I made these last year for a New Year's Eve party and since I know there will be leftover cake again this year, I can't wait to make them again. You will need to include some of the marzipan layer so the mixture binds together but you can use buttercream icing or apricot jam to help with this.
If you can't find lollipop sticks, use a skewer to dip them in chocolate, then set them in mini paper cases.
Use crumbled maderia cake, chocolate cake or brownies instead of fruitcake. Add one tablespoon of icing at a time, until the mixture can be molded.