Find all offline music

[leprello]

I am running Spotify Premium on an iPhone 6s and am having trouble finding all the music that has been downloaded to be used offline. 

I tried going to Settings and turning on Offline mode and turning on "hide unplayable songs".  But in My Library all playlists and albums are still displayed and it's necessary to go to each folder and playlist manually to find music that has been downloaded.

How can I see a list of only music what has been downloaded to local storage on the iPhone?