The source’s father is a second generation Norwegian. Her grandfather immigrated from Norway to Chicago. While marzipan isn’t a specifically Norwegian desert, its found at every family gathering.
What makes the family marzipan unique, is that they always make it in the shape of a potato. This tradition was started by the source’s grandmother, who felt that potatoes were good luck, and wanted to serve marzipan potatoes to the family member so everyone would drive home safely. Her grandmother has since passed on, but the family tradition is now carried on by her Aunt Camille.
I believe that the tradition of making their favorite marzipan desert in the shape of potatoes reflects the family’s new home in Chicago, which has always had a very large Irish population.