A warm swirl of peanut butter melts into chocolate chips and a chocolate cookie base. (kblog.lunchboxbunch.com)
I started with a dark chocolate cookie base, added in swirls of peanut butter and mixed in dark chocolate chips and chopped peanut butter cups. (celebratingsweets.com)
Drag a toothpick or knife through the peanut butter lines to make swirls of peanut butter through the brownie batter. (homemadeinterest.com)