Make cupcakes. Prepare batter following recipe directions. Place polka dot baking cups on baking sheet for support. Bake and cool cupcakes in baking cups.
Decorate cupcakes. Prepare buttercream icing following recipe directions. Use tip 2A and buttercream icing in cut disposable decorating bag to pipe swirl on cupcake. Sprinkle with micro hearts sprinkles.
Box cupcakes. Assemble boxes according to package directions. Place box insert in bottom of box. Place cupcake into box. Secure top of box.