prepare a 9x9 pan, line with foil, and butter bottom and sides

place white chocolate chips and 1 cup peanut butter in microwave, stirring every 30sec, till completely smooth

place chocolate chips and the 1/3 cup of peanut butter in bowl and melt in microwave stirring every 30sec till smooth

alternating between the two, drop dollop of fudge in the prepared pan, don't worry on looks

take a table knife and make swirls in fudge, don't over mix, chill in refrigerator for 2hrs, remove from pan, cut into squares, store in container in refrigerator for up to 1 week