Another 3 ingredient wonder. It worked and we used 70% chocolate despite the warning not to. I did add 2 tablespoons cream to my chocolate as it was way too stiff when melted. I made my own dulce de leche; I always do so I have no idea what the canned product looks like. Maybe mine is too solid, not solid enough???
Anyway it surprisingly cuts like a thin brownie; I used my only square pan, a 9 inch, would have been better in the 8" called for. I didn't get a swirl due to thickness of my homemade dulce de leche and the thinness of the brownie.
Nonetheless, we'd make it again! We like deep dark chocolate so we're happy with its pronounced flavor.