One of the best things about this recipe is you really can use any bar or pieces of chocolate candy you like! My personal favorite combo is chopped Reese's cups, chopped snickers bars, and M&M's or dark chocolate chips which is what you'll see in the photos here. Also, please note that really large caramel or nougat chunks can be used, but may melt out and create a whole or side puddle when baked so it's best to avoid using too many of those if possible.