This sounds wonderful! I too love anything butterscotch.
My mom had a recipe for butterscotch pie that was to die for - but I failed to look for it and my sister swore it was the one in the Betty Crocker book. So I tried it and not even close. So I asked my aunt (her sister) to see if she knew it and she said my mom had made it long before she was married. She believes it was in a book that my grandmother had - quite possible it was one their church put together. But my aunt never cooked much and my mother started cooking when she was in 7th grade for their family when my grandmother decided to go to work.