What's in the Batter? is the eighteenth episode of Littlest Pet Shop season one. It aired on March 2, 2013.
Blythe enlists the pets to retrieve her new favorite necklace that fell inside a vat of batter used for filling a huge cupcake order with Youngmee. This proves difficult for them, when they discover the order was placed by Fisher Bisket for his twin daughter's "quarter-birthday" party.