Add the chocolate and milk to a bowl or microwave safe container
Microwave it for 45+ seconds, and mix it together until smooth
Microwave peanut butter for 15-30 seconds (it should be less thick)
In each cupcake wrapper, coat the bottom and some of the side with chocolate (but don't use all of it)
Add a spoonful of peanut butter to the middle
Place in the freezer for 10 Minutes
Top with more chocolate to completely coat the peanut butter
Freeze for 5-10 Minutes (or you can store it in there until you're ready to eat it)