In a bowl, combine the peanut butter, powdered sugar, and vanilla. The mixture should be easy to roll into balls that stay together while not being sticky. If it is sticky, add just a little more powdered sugar. If it won't form into a ball, add just a little more peanut butter.
1 cup creamy peanut butter, 2 cups powdered sugar, 1 teaspoon vanilla extract
Roll the peanut butter mixture into 1 inch balls.
Dip the balls into the melted candy melts. Place on a parchment-lined baking sheet to harden. (Having trouble rolling and dipping these? See note 2 below.)
14 ounces chocolate candy melts
If you would like to top these, melt some peanut butter chips according to the instructions on the bag. Once melted, pour into a plastic zip lock bag. Cut a tiny hole in one of the corners and use that to pipe it over the top of the peanut butter balls (once the chocolate has set). You can see this in action in the video below.
1/2 cup peanut butter chips
Store in an air tight container at room temperature for up to 2 weeks. These also freeze very well and can be stored in the freezer for up to four months.