Here in the south, we have something called ‘tiger butter’. It has equal white chocolate and milk chocolate with the peanut butter mixed in with the white chocolate for the most part. A little peanut butter is added to the milk chocolate for creaminess. Makes it more peanut butter color with chocolate swirled in.
If you want to be extra fancy, you can melt a little dark chocolate to swirl in for two-tone stripes.