In a large mixing bowl, mix together the butter, powdered sugar, and peanut butter.
Add the crushed graham crackers to the peanut butter mixture, mixing well.
To create the heart shapes, roll out the peanut butter filling on a lightly floured surface with a rolling pin; roll to about 3/4 inch thickness.
Cut heart shapes with a small heart shaped cookie cutter.
Add the chocolate to a microwave-safe measuring cup or bowl; and melt, starting at 30 seconds, then stirring every 15-20 seconds, 'til melted and smooth.
Dip the hearts in chocolate, using tongs or a candy dipping tool. Once you do a few, you start to get a knack for it, and it becomes easier.
Drip off excess chocolate after dipping, and place the candies on a wax paper covered cookie sheet.
Place the chocolate dipped candies in the fridge to chill, so the chocolate coating can harden. Serve when ready!