Replacing full fat dairy with fat free or reduced fat products don't lessen the sweet impact of this cake. I was recently told by someone who was making this that it makes for a very thin cake if you use a 9X13 cake pan, so if you need to double the recipe if you are using a 9X13. There are only 2 of us, so I usually make this in an 8 inch square pan. I changed the pan size to show this. Hope this helps!