Melt the dark chocolate for the truffles, either in the microwave or using a double boiler (boiling water in a pot with a heat safe bowl over the top where you melt the chocolate!)
Crumble the pound cake into a medium bowl or the bowl of a stand mixer.
Add the melted chocolate, cocoa powder, jam, and rum (or water, or coffee).
Mix until a paste or sticky dough forms.
Shape the dough into balls with your hands (we make 30-32 balls, depending on the size we end up rolling them!)
Set the truffles aside on a plate and place in the fridge.
Now it's time to prepare the decorations! We've listed a few supplies that we use, but this recipe is super flexible. You can substitute ingredients and use your creativity! For example, feel free to use pretzel sticks for the spider legs to make it a little easier.
To make the decorations: Heat up the dark chocolate candy melts and the white chocolate candy melts until melted either in the microwave or using a double boiler. Place about half of the melted mixture for each of the chocolate melts in a plastic sandwich bag. You can put the bag into a glass and fold the edge of the bag over the edge of the glass to make the transfer easier!
Prepare a baking sheet with a piece of parchment paper to pipe on. You may end up needing two sheets of parchment paper depending on how much you are piping.
Cut off a corner of the sandwich bag to start piping. Begin by piping upside down "v" shapes for the spider legs - we pipe both dark chocolate and white chocolate legs.
Make sure you make enough for about 8 spiders of each color chocolate, or just as many as you would like! For 8 spiders, you need to pipe 64 legs (I know it sounds like a lot - your spiders can have less than 8 legs if you like 😂)
Next, pipe bat wings out of the dark chocolate. We pipe one upside down (but very open "v" shape, then connect the sides by piping a few connected semicircles, and then fill in the shape. Repeat with the mirror wing for the other side! For 8 bat truffles, make sure to pipe 16 wings.
Then, pipe dark chocolate ovals for the ghost mouths. For 8 ghosts, pipe 8 ghost mouths.
This next step is optional, but if you don't have candy eyes on hand, you can pipe your own! Pipe white chocolate ovals (in sets of 2) and let them dry; you will need to pipe 32 sets!
Then, pipe a dot of dark chocolate towards the bottom of the ovals. Let this set, and now you have eyes!
Once the parchment paper (or multiple pieces of parchment paper) is full of piped chocolate, you can pop it in the fridge on the baking sheet to set for about 5 minutes. Using candy melts means that it will also set at room temperature, it just may take a little bit longer!
Once all of the chocolate has set, make sure to remelt the remaining dark chocolate and white chocolate so you can dip some of the truffles! You can keep remelting as you work, if the candy melts are starting to set.
Take the truffles out of the fridge and begin making your creatures.