In a double boiler, melt half of your chocolate candy melts and place a third of the way up the mold. Be sure to lubricate your mold with butter. Let sit for 10 minutes while melting the peanut butter melts. Place a strip of melted peanut better on top of the layer of chocolate. Finally cover both with the remainder of the melted chocolate. Place in the refrigerator for 30 minutes. Once harden, take out and enjoy.