I made a batch of Dulce de Leche following your formula, Sandra. It took a little longer than an hour, but I might have been cooking it slower. I also cooked a can following boil can in water approach. My initial reaction to a taste test is that the scratch made tasted a little better, the can had a little off flavor in a side by side comparison, although the difference was minor. The bigger difference was textural. The scratch made Dulce had a more syrup-like stickiness to it, while the canned was almost creamier. It's not that one was thicker than the other, just different. I have to say that I preferred the texture of the canned a little more, and preferred the flavor of the scratch a little more. Of course, this was anything but a controlled experiment. The canned was somewhat darker--was it cooked further? Maybe somehow the method of cooking it in the can caramelizes the milk without reducing it as much, therefore accounting for the textural difference? As of now my conclusion is that they are both pretty close to each other, and both delicious. Since I'm not sure what I'm going to do with the Dulce(besides eating on ice cream every night), I don't know whether one might be better for some uses than the other. The Jamie Oliver recipe sounds interesting is it possible for someone to post it?