihannon Giddens, Rosanne Cash, and Angélique Kidjo.
Commissioned by Carnegie Hall's Weill Institute, Emily wrote a concert of children's songs that premiered in 2015. Emily's song "What the Star Says" is a backwards version of "Twinkle Twinkle" where the star sings back to the children who wonder about the night sky:
Emily co-composed Nooma, an opera for babies, commissioned by Carnegie Hall in collaboration with the Minnesota and San Francisco Operas. Nooma premiered in 2019 at Carnegie Hall, with Emily singing a lead role.