Granny's Yum Yum Candy is a brand of confections produced somewhere in New York. The main factory was once haunted by a gluttonous ghost.
While raising quick funds to save Egon, the Ghostbusters took on a job at the main factory of Granny's Yum Yum Candy. After being apprised of the situation in Granny Candy's office, the guys took off and searched the assembly line. A vat of syrup was destroyed in the process. Soon enough, the ghost flew out of some prepared boxes. The ghost gained the upper hand and continued eating until Egon scared him off and Ray trapped it.
- On page nine of Ghostbusters Volume 2 Issue #3, Granny's Yum Yum Candy makes a non-canon cameo as a stand in for the Hershey's store at Broadway and West 43rd Street.
- On page 17 of Ghostbusters International #10, in panel 3, the three baggies of Granny's Yum Yum Candy, from a conveyor belt, make a non-canon cameo on the counter.
- On page 11 of Ghostbusters 101 #6, in panel 2, the sign references Granny's Yum Yum Candy. In panel 4, on the signs on the left, above the 'we have our packs...' bubble is the Granny Candy mascot head seen under the Yum Yum sign.