In a medium mixing bowl, stir together all ingredients except the baking chocolate. Place the bar mixture onto a flat surface, such as a plate. Using your hands, evenly flatten bars until they are 1/2 inch thick. The mixture should be about 5x5 inches wide.
Melt baking chocolate or chocolate chips according to package instructions. Once melted, spread over peanut butter mixture. Let bars cool in fridge for five minutes, or until chocolate is solidified.
Cut bars into 1 inch squares. Keep refrigerated in air tight container for up to seven days.
These bars are very malleable and can be pressed into a large square shape very easily. For ease of storage, I usually press out of the bars on a large piece of foil, which doubles as a container.