In a large bowl, combine butter with peanut butter until smooth. Add in the powdered sugar until it is fully combined. Fold in the green and purple sprinkles.
Press the dough into a baking dish. Place the chocolate chips into a microwave-safe bowl. And heat in the microwave in 30-second intervals, stirring well until melted.
Pour the melted chocolate over the peanut butter bars. Decorate with the gold, purple, and green sprinkles. Refrigerate for at least 20 minutes, until the chocolate has completely set.
