I have made this cake several times because everyone keeps asking for it! I replace the oil with real butter and replace the water with strong coffee. I do not put the chocolate squares in the cake because it really doesn't add anything to the flavor, it just gets lost. Instead I put the chocolate squares in my food processor and grind it up fine and then sprinkle it on the top of the cake before the icing get hard. The cake gets very dense, almost brownie like, after sitting in the refrigerator over night and that is when it is at its best, you must keep it refrigerated. Trust me it is worth making, you will love it as the recipe is stated or with the changes I have made!