The original recipe calls for 2 cans of dulce de leche, which is what the photos show. Next time we make them, I'll reduce it to 1 can as stated in this recipe. If you like more caramel, use two cans. These are rich bars, so we cut them small and get 20 bars, but you can cut them larger if you'd like. If you'd like the dulce de leche layer to be thicker and not so gooey, use Nestle La Lechera dulce de leche found in the international foods section of your grocery store. It's a thicker variety that will hold shape better.