Reese's peanut butter cups and Reese's pieces give these gooey cake bars an extreme hit of peanut butter goodness.
*The recipe says use an 8x8x2 pan...that means make sure the sides of your pan are 2 inches high, so the mixture does not bubble over!!!!
**Make sure you freeze your peanut butter cups at least a few hours before you start to make these bars.
***Make sure you also let these bars set completely before cutting into them. They will appear very gooey and undone, but do not worry. They will set up. I usually make them the night before and let them set up overnight before cutting.