I found this recipe in my Company's Coming Millennium Edition cookbook. They are a very delicious square without being too sweet. I thought with the condensed milk, 2 sugars and chocolate chips they would be sickly sweet but they're not at all. They are fabulous! The only tip I have about this recipe is that it says to spread the remaining batter on top but it is very hard to "spread" it because of its consistency. Instead I just took little pieces of the dough and flattened it out in my hand and placed it on top of the chocolate layer. It works out fine. I just wanted to update this recipe by saying that doubling this recipe works very well. It just fits into a 9 x 11 pan and the left over dough make amazing oatmeal cookies.