Biffany "Biff" Van Stomm is the mother of Buford Van Stomm.
Biffany was mentioned when Buford told Phineas that she was going to pick him up at 4 P.M. ("Raging Bully"). She went to the Flynn-Fletcher backyard when Candace called her, Baljeet's mother, Irving's mother, and Linda to bust Buford, Baljeet, Irving, and Albert who were all involved in "bust-worthy activity" ("Not Phineas and Ferb").
She has blue eyes, brown hair and green earrings. Her dress is yellow with green leaves and red flowers on it.
- Her husband was not mentioned and has not appeared in the show.
- Buford's goldfish, Biff, is named after her.
- Her appearance (as well as her voice) is very similar to that of her son's.
- She likes cookies. ("Not Phineas and Ferb").
- "Not Phineas and Ferb" (First appearance)
- "Rollercoaster: The Musical!" (Cameo)
- "Phineas' Birthday Clip-O-Rama!" (Speaking cameo)
- "It's No Picnic" (Cameo)