Im trying this. A friend of mine made some this way.
Cooper and bacon.
Cube the cooper in 1" cubes. Put in microwave safe bowl for 2 mins, stir and nuke again for 1 min. Continue until melted. Add bacon when all melted.
You did have your molds all lined with clear wrap?
Press melted cooper into molds the best you can. Work fast as it starts to set up fast.