To create these easy to decorate pull-apart cupcake cakes, place the liners into shaped pans. Then, pour the cupcake batter in and bake. The cupcakes will conform to the pan and create different shapes cupcakes that are still easy to separate. In this case, use a heart shaped pan.
100 Buttercream Flowers: The Complete Step-by-Step Guide to Piping Flowers in Buttercream Icing (Paperback)