Ozma wants to whip up a snack but has never baked before. Dorothy shows her how to make cookies. But Dorothy accidentally grabs the Potion of Life instead of the vanilla and pours it into the mixing bowl! The hand-mixer spins to life, magically mixing things together as it whizzes around the room. Oh my! The mixer spins out of the palace, mixing everything in its path! Realizing the only way to reverse the mix-up is to reverse the spell, Dorothy and Ozma must use the mirror to change the Potion of Life into the Liquid of Petrification.