Effy

Effy is a character in the sixth Give Yourself Goosebumps book, Beware of the Purple Peanut Butter. Effy is the owner of Effy's Bakery in Midvale.

History
During a game of hide-and-seek, the reader finds a fridge in their aunt and uncle's basement. Inside the fridge, the reader sees two items: a tub of Purple Peanut Butter and a slice of chocolate cake. If the reader chooses to eat the Purple Peanut Butter, they shrink. If they choose to eat the chocolate cake, they grow and become enormous.

In the hopes of getting help, the reader can seek out Effy. She reveals that the chocolate cake was created by her for a client that was too short, but she added too much "growth spice". Effy agrees to help the reader by making a new cake, one capable of undoing the effects of the chocolate cake from earlier.

In one ending, the reader uses a wrong ingredient and accidentally turns themselves into a gingerbread person, and Effy decides that she can still sell them in her bakery. In another entry, Effy successfully helps the reader, and she gives them some chocolate cupcakes as a gift. The reader accepts the confectioneries, but decides that they should throw them away once Effy is out of sight.

Personality
Effy tries to help the reader, but she isn't incredibly concerned for their well-being. In one ending, the reader is turned into a gingerbread cookie, and she doesn't seem to care about turning them back into a human.

Physical appearance
Effy is described as plump and gray-haired with a small head.

Trivia

 * Effy says that she personally knows Kermit Majors, and the reader recognizes Kermit as being a character from the Goosebumps book Monster Blood III.
 * Since Kermit lives in Georgia, this may hint that Beware of the Purple Peanut Butter also takes place there.