It's in the PPM songbook as A Soalin' and I think it's an old traditional song.

Soul a soul a soul cake
Please good missus a soul cake
Apple plum pear cherry
Any good thing to make us all merry
One for Peter two for Paul
One for him who made us all

Bless the master of this house
and the mistress also
and all the little children
That round your table grow

... If you haven't got a penny
a ha'penny will do
If you haven't got a ha'penny
then god bless you...

etc

V