The gingerbread man movie was shown in the drive-in theater in the episode "Dream of Love." It featured a gingerbread man talking excitedly about large cups with cats on them. There was probably more to the movie, but it was interrupted by Mr. Pig and Tree Trunks' kissing. The movie was played on a projector in black and white, but the movie was probably made after the Mushroom War because there was a Candy Person in it.
Appearance of the gingerbread actor
The gingerbread actor wears a vest and shorts. His stubble and chest hair are made of frosting, and he has short bangs. His eyes are far apart and small, and his nose and mouth are large. His only lines are "Look at this cup. Now, look at this cup. Look at this one!"