If you'd like to make a few novelty chocolate bars for an event or just because, you can do so without too much trouble by 3D-printing or hand-carving a relief image, making a silicone mold of that ...

I've been cooking off and on both professionally and at home for the last 15 years, but chocolate has never interested me. It always seemed too finicky, too exacting, too fickle a food to fuss with.