My husband and I are on Weight Watchers. I want to make him a cake for his birthday but I'm looking for one that is somewhat low in points but still tastes REALLY good. His favorite is yellow cake with chocolate frosting. Any suggestions? Is there a way to make the boxed cakes found in the grocery stores (Betty Crocker..etc.) lower in points by using sugar substitutes...etc? And, if so, how do I figure out the points? Thanks in advance!!