If using the microwave method please do it in intervals, if you use it on full power for more than 40 seconds at a stretch there are chances the chocolate will burn and that will not be a pretty sight.
Be patient and use it for 40 seconds, stir then again run for 40 seconds. Every microwave is different so heat it for more or less time keeping a close eye on it.
Now all you do is fill the cup with the chocolate mix, keep in the freezer for 5 min.
After 5 min top with the peanut butter mix, chill for another 5 min.
Last top with the chocolate mix, chill for few hrs and then remove from the moulds.
I never use silicon moulds for baking, but they are extremely handy for recipes like these.
Hope you enjoy these treats, I loved them so much that i shared just one with hubby and ate the rest.