Add powdered sugar and vanilla. Mix well, then freeze for 15 minutes. Grab a small ball of PB mixture, roll into a ball and then flatten. Set aside.
Melt chocolate in a pot on low heat until smooth (stirring the entire time). Pour 1 - 2 tbsp of melted chocolate into a cupcake liner in a muffin tin.
Add the rounded, flattened peanut butter and top with 1 - 2 more tbsp melted chocolate. Help flatten chocolate by lightly banging on counter.
Refrigerate 10 minutes or until your chocolate has set.
Refrigerate 10 minutes or until your chocolate has set.