Begin by crumbling your leftover cake or cupcakes in a large mixing bowl until it resembles fine crumbs. Add a generous amount of frosting and mix thoroughly until the mixture holds together when pressed.

Take your cakesicle molds and pack the cake and frosting mixture into each cavity, leaving a tiny bit of space at the top for expansion.

Place the filled cakesicle molds into the freezer and let them chill for at least 30 minutes until solid.

While the cakesicles are freezing, melt your coating chocolate according to the package instructions until fully melted and glossy.

Carefully remove the frozen cakesicles from the molds, dip each into the melted chocolate, ensuring they are completely coated.

Before the chocolate sets, add sprinkles or themed decorations to your cakesicles while the chocolate is still wet.

Place your decorated cakesicles on a parchment-lined baking sheet and let them sit at room temperature until the chocolate has completely set.