Norpro Cupcake Corer, 2 sizes, 3 Piece Set Measures: 4.5" x 2.25" x 2.25" / 11.5cm x 5.5cm x 5.5cm Create your own surprise filled cupcakes and muffins! Interchangeable small and large corers with ejector for standard and jumbo cupcakes and muffins. Hollow out the perfect center space for frosting, pudding, jam, ice cream, marshmallow, whipped cream, custard, caramel, mousse or pie filling. 1. Insert corer, twist and remove cupcake or muffin center core. 2. Fill cupcake or muffin with favorite filling with spoon or injector. 3. Replace top of core and frost.