Phineas and Ferb create a slow reacting growth potion to help Baljeet with his "giant" watermelon, but Candace decides to use it for herself, when she finds that she's a little too short to be a flawless girl. Meanwhile, Perry must stop Doofenshmirtz from his most disgusting plan ever!

When Phineas and Ferb get inspired by Candace's dessert club to create the biggest piece of gelatin ever, even Jenny and Stacy want to join in. Meanwhile, Doofenshmirtz has a horrific plan, to turn Perry evil!