If you want to pump up the caramel filling get 2 cups of caramels and a couple of tablespoons of heavy cream and melt them in the microwave together. Then put half the cookie dough on the bottom layer, pour over the cooled caramel sauce and the rest of the cookie dough. Refrigerate again until you need to bake and the caramel layer will stay in the middle as long as you sealed all around the poured caramel.