A few people have sung it including Gracie Fields, Elsie Carlisle, and 'Gert & Daisy' (Elsie & Doris Waters)
Recordings are available:
Here
http://www.musichallcds.com/var19_page.htm
and
http://www.pastperfect.com/Era/1930s-Music/p36.aspx

I found these words written by Lana Smith on the BBC WW2 memories site

Chorus:
Everybody pinches my butter,
They won't leave my butter alone,
And nothing is better than butter,
For keeping the old man at home.
Everybody says I'm old-fashioned
To sit on the things that are rationed.
You can pinch all my ham,
And my plum and apple jam,
But please leave my butter alone.

Verse:
I've got a nice friendly face,
I think you'll agree,
But folk are always popping in to have a cuppa tea,
You may think I'm old-fashioned,
When I argue and shout,
But it's not wars and politics I worry about.

Cheers
Mark