Melt the chocolate according to package instructions. Spoon about 1 teaspoon of the melted chocolate onto parchment paper. Use a spoon to spread the chocolate into a long oval that resembles a bunny ear. Add a 2nd color in the middle if desired. Allow to cool and harden, then peel off the parchment.
Combine the ice cream and milk in a blender and blend on low until smooth.
Pour the milkshake into a jar that has been decorated with eyes, a bunny nose and whiskers. Top with whipped cream and add 2 chocolate ears to create a bunny.