The 20th Century Folk Hymnal published in 1974 says it is translated from French, and various websites say that it is based on a French song for Advent.
It was originally published in 1966 and in 1982 copyright was assigned to Kevin Mayhew Ltd. It is included in the current edition of the Celebration Hymnal for Everyone, which has a full-music edition with the entire score.
The lyrics are copyright, but the following sketch gives an idea of the number of verses and flow of the song.
The Bakerwoman in her humble lodge
Received a grain of wheat from God
Make us the bread, Mary, Mary,
Make us the bread we need to be fed.
The Bakerwoman took the road which led
She baked the bread for thirty years
After thirty years the bread was done.
For thirty coins the bread was sold,
And when she saw the bread so white,
Lift up your head, Mary, Mary
Lift up your head for now we've been fed.