Zasu was buried at Holy Cross Cemetery in Culver City, California.
When her best friend Barbara La Marr died in 1926, Zasu and her first husband Tom Gallery adopted her son, Marvin. When the boy was adopted, his name was changed to Don Gallery.
Zasu created a book of her recipes called Candy Hits. The cookbook was published shortly after her death in 1963.
Zasu's name was pronounced "Zay-soo."
Her height was 5'6" (1.68m).